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Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Interviews in Washington, DC for Albert Einstein Fellowship Semi-Finalists  

Broader source: Energy.gov [DOE]

Selected semi-finalists in the Albert Einstein Distinguished Educator Fellowship are invited to DC for interviews.

2

The Collaboration of Mileva Maric and Albert Einstein  

E-Print Network [OSTI]

This is a contemporary review of the involvement of Mileva Maric, Albert Einsteins first wife, in his theoretical work between the period of 1900 to 1905. Separate biographies are outlined for both Mileva and Albert, prior to their attendance at Zurich Polytechnic in 1896. Then a combined journal is described, detailing significant events. In additional to a biographical sketch, comments by various authors are compared and contrasted concerning two narratives. Firstly, the sequence of events that happened and the couples relationship at particular times. Secondly, the contents of letters from both Albert and Mileva. Some interpretations of the usage of pronouns in those letters during 1899 and 1905 are re-examined, and a different hypothesis regarding the usage of those pronouns is introduced. We examine various papers and compare the content of each subsequent paper to the work that Mileva was performing. With a different take, this treatment further suggests that the couple continued to work together much l...

Asmodelle, Estelle

2015-01-01T23:59:59.000Z

3

Zurek awarded Albert Einstein professorship prize  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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4

E-Print Network 3.0 - albert einstein--chief engineer Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

einstein--chief engineer Search Powered by Explorit Topic List Advanced Search Sample search results for: albert einstein--chief engineer Page: << < 1 2 3 4 5 > >> 1 Networking The...

5

E-Print Network 3.0 - albert einstein cancer Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cancer Search Powered by Explorit Topic List Advanced Search Sample search results for: albert einstein cancer Page: << < 1 2 3 4 5 > >> 1 TRANSFORMING THE FUTURE OF HUMAN HEALTH...

6

Albert Einstein Distinguished Educator Fellowship (AEF) Program Homepage |  

Office of Science (SC) Website

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7

Albert Einstein College of Medicine Application for Non-human Use of Radioactive Material  

E-Print Network [OSTI]

RSO-1 Rev.0 Albert Einstein College of Medicine Application for Non-human Use of Radioactive pipettes: Fume hood: Absorbent liner & Tray Shielding: Lead: Lucite: GM survey meter: Handling tongs radioactive material is secure against unauthorized access: 9. Please check the type of application below

Emmons, Scott

8

Albert Einstein College of Medicine Amendment to Non-human Use of Radioactive Material License  

E-Print Network [OSTI]

RSO-2 Rev.0 Albert Einstein College of Medicine Amendment to Non-human Use of Radioactive Material License INSTRUCTIONS: If you wish to make changes to your license to use radioactive material please exposure; Glove box: Mechanical pipettes: Fume hood: Absorbent liner & Tray Shielding: Lead: Lucite: GM

Emmons, Scott

9

Albert Einstein Alerts President Roosevelt of German Atomic Energy...  

National Nuclear Security Administration (NNSA)

possibility that research might lead to developing powerful bombs. Einstein notes that Germany has stopped the sale of uranium and German physicists are engaged in uranium...

10

Albert Einstein's close friends and colleagues from the Patent Office  

E-Print Network [OSTI]

In the Patent Office Einstein hatched his most beautiful ideas, and there he spent his "Happy Bern Years". These wonderful ideas led to his miraculous year works of 1905. Einstein was not an expert in academic matters, and he was out of academic world. Neither did he meet influential professors, or attend academic meetings. He discussed his ideas with his close friends and colleagues from the Patent Office. In 1907 he finally got his foot into the academic doorway; Einstein became a privatdozent and gave lectures at the University of Bern. However, his first students consisted again of his two close friends and another colleague from the Patent Office.

Weinstein, Galina

2012-01-01T23:59:59.000Z

11

E-Print Network 3.0 - albert einstein centenary Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Albert (1920) "Fundamental ... Source: Norton, John D.- Department of History and Philosophy of Science, University of Pittsburgh Collection: Multidisciplinary Databases and...

12

Albert Einstein Distinguished Educator Fellowship Act of 1994 in U.S.C. |  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energyon ArmedWaste andAccess to OUO Access to OUOAlaska Feature Articles andAlaska

13

Niels Bohr's discussions with Albert Einstein, Werner Heisenberg, and Erwin Schroedinger: the origins of the principles of uncertainty and complementarity  

SciTech Connect (OSTI)

In this paper, the main outlines of the discussions between Niels Bohr with Albert Einstein, Werner Heisenberg, and Erwin Schroedinger during 1920-1927 are treated. From the formulation of quantum mechanics in 1925-1926 and wave mechanics in 1926, there emerged Born's statistical interpretation of the wave function in summer 1926, and on the basis of the quantum mechanical transformation theory - formulated in fall 1926 by Dirac, London, and Jordan - Heisenberg formulated the uncertainty principle in early 1927. At the Volta Conference in Como in September 1927 and at the fifth Solvay Conference in Brussels the following month, Bohr publicly enunciated his complementarity principle, which had been developing in his mind for several years. The Bohr-Einstein discussions about the consistency and completeness of quantum mechanics and of physical theory as such - formally begun in October 1927 at the fifth Solvay Conference and carried on at the sixth Solvay Conference in October 1930 - were continued during the next decades. All these aspects are briefly summarized.

Mehra, J.

1987-05-01T23:59:59.000Z

14

Albert Einstein - Hanford Site  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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15

Zurek awarded Albert Einstein  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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16

Transforming Education at Einstein  

E-Print Network [OSTI]

Transforming Education at Einstein EinstEin Winter/spring 2012 The Magazine for Alumni and Friends trANsfOrMiNg eDuCAtiON At eiNsteiN Education at Albert Einstein College of Medicine is undergoing

Yates, Andrew

17

2013 Fall : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Distinguished Britton Eric John Distinguished Brown Amy Austin Distinguished Brown Andrew Irvan Distinguished Brown Jillian Rochell Distinguished Brown Nicholas William Distinguished Brown Shannon Elizabeth Distinguished Calvin Bro Elena Distinguished Campanaro Margaret Holland Distinguished Campbell Carla Elizabeth

Kasman, Alex

18

2012 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Meagan Lynn Distinguished Alley Aimee K Distinguished Altman Caitlin Breyana Distinguished Anderson Hannah Taylor Distinguished Anderson Leah Ellen Distinguished Andrade Alexander Fonseca Distinguished Applebaum David Joseph Distinguished Aquino Jeri-Lynn Distinguished Armistead Mary Chandler Distinguished

Kasman, Alex

19

2010 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Arthur Distinguished Brooksbank Michelle Dales Distinguished Brown Kayla Alexis Distinguished Buddin Ingelsby Distinguished Calhoun Stacy Michelle Distinguished Campbell Brian Joseph Distinguished Campbell

Kasman, Alex

20

2009 Fall : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Distinguished Brooksbank Michelle Dales Distinguished Brown Anna Laughlin Distinguished Bruynell Trisha N Campbell Brian Joseph Distinguished Campbell Kathryn Elizabeth Distinguished Cannon Micah Q Distinguished

Kasman, Alex

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

2014 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Lauren Ashley Distinguished Brophy Samantha Eileen Distinguished Brown Olivia Leigh Distinguished Brown Distinguished Campbell Christopher Reid Distinguished Campbell Elizabeth Merritt Distinguished Campbell Mitchell

Kasman, Alex

22

2008 Fall : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Laura E Distinguished Brown Kyle R Distinguished Brown Leland D Distinguished Brown Lindsay Jane Augustus, Distinguished Camp Austen Nicholas Distinguished Campbell Susan S Distinguished Cannon Clifton M

Kasman, Alex

23

2013 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Adams Olivia Leigh Distinguished Adickes Elizabeth Bryant Distinguished Advani Kirti Priya Distinguished Diane Rose Distinguished Brahney Meghan Elizabeth Distinguished Brantley Kindall G Distinguished

Kasman, Alex

24

2011 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

Distinguished Borges Catherine Rebecca Distinguished Bowen Meredith Ann Distinguished Bowers Michelle Diane Distinguished Bryan Brittany Alexandra Distinguished Bryant Taylor Danielle Distinguished Buazza Maryam Mahmud

Kasman, Alex

25

2009 Spring : Distinguished Honors Distinguished  

E-Print Network [OSTI]

_NAME MIDDLE_NAME HONORS Bumpus Kirby Kieran Distinguished Burigo Julia Tess Distinguished Burnett Ross Hampton Distinguished Cian Holly Rose Distinguished Ciappa Anna Corbi Distinguished Cinnante James M Distinguished Clark

Kasman, Alex

26

Absurdo, revolta, ação : Albert Camus.  

E-Print Network [OSTI]

??Em nossa dissertação, procuramos pensar a ação a partir do itinerário filosófico de Albert Camus. A princípio, investigaremos as possibilidades da ação a partir da… (more)

Patricia de Oliveira Machado

2010-01-01T23:59:59.000Z

27

2012 Fall : Highly Distinguished Honors Highly Distinguished  

E-Print Network [OSTI]

Distinguished Andersen Meredith Esther Highly Distinguished Anderson Anna Kathleen Highly Distinguished Anderson Leah Ellen Highly Distinguished Anderson Lucy Paige Highly Distinguished Andrews James Matheson Highly Distinguished Aquino Jeri-Lynn Highly Distinguished Armistead Mary Chandler Highly Distinguished Armstrong Jessa

Kasman, Alex

28

2011 Spring : Highly Distinguished Honors Highly Distinguished  

E-Print Network [OSTI]

Elizabeth Campbell Highly Distinguished Bowker Ripley Eden Highly Distinguished Brandfass Lara Rose Highly Distinguished Brotherton Cara Price Highly Distinguished Brown Anna Laughlin Highly Distinguished Brown Chloe Alix Highly Distinguished Brown Kelsey Michelle Highly Distinguished Brown Kyle Truman Highly

Kasman, Alex

29

2013 Fall : Highly Distinguished Honors Highly Distinguished  

E-Print Network [OSTI]

Anderson Chelsea Mariah Highly Distinguished Anderson Madison Olivia Highly Distinguished Andrews James Askew Mary Frances Highly Distinguished Augustine Andrew William Highly Distinguished Austin Adrian Bailes Mary Elizabeth Highly Distinguished Bailey Erika Leigh Highly Distinguished Bailey Margaret

Kasman, Alex

30

Albert Camus et le christianisme.  

E-Print Network [OSTI]

??Pour Albert Camus le problème dominant du XXe siècle est de savoir, "si l'homme sans le secours de l'éternel ou de la pensée rationaliste peut… (more)

Reekie, Julia Lamont

2012-01-01T23:59:59.000Z

31

Albert Bond | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Bond - Project Officer, Golden Field Office Albert Bond is a Project Officer at the Golden Field Office. Most Recent New Choctaw Nation Recycling Center Posts Quick Results March 8...

32

2009 Spring : Highly Distinguished Honors Highly Distinguished  

E-Print Network [OSTI]

Armstrong Anna P Highly Distinguished Armstrong Jack Ray Highly Distinguished Armstrong Sarah Rose Highly

Kasman, Alex

33

Engineering Virtualized Services Elvira Albert  

E-Print Network [OSTI]

Engineering Virtualized Services Elvira Albert Complutense University of Madrid, Spain elvira project FP7-610582 ENVISAGE: Engineering Virtualized Services (http://www.envisage-project.eu). level of an application-level service at the expense of potentially changing its cost profile. In traditional engineering

Johnsen, Einar Broch

34

Manhattan Project: Einstein's Letter, 1939  

Office of Scientific and Technical Information (OSTI)

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35

ausstellung albert einstein: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

his revolutionary theory? Was this an act of spontaneous creation by an ingenious mind which is not explainable? This is the customary view of important and deep scientific...

36

Albert Einstein College of Medicine Center for Experimental Therapeutics  

E-Print Network [OSTI]

new trend has evolved within the pharmaceutical industry, which threatens the develop- ment of new, the playing field has changed dramatically. The pharmaceutical industry is grappling with long- term fiscal Probe to Lead Preclinical Pharmaceutical/Biotech Industry Clinical Trials Pharmaceutical

Kenny, Paraic

37

Albert Einstein Alerts President Roosevelt of German Atomic Energy Program  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartmentStewardshipAdministration helps| National Nuclear Security

38

Albert Camus and the Phenomenon of Solidarity.  

E-Print Network [OSTI]

??In an interview, Albert Camus once said, “I am not a philosopher. I don’t believe enough in reason to believe in a system. What interests… (more)

Purdue, Zachary James

2011-01-01T23:59:59.000Z

39

Centenarian Einstein  

ScienceCinema (OSTI)

Commémoration de A.Einstein avec 4 orateurs pour honnorer sa mémoire: le prof.Weisskopf parlera de l'homme de science engagé, Daniel Amati du climat de la physique aux années 1920, Sergio Fubini de l'heure scientifique d'A.Einstein et le prof.Berob(?)

None

2011-04-25T23:59:59.000Z

40

Einstein: His Impact on Accelerators; His Impact on theWorld  

SciTech Connect (OSTI)

The impact of the work of Albert Einstein on accelerator physics is described. Because of the limit of time, and also because the audience knows the details, the impact is described in broad strokes. Nevertheless, it is seen how his work has affected many different aspects of accelerator physics. In the second half of the talk, Albert Einstein's impact on the world will be discussed; namely his work on world peace (including his role as a pacifist, in the atomic bomb, and in arms control) and his efforts as a humanitarian (including his efforts on social justice, anti-racism, and civil rights).

Sessler, A.

2005-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Beyond Einstein  

SciTech Connect (OSTI)

The National Academy of Sciences was commissioned in 2006 to report on how to restart the Beyond Einstein program, which includes missions to understand dark energy, test general relativity, and observe gravity waves from merging supermassive black holes. This colloquium by one of the members of the recently released Academy study will explain the research strategy that the report proposes and its implications for continued U.S. participation in the exploration of the universe.

Primack, Joel (University of California, Santa Cruz) [University of California, Santa Cruz

2007-10-08T23:59:59.000Z

42

Peste e Estrangeiridade em Estado de Sitio de Albert Camus.  

E-Print Network [OSTI]

??Trata-se, nesta dissertação, de um estudo da peça Estado de Sítio (1949) de Albert Camus, tendo como eixos os conceitos de peste e de estrangeiridade.… (more)

Sandra de Padua Castro

2007-01-01T23:59:59.000Z

43

O sentido do exílio em \\ La Peste\\ de Albert Camus.  

E-Print Network [OSTI]

??O exílio é um tema recorrente, embora pouco explorado, em Albert Camus. Sua obra é organizada em dois ciclos de criação: o absurdo e a… (more)

Cristianne Aparecida de Brito Lameirinha

2007-01-01T23:59:59.000Z

44

Le Figure Femminili nei testi narrativi di Albert Camus.  

E-Print Network [OSTI]

??Il presente studio si propone di analizzare i personaggi femminili nei testi narrativi di Albert Camus, nella maggior parte dei quali le donne, nei ruoli… (more)

Erdas, Pier Giorgio

2006-01-01T23:59:59.000Z

45

The strains of cynical consciousness in Albert Camus.  

E-Print Network [OSTI]

??The aim of this thesis is to determine that which constitutes cynical consciousness within the works of Albert Camus, as well as to consider the… (more)

Mercado, Robert

2005-01-01T23:59:59.000Z

46

albert einsteini geeniuse: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a novel approach Puebla, Germn 23 5 Measuring Behavioral Energetics Albert F. Bennett Environmental Sciences and Ecology Websites Summary: 5 Measuring Behavioral...

47

48th Annual Distinguished  

E-Print Network [OSTI]

Electrical Engineering Technology » 1993 Wade Smith Mechanical Engineering » 1989 Presentation respected international energy consultancy. Baker & O'Brien, Inc. currently has offices in Dallas, Houston48th Annual Distinguished Engineer Awards Luncheon Friday, April 11, 2014 11:15 a.m. Sunset

Gelfond, Michael

48

apcs distinguishes hiv-1: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Distinguished Aragone Rachel Distinguished Ard Sheri M Distinguished Louise Distinguished Campbell Christopher Warren Distinguished Campbell Samantha Lyn Distinguished Carson...

49

Quantum Physics Einstein's Gravity  

E-Print Network [OSTI]

Quantum Physics confronts Einstein's Gravity Matt Visser Physics Department Washington University Saint Louis USA Science Saturdays 13 October 2001 #12; Quantum Physics confronts Einstein's Gravity and with Einstein's theory of gravity (the general relativity) is still the single biggest theoretical problem

Visser, Matt

50

Pafnuty Chebyshev, Steam Engines, and Polynomials by John Albert  

E-Print Network [OSTI]

Pafnuty Chebyshev, Steam Engines, and Polynomials by John Albert OU Mathfest, January 2009 1 professorship at age 61, but continued to work on mathematics right up to his death at age 73. 2. Steam Engines

Albert, John

51

Bruce Alberts, a prominent biochemist who is the Editor-  

E-Print Network [OSTI]

the Bulletin Bruce Alberts, a prominent biochemist who is the Editor- in-Chief of the international Recognition Award Ceremony held in Berkner Hall on Friday, June 18. The awards, consisting of a plaque and $10

Ohta, Shigemi

52

ALBERT EINSTEIN COLLEGE of MEDICINE of YESHIVA UNIVERSITY DEPARTMENT of ENVIRONMENTAL HEALTH and SAFETY  

E-Print Network [OSTI]

EQUIPMENT Yes No N/A Hard hat Gloves Safety Glasses Work Shoes Knee Pads Hearing Protectors Respirator Face and SAFETY HEALTH and SAFETY CONSTRUCTION SAFETY AUDIT FORM Job Location: Field Supervisor: Safety Officer Performing Audit: Scope of Project: Has area been cleared by Safety: Yes No N/A Date: PERSONAL PROTECTIVE

Emmons, Scott

53

E-Print Network 3.0 - albert einstein otto Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physik 1 (Elementarteilchenphysik) Collection: Physics 5 JOHN EARMAN and CLARK GL YMOUR LOST IN THE TENSORS Summary: , 111. 60680, U.S.A. We are grateful to Dr. Otto...

54

ALBERT EINSTEIN COLLEGE of MEDICINE of YESHIVA UNIVERSITY DEPARTMENT of ENVIRONMENTAL HEALTH and SAFETY  

E-Print Network [OSTI]

cars and roads with ice. Ice storms and freezing rain are making roads into skating rinks across and SAFETY UNIVERSITY ACCIDENT and INJURY REDUCTION CAMPAIGN "How To Drive On Ice" Recent storms have coated, trying to drive on ice is much worse. Snow tends to make it harder to get a vehicle moving, ice makes

Yates, Andrew

55

E-Print Network 3.0 - albert einstein und Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

, Humanitarian - Youngstown State - March ... Source: Howard, Don - Department of Philosophy, University of Notre Dame Collection: Multidisciplinary Databases and Resources 4...

56

ALBERT EINSTEIN COLLEGE OF MEDICINE GLOBAL HEALTH SUMMER/SENIOR FELLOWSHIP  

E-Print Network [OSTI]

ADDRESS: NUMBER AND STREET CITY STATE ZIP CODE HOME PHONE: CELL PHONE: WORK PHONE: _____ (initial) I MENTOR CONTACT INFORMATION LAST NAME: FIRST NAME: DEPARTMENT: TITLE: HOME PHONE: CELL PHONE: WORK PHONE ADDRESS: CURRENT ADDRESS: NUMBER AND STREET CITY COUNTRY HOME PHONE: CELL PHONE: WORK PHONE: PREFERRED WAY

Yates, Andrew

57

Einstein for Everyone  

ScienceCinema (OSTI)

Young Einstein was a rebel who seemed doomed to fail. How did he overcome rejection to become the most famous scientist in history? We will discuss and explain all his theories in plain English and without math, and we will discover how Einstein's achievements impact our lives through DVDs, GPS, iPods, computers and green energy.

Piccioni, Robert

2014-06-25T23:59:59.000Z

58

Albert Ludwig University of Freiburg Occupational health and safety  

E-Print Network [OSTI]

Effective safety at work can be accomplished only if the employees cooperate. You are obligated to · payAlbert Ludwig University of Freiburg Occupational health and safety Leaflet for employees Numerous laws and regulations have been passed to guarantee occupational health and safety. Industrial safety

Schindelhauer, Christian

59

Teaching Bayes' Rule: A Data Oriented Jim Albert 1  

E-Print Network [OSTI]

Teaching Bayes' Rule: A Data Oriented Approach Jim Albert 1 Bowling Green State University March 1997 1 Address for correspondence: Department of Mathematics and Statistics, Bowling Green State University, Bowling Green, OH 43403, USA. #12; Abstract There is a current emphasis on making

Albert, James H.

60

The Homerun Hitting of Mike Schmidt Jim Albert 1  

E-Print Network [OSTI]

The Homerun Hitting of Mike Schmidt Jim Albert 1 Bowling Green State University January, 1998 1 Address for correspondence: Department of Mathematics and Statistics, Bowling Green State University, Bowling Green, OH 43403, USA. #12; Abstract Mike Schmidt was one the great homerun hitters in major league

Albert, James H.

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION Albert Ali Salah  

E-Print Network [OSTI]

BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION by Albert Ali Salah B.S, in Computer Engineering, Bogazi of Doctor of Philosophy Graduate Program in Bogazi¸ci University 2007 #12;ii BIOLOGICALLY MOTIVATED 3D FACE. Hayim Molinas. #12;iv ACKNOWLEDGEMENTS With gratitude to my PhD advisor Lale Akarun for her boundless

62

Tomé wins Distinguished Scientist, Engineer Award  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Recipient of the 2013 Distinguished ScientistEngineer Award Tom wins Distinguished Scientist, Engineer Award The Minerals, Metals & Materials Society recognized Tom for his...

63

“A Hero of Our Time”, Satire in Albert Camus’ The Fall.  

E-Print Network [OSTI]

?? The aim of the essay is to show that Albert Camus’ novel The Fall despite the seriousness of the subjects it deals with can… (more)

Rasoulpour, Mastaneh

2013-01-01T23:59:59.000Z

64

Albert Camus's Meditative Ascent: A Search for Foundations in the Plague.  

E-Print Network [OSTI]

??Albert Camus's concept of absurdity states that human existence is fundamentally chaotic and meaningless. Despite this appraisal of existence, Camus tirelessly campaigned for human rights… (more)

Blanchard, Brian James

2006-01-01T23:59:59.000Z

65

Albert Camus: a felicidade e a relação homem-natureza em diálogo com Epicuro.  

E-Print Network [OSTI]

??Este trabalho visa discutir o conceito felicidade e a relação homem-natureza nos ensaios de juventude de Albert Camus: Noces e Le mythe de Sisyphe. Supomos… (more)

Fernando Rocha Sapaterro

2005-01-01T23:59:59.000Z

66

Western consciousness, absurdity, and rebellion: the influence of paradox in the early works of Albert Camus.  

E-Print Network [OSTI]

??This thesis explores the paradoxical nature of Albert Camus's ideas of Western consciousness, absurdity, and rebellion. Camus believes that as members of the Occident, we… (more)

Lanier, Clinton David

2012-01-01T23:59:59.000Z

67

EXISTÊNCIA E RELIGIÃO EM ALBERT CAMUS: Relações entre o absurdo e a revolta.  

E-Print Network [OSTI]

??A presente pesquisa busca, a partir dos dois pólos fundamentais ao pensamento de Albert Camus, a saber, o absurdo e a revolta, discutir a relação… (more)

KLEITON CERQUEIRA DE ALMEIDA

2010-01-01T23:59:59.000Z

68

Victoria & Albert Museum- Medieval & Renaissance Galleries: A Passive Approach to Humidity Control  

E-Print Network [OSTI]

Victoria & Albert Museum, London Medieval & Renaissance Galleries: A Passive Approach to Humidity Control Andrew Lerpiniere Steve Walker Michael Bingham Associate Director Associate Director Engineer Arup London, UK ABSTRACT The new... usage, running costs and carbon dioxide emissions of the galleries. REFERENCES 1. Victoria & Albert Museum; Medieval & Renaissance; Environmental Analysis of Perimeter galleries; November 2006; Andrew Lerpiniere, Michael Bingham, Steve...

Lerpiniere, A.; Bingham, M.; Walker, S.

2010-01-01T23:59:59.000Z

69

apomucin phenotype distinguishes: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lauren Ruth Distinguished Brooks Laura E Distinguished Brown Kyle R Distinguished Brown Leland D Distinguished Brown Lindsay Jane Kasman, Alex 15 2009 Fall : Highly...

70

Was Einstein 100% right ?  

E-Print Network [OSTI]

The confrontation between General Relativity and experimental results, notably binary pulsar data, is summarized and its significance discussed. The agreement between experiment and theory is numerically very impressive. However, some recent theoretical findings (existence of non-perturbative strong-field effects, natural cosmological attraction toward zero scalar couplings) suggest that the present agreement between Einstein's theory and experiment might be a red herring and provide new motivations for improving the experimental tests of gravity.

T. Damour

1994-12-21T23:59:59.000Z

71

Liouville gravity from Einstein gravity  

E-Print Network [OSTI]

We show that Liouville gravity arises as the limit of pure Einstein gravity in 2+epsilon dimensions as epsilon goes to zero, provided Newton's constant scales with epsilon. Our procedure - spherical reduction, dualization, limit, dualizing back - passes several consistency tests: geometric properties, interactions with matter and the Bekenstein-Hawking entropy are as expected from Einstein gravity.

D. Grumiller; R. Jackiw

2007-12-28T23:59:59.000Z

72

Western consciousness, absurdity, and rebellion: the influence of paradox in the early works of Albert Camus  

E-Print Network [OSTI]

This thesis explores the paradoxical nature of Albert Camus's ideas of Western consciousness, absurdity, and rebellion. Camus believes that as members of the Occident, we are the products of both the Greco-Roman and Judeo-Christian cultures. We...

Lanier, Clinton David

2012-06-07T23:59:59.000Z

73

L'intertextualité avec les textes religieux dans l'oeuvre d'Albert Camus.  

E-Print Network [OSTI]

??Cette thèse traite de la présence des textes religieux dans l'œuvre d'Albert Camus. Il s'agit de mettre en évidence l'intertextualité qui apparaît, sous différentes formes,… (more)

Al-Ibadi, Khudhair Abbas Mathi

2012-01-01T23:59:59.000Z

74

Existentialist ethical thought in the theatre of Gabriel Marcel, Albert Camus, and Jean-Paul Sartre.  

E-Print Network [OSTI]

??The Existentialist thought of Gabriel Marcel (1889-1973), Albert Camus (1913-1960), and Jean-Paul Sartre (1905-1980) is dominated by a concern for the ethical, and Marcel, Camus,… (more)

Tattam, Helen

2007-01-01T23:59:59.000Z

75

Tra letteratura e filosofia: l' influenza del pensiero nietzscheano sull' opera di Albert Camus.  

E-Print Network [OSTI]

??L'intento del mio studio è rinvenire l'influenza che il pensiero di F. Nietzsche ha avuto sull'opera di Albert Camus. La prima parte del mio elaborato… (more)

COLUCCINI, RACHELE

2013-01-01T23:59:59.000Z

76

L’esthétique de la manipulation dans l’œuvre d’Albert Camus.  

E-Print Network [OSTI]

??La manipulation est présente au cœur de l’œuvre d’Albert Camus. Elle s’exerce tant au niveau des personnages qu’au niveau du lecteur. Jean-Baptiste Clamence, dans La… (more)

Marty, Claire

2011-01-01T23:59:59.000Z

77

West Indian mammals from the Albert Schwartz Collection: Biological and historical information  

E-Print Network [OSTI]

In the period 1954-1976, Albert Schwartz and several students working with him made extensive collections of mammals (ca. 2,000 specimens), reptiles and amphibians, birds, and butterflies in the West Indies. Schwartz's ...

Timm, Robert M.; Genoways, Hugh H.

2003-06-01T23:59:59.000Z

78

PERSPECTIVE Assessing the robustness of networks of spatial genetic Eva M. Albert,1  

E-Print Network [OSTI]

. Albert,1 Miguel A. Fortuna,1 Jose A. Godoy1 and Jordi Bascompte1* Abstract Habitat transformation is one techniques (Urban & Keitt 2001; Dyer 2007; Rozenfeld et al. 2008; Bascompte 2009; Fortuna et al. 2009; Dale

Fortuna, Miguel A.

79

Governor's Distinguished CEBAF Professorship Awarded to JLab...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Governor's Distinguished CEBAF Professorship Awarded to JLab Chief Scientist May 2, 2005 Washington, D.C. - Five Virginia universities unanimously approved the nomination of...

80

Einstein's unpublished opening lecture for his course on relativity theory in Argentina, 1925  

E-Print Network [OSTI]

In 1922 the University of Buenos Aires (UBA) Council approved a motion to send an invitation to Albert Einstein to visit Argentina and give a course of lectures on his theory of relativity. The motion was proposed by Jorge Duclout (1856-1927), who had been educated at the Eidgenossische Technische Hochschule, Zurich (ETH). This proposal was the culmination of a series of initiatives of various Argentine intellectuals interested in the theory of relativity. In a very short time Dr. Mauricio Nirenstein (1877-1935), then the university's administrative secretary, fulfilled all the requirements for the university's invitation to be endorsed and delivered to the sage in Berlin. The visit took place three years later, in March-April 1925. The Argentine press received Einstein with great interest and respect; his early exchanges covered a wide range of topics, including international politics and Jewish matters. Naturally, the journalists were more eager to hear from the eminent pacifist than from the incomprehensible physicist. However, after his initial openness with the press, the situation changed and Einstein restricted his public discourse to topics on theoretical physics, avoiding some controversial political, religious, or philosophical matters that he had freely touched upon in earlier interviews.. [abridged].

Alejandro Gangui; Eduardo L. Ortiz

2009-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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81

MICHIGAN STATE UNIVERSITY DISTINGUISHED ALUMNI AWARD  

E-Print Network [OSTI]

MICHIGAN STATE UNIVERSITY DISTINGUISHED ALUMNI AWARD The MSU Alumni Association annually seeks and accepts nominations of alumni for the Michigan State University DISTINGUISHED ALUMNI AWARD. The selection the prestige of Michigan State University. RECIPIENT SELECTION CRITERIA · Must have a degree from Michigan

82

Ein Vergleich der Sinnbegriffe aus der Perspektive der Existenzphilosophie Albert Camus und der Sicht der Logotherapie und Existenzanalyse Viktor Frankls.  

E-Print Network [OSTI]

??Angestrebt wurde ein Vergleich der Sinngebegriffe aus der Perspektive der Existenzphilosophie Albert Camus' und der Sicht der Logotherapie und Existenzanalyse Viktor Frankls. Nach einer etymologischen… (more)

Bedenicec, Helena

2008-01-01T23:59:59.000Z

83

Le Déchirement et le Châtiment de Soi dans Épaves de Julien Green et la Chute d'Albert Camus.  

E-Print Network [OSTI]

?? This thesis explores how the paths of Julien Green and Albert Camus cross through Épaves and La Chute, when their characters question who they… (more)

Aggoun, Imene

2013-01-01T23:59:59.000Z

84

From Suicide, to Acceptance through Faith, and then, to Defiant Revolt: Existential Absurdism in Albert Camus' The Stranger.  

E-Print Network [OSTI]

??Thesis (M.A. – English Literature) This thesis examines the three stages of resolving the Absurd in existential Absurdism highlighted by Albert Camus in The Myth of… (more)

Henke, Daniel

2013-01-01T23:59:59.000Z

85

A literature of modern suffering : suffering in the work of Feodor Dostoevsky, Albert Camus and Milan Kundera.  

E-Print Network [OSTI]

??This thesis examines the treatment of the theme of suffering by three modern authors: Feodor Dostoevsky, Albert Camus, and Milan Kundera. The analysis proceeds through… (more)

Powell, Elisabeth

2007-01-01T23:59:59.000Z

86

`Access' report......................... 2 Distinguished lecture............. 3  

E-Print Network [OSTI]

Distinguished Service Award: Donna Allan is a "wonderful men- tor" to many women in transportation and to transit professionals, said Charles Zelle, CTS Executive Committee member. Allan, director of Mn

Minnesota, University of

87

Nanophotonic design principles for ultrahigh efficiency photovoltaics Harry Atwater, Albert Polman, Emily Kosten, Dennis Callahan, Pierpaolo Spinelli, Carissa Eisler, Matthew  

E-Print Network [OSTI]

Nanophotonic design principles for ultrahigh efficiency photovoltaics Harry Atwater, Albert Polman for ultrahigh efficiency photovoltaics Harry Atwater, 1,2 Albert Polman,2,1 , Emily Kosten, Dennis Callahan1 can enable ultrahigh efficiencies previously considered to be out of reach. Photovoltaic technology

Atwater, Harry

88

Demonstrating mesoscopic superpositions in double-well Bose-Einstein condensates  

E-Print Network [OSTI]

The availability of Bose-Einstein condensates as mesoscopic or macroscopic quantum objects has aroused new interest in the possiblity of making and detecting coherent superpositions involving many atoms. In this article we show that it may be possible to generate such a superposition state in a reasonably short time using Feshbach resonances to tune the inter-atomic interactions in a double-well condensate. We also consider the important problem of distinguishing whether a coherent superposition or a statistical mixture is generated by a given experimental procedure. We find that unambiguously distinguishing even a perfect `NOON' state from a statistical mixture using standard detection methods will present experimental difficulties.

T. J. Haigh; A. J. Ferris; M. K. Olsen

2009-07-08T23:59:59.000Z

89

An Econometrics Analysis of Freight Rail Demand Growth in Albert Wijeweera a, *  

E-Print Network [OSTI]

1 An Econometrics Analysis of Freight Rail Demand Growth in Australia Albert Wijeweera a, * , Hong of non-bulk freight demand in Australia. The paper uses a simple but robust econometrics method this growth at about four per cent per year (BTRE, 2006). The econometric model used herein enables us

90

Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey  

E-Print Network [OSTI]

Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey Tel : + 90 (216) 483 and Natural Sciences, Sabanci University, Istanbul, Turkey 2002 ­ 2007 Assistant Prof. of Computer Science and Engineering, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey 1999 ­2002 Post

Levi, Albert

91

Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey  

E-Print Network [OSTI]

Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey Tel : + 90 (216) 483 and Natural Sciences, Sabanci University, Istanbul, Turkey 2002 ­ 2007 Assistant Prof. of Computer Science and Engineering, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey 2001 ­ 2002

Levi, Albert

92

100 years of Einstein's theory of Brownian motion: from pollen grains to protein trains  

E-Print Network [OSTI]

Experimental verification of the theoretical predictions made by Albert Einstein in his paper, published in 1905, on the molecular mechanisms of Brownian motion established the existence of atoms. In the last 100 years discoveries of many facets of the ubiquitous Brownian motion has revolutionized our fundamental understanding of the role of {\\it thermal fluctuations} in the exotic structures and complex dynamics exhibited by soft matter like, for example, colloids, gels, etc. The domain of Brownian motion transcends the traditional disciplinary boundaries of physics and has become an area of multi-disciplinary research. Brownian motion finds applications also in earth and environmental sciences as well as life sciences. Nature exploits Brownian motion for running many dynamical processes that are crucial for sustaining life. In the first one-third of this article I present a brief historical survey of the initial period, including works of Brown and Einstein. In the next one-third I introduce the main concepts and the essential theoretical techniques used for studying translational as well as rotational Brownian motions and the effects of time-independent potentials. In the last one-third of this article I discuss some contemporary problems on Brownian motion in time-dependent potentials, namely, {\\it stochastic resonance} and {\\it Brownian ratchet}, two of the hottest topics in this area of interdisciplinary research.

Debashish Chowdhury

2005-04-24T23:59:59.000Z

93

Wigner distinguished lecturer Majumdar says scale-up factor key...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

speaks at ORNL's Wigner Distinguished Lecture Series. Arun Majumdar, vice president of energy at Google, speaks at ORNL's Wigner Distinguished Lecture Series. (hi-res image)...

94

Distinguished Engineering Graduate Outstanding Young Engineering Graduate  

E-Print Network [OSTI]

, or service delivery through the application of engineering principles; or · Contributed truly exceptional2013 Distinguished Engineering Graduate and Outstanding Young Engineering Graduate Award Nomination Form Print Form #12;The highest honor the Cockrell School of Engineering can bestow on one of its own

Lightsey, Glenn

95

Soil Properties That Distinguish Ecological Sites  

E-Print Network [OSTI]

Soil Properties That Distinguish Ecological Sites Mike Duniway USGS-Southwest Biological Science of vegetation? Why do sites differ in response to disturbance & management? #12;Ecological Sites & Soil Properties · Within a climatic zone (e.g. MLRA), differentiation of ecological sites based on soil

96

Conditional quantum distinguishability and pure quantum communication  

E-Print Network [OSTI]

I design a simple way of distinguishing non-orthogonal quantum states with perfect reliability using only quantum control-not gates in one condition. In this way, we can implement pure quantum communication in directly sending classical information, Ekert quantum cryptography and quantum teleportation without the help of classical communications channel.

Tian-Hai Zeng

2005-09-14T23:59:59.000Z

97

Distinguished Lecturer Series Understanding Climate Change  

E-Print Network [OSTI]

Distinguished Lecturer Series Understanding Climate Change: Opportunities and Challenges for Data A Climate change is the defining environmental challenge facing our planet, yet there is considerable.Anew and transformative approach is required to understand the potential impact of climate change. Data driven approaches

California at Davis, University of

98

Four-Photon (In)Distinguishability Transition  

E-Print Network [OSTI]

We demonstrate the conspiration of many-particle interferences of different degree to determine the transmission of four photons of tunable indistinguishability through a four-port beam splitter array. The probability of certain output events depends non-monotonically on the degree of distinguishability, due to distinct multi-particle interference contributions to the transmission signal.

Malte C. Tichy; Hyang-Tag Lim; Young-Sik Ra; Florian Mintert; Yoon-Ho Kim; Andreas Buchleitner

2011-03-14T23:59:59.000Z

99

Polymer Bose--Einstein Condensates  

E-Print Network [OSTI]

In this work we analyze a non--interacting one dimensional polymer Bose--Einstein condensate in an harmonic trap within the semiclassical approximation. We use an effective Hamiltonian coming from the polymer quantization that arises in loop quantum gravity. We calculate the number of particles in order to obtain the critical temperature. The Bose--Einstein functions are replaced by series, whose high order terms are related to powers of the polymer length. It is shown that the condensation temperature presents a shift respect to the standard case, for small values of the polymer scale. In typical experimental conditions, it is possible to establish a bound for $\\lambda^{2}$ up to $ \\lesssim 10 ^{-16}$m$^2$. To improve this bound we should decrease the frequency of the trap and also decrease the number of particles.

E. Castellanos; G. Chacon-Acosta

2013-01-22T23:59:59.000Z

100

Entropic corrections to Einstein equations  

SciTech Connect (OSTI)

Considering the general quantum corrections to the area law of black hole entropy and adopting the viewpoint that gravity interprets as an entropic force, we derive the modified forms of Modified Newtonian dynamics (MOND) theory of gravitation and Einstein field equations. As two special cases we study the logarithmic and power-law corrections to entropy and find the explicit form of the obtained modified equations.

Hendi, S. H. [Physics Department, College of Sciences, Yasouj University, Yasouj 75914 (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Sheykhi, A. [Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Department of Physics, Shahid Bahonar University, P.O. Box 76175-132, Kerman (Iran, Islamic Republic of)

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

LOCC Distinguishable Unentangled Orthonormal Bases are Generic  

E-Print Network [OSTI]

An orthonormal basis consisting of unentangled (pure tensor) elements in a tensor product of Hilbert spaces is an Unentangled Orthogonal Basis (UOB). Bennet et al, in their study of quantum nonlocality without entanglement, noted the lack of LOCC (local operations and classical communication) distinguishability for a specific $3$ qubit UOB. In general, for $n$ qubits, we prove that in its natural structure as a real variety, the space of UOB is a bouquet of products of Riemann spheres parametrized by a class of edge colorings of hypercubes. Its irreducible components of maximum dimension are products of $2^n-1$ two-spheres. Using a theorem of Walgate and Hardy, we observe that the LOCC distinguishable UOB are exactly those in the maximum dimensional components.

Jiri Lebl; Asif Shakeel; Nolan Wallach

2015-02-23T23:59:59.000Z

102

Schizophrenia: from phenomenology to neurobiology Albert Hung Choy Wonga,b,*, Hubert H.M. Van Tola,b,c  

E-Print Network [OSTI]

Review Schizophrenia: from phenomenology to neurobiology Albert Hung Choy Wonga,b,*, Hubert H to the phenomenology, pathology, treatment, genetics and neurobiology of schizophrenia. Although studied extensively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 2. Schizophrenia: phenomenology

Bruno, John P.

103

Einstein's Apple and Relativity's Gravitational Field  

E-Print Network [OSTI]

The foundations of Einstein's first (1907) principle of equivalence are explored and their consequences are stated in terms of invariance under generalized Lorentz transformations, first explored by Hessenberg.

Engelbert L. Schucking

2009-03-31T23:59:59.000Z

104

Albert-Ludwigs-Universitt Freiburg 3 Mi Tag der Deutschen Einheit  

E-Print Network [OSTI]

Albert-Ludwigs-Universität Freiburg Oktober 1 Mo 2 Di 3 Mi Tag der Deutschen Einheit 4 Do 5 Fr 6 Sa 7 So 8 Mo 9 Di 10 Mi 11 Do 12 Fr 13 Sa 14 So 15 Mo 16 Di 17 Mi 18 Do 19 Fr Erstsemesternachmittag 20 Sa 21 So 22 Mo Semesterbeginn WiSe 12/13 23 Di 24 Mi Eröffnung Akademisches Jahr 25 Do 26 Fr 27 Sa 28

Schindelhauer, Christian

105

Bose-Einstein condensate strings  

E-Print Network [OSTI]

We consider the possible existence of gravitationally bound general relativistic strings consisting of Bose-Einstein condensate (BEC) matter which is described, in the Newtonian limit, by the zero temperature time-dependent nonlinear Schr\\"odinger equation (the Gross-Pitaevskii equation), with repulsive interparticle interactions. In the Madelung representation of the wave function, the quantum dynamics of the condensate can be formulated in terms of the classical continuity equation and the hydrodynamic Euler equations. In the case of a condensate with quartic nonlinearity, the condensates can be described as a gas with two pressure terms, the interaction pressure, which is proportional to the square of the matter density, and the quantum pressure, which is without any classical analogue though, when the number of particles in the system is high enough, the latter may be neglected. By assuming cylindrical symmetry, we analyze the physical properties of the BEC strings in both the interaction pressure and quantum pressure dominated limits, by numerically integrating the gravitational field equations. In this way we obtain a large class of stable stringlike astrophysical objects, whose basic parameters (mass density and radius) depend sensitively on the mass and scattering length of the condensate particle, as well as on the quantum pressure of the Bose-Einstein gas.

Tiberiu Harko; Matthew J. Lake

2015-01-17T23:59:59.000Z

106

Experimental studies of Bose-Einstein condensation  

E-Print Network [OSTI]

of the condensate, and of its coherence properties. Ó1998 Optical Society of America OCIS codes: (020.0020) Atomic-Einstein Condensation of Lithium: Observation of Limited Condensate Number", Phys. Rev. Lett. 78, 985 (1997). 4. K. Ketterle, "Bose-Einstein condensation of a weakly-interacting gas", in Ultracold Atoms and Bose

Hart, Gus

107

Einstein Gravity from Conformal Gravity  

E-Print Network [OSTI]

We show that that four dimensional conformal gravity plus a simple Neumann boundary condition can be used to get the semiclassical (or tree level) wavefunction of the universe of four dimensional asymptotically de-Sitter or Euclidean anti-de Sitter spacetimes. This simple Neumann boundary condition selects the Einstein solution out of the more numerous solutions of conformal gravity. It thus removes the ghosts of conformal gravity from this computation. In the case of a five dimensional pure gravity theory with a positive cosmological constant we show that the late time superhorizon tree level probability measure, $|\\Psi [ g ]|^2$, for its four dimensional spatial slices is given by the action of Euclidean four dimensional conformal gravity.

Juan Maldacena

2011-06-09T23:59:59.000Z

108

California Policy Should Distinguish Biofuels by Differential Global Warming Effects  

E-Print Network [OSTI]

California Policy Should Distinguish Biofuels by Differential Global Warming Effects by Richard J: _______________________________________ Date #12;California Policy Should Distinguish Biofuels by Differential Global Warming Effects Richard J, 2006 #12;#12;ABSTRACT California Policy Should Distinguish Biofuels by Differential Global Warming

Kammen, Daniel M.

109

Chemistry and Engineering News Volume 90 Issue 7 | February 13, 2012 | pp. 48-49 | F. Albert Cotton Award In Synthetic Inorganic Chemistry  

E-Print Network [OSTI]

Chemistry and Engineering News Volume 90 Issue 7 | February 13, 2012 | pp. 48-49 | Awards F. Albert Cotton Award In Synthetic Inorganic Chemistry By Sophie Rovner Department: ACS News Keywords: inorganic chemistry, Christopher Reed Awards Reed Credit: Courtesy of Christopher A. Reed Sponsored by the F. Albert

Reed, Christopher A.

110

The modification of Einstein`s gravitational field equation following from the energy conservation law  

E-Print Network [OSTI]

The cause of an infringement in GR of a gravitational field energy conservation law is investigated . The equation of a gravitational field not contradicting to the energy conservation law is suggested. This equation satisfy to the Einstein,s requirement of equivalence of all energy kinds as sources of a gravitational field. This equation is solved in paper for cosmic objects. It is showed, that results for some objects - for black holes and gravitating strings-essentialy differ from such for Einstein,s equation, have the symple meaning and do not contradictions.

Roald Sosnovskiy

2009-01-16T23:59:59.000Z

111

Quantum reflection of Bose-Einstein Condensates  

E-Print Network [OSTI]

Recent developments in atom optics have brought Bose-Einstein condensates within 1 pm of solid surfaces where the atom-surface interactions can no longer be ignored. At long- range, the atom-surface interaction is described ...

Pasquini, Thomas A., Jr

2007-01-01T23:59:59.000Z

112

Causality in scalar-Einstein waves  

E-Print Network [OSTI]

A wavelike scalar-Einstein solution is found and indicating vectors constructed from the Bel-Robinson tensor are used to study which objects co-move with the wave and whether gravitational energy transfer is null.

Mark D. Roberts

2015-03-13T23:59:59.000Z

113

Einstein's Energy-Free Gravitational Field  

E-Print Network [OSTI]

We show that Einstein's gravitational field has zero energy, momentum, and stress. This conclusion follows directly from the gravitational field equations, in conjunction with the differential law of energy-momentum conservation $ T^{\\mu\

Kenneth Dalton

1998-03-13T23:59:59.000Z

114

Einstein's Apple: His First Principle of Equivalence  

E-Print Network [OSTI]

After a historical discussion of Einstein's 1907 principle of equivalence, a homogeneous gravitational field in Minkowski spacetime is constructed. It is pointed out that the reference frames in gravitational theory can be understood as spaces with a flat connection and torsion defined through teleparallelism. This kind of torsion was introduced by Einstein in 1928. The concept of torsion is discussed through simple examples and some historical observations.

Engelbert L. Schucking; Eugene J. Surowitz

2012-08-09T23:59:59.000Z

115

Einstein's Biggest Blunder: A Cosmic Mystery Story  

ScienceCinema (OSTI)

The standard model of cosmology built up over 20 years is no longer accepted as accurate. New data suggest that most of the energy density of the universe may be contained in empty space. Remarkably, this is exactly what would be expected if Einstein's cosmological constant really exists. If it does, its origin is the biggest mystery in physics and presents huge challenges for the fundamental theories of elementary particles and fields. Krauss explains Einstein's concept and describes its possible implications.

Lawrence Krauss

2010-09-01T23:59:59.000Z

116

Finding new signature effects on galactic dynamics to constrain Bose-Einstein-condensed cold dark matter  

E-Print Network [OSTI]

If cosmological cold dark matter (CDM) consists of light enough bosonic particles that their phase-space density exceeds unity, they will comprise a Bose-Einstein condensate (BEC). The nature of this BEC-CDM as a quantum fluid may then distinguish it dynamically from the standard form of CDM involving a collisionless gas of non-relativistic particles that interact purely gravitationally. We summarize some of the dynamical properties of BEC-CDM that may lead to observable signatures in galactic halos and present some of the bounds on particle mass and self-interaction coupling strength that result from a comparison with observed galaxies.

Tanja Rindler-Daller; Paul R. Shapiro

2014-04-17T23:59:59.000Z

117

Wave turbulence and Bose-Einstein condensates Fluctuations turbulentes dans les condensats de Bose-Einstein  

E-Print Network [OSTI]

Wave turbulence and Bose-Einstein condensates Fluctuations turbulentes dans les condensats de Bose-Einstein condensates are considered. A statistical approach is presented following[1] to describe the stationary regime shows rapid oscillation of the condensate. R#19;esum#19;e Le comportement asymptotique des

118

Building trees based on aggregation efficiency in sensor networks Albert F. Harris III a,*, Robin Kravets b  

E-Print Network [OSTI]

-mail addresses: harris@dei.unipd.it (A.F. Harris III), rhk@cs.uiuc.edu (R. Kravets), indy@cs.uiuc.edu (I. GuptaBuilding trees based on aggregation efficiency in sensor networks Albert F. Harris III a,*, Robin 2007 Elsevier B.V. All rights reserved. doi:10.1016/j.adhoc.2007.02.021 * Corresponding author. E

Kravets, Robin

119

How smooth is the smoothest function in a given refinable space? Albert Cohen, Ingrid Daubechies, Amos Ron  

E-Print Network [OSTI]

of wavelets from multiresolution analysis, as well as in the study of subdivision algorithms is well are the univariate splines and the multivariate box splines (cf. [2]), and for these spline spaces the rigidHow smooth is the smoothest function in a given refinable space? Albert Cohen, Ingrid Daubechies

Ron, Amos

120

How smooth is the smoothest function in a given refinable space? Albert Cohen, Ingrid Daubechies, Amos Ron  

E-Print Network [OSTI]

analysis, as well as in the study of subdivision algorithms is well-known, well-understood and well of such spaces are the univariate splines and the multivariate box splines (cf. [2]), and for these spline spacesHow smooth is the smoothest function in a given refinable space? Albert Cohen, Ingrid Daubechies

Liblit, Ben

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
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121

Islanded house operation using a micro CHP Albert Molderink, Vincent Bakker, Johann L. Hurink, Gerard J.M. Smit  

E-Print Network [OSTI]

1 Islanded house operation using a micro CHP Albert Molderink, Vincent Bakker, Johann L. Hurink, The Netherlands email: a.molderink@utwente.nl Abstract-- The µCHP is expected as the successor of the conventional. A µCHP appliance saves money and reduces greenhouse gas emission. An additional functionality of the µCHP

Al Hanbali, Ahmad

122

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff: In 2004, this award was called the Chancellor's Medal for Distinguished Contribution to the University Mr

Botea, Adi

123

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff: In 2004, this award was called the Chancellor's Medal for Distinguished Contribution to the University

Botea, Adi

124

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff's distinguished service to the University, in particular, his outstanding contribution to the establishment

Botea, Adi

125

NOMINATION FORM 2010 Distinguished Texan in Agriculture Award  

E-Print Network [OSTI]

NOMINATION FORM 2010 Distinguished Texan in Agriculture Award Texas A&M AgriLife The Texas A/her contributions on behalf of the Texas agricultural industry and community (information may be submitted:__________________________________________________________ ________________________________________________________________________ RETURN NOMINATIONS TO 2010 Distinguished Texan in Agriculture Selection Advisory Committee c/o Office

126

Comment on "Scalar Einstein-Aether theory"  

E-Print Network [OSTI]

A recent paper studies a modification of Einstein-aether theory in which the aether vector is restricted, at the level of the action, to be the gradient of a scalar. In this comment we note that this scalar version of Einstein-aether theory is equivalent to the projectable version of the IR limit of Ho\\v{r}ava gravity when the potential for the scalar is constant. This provides a generally covariant formulation for projectable Ho\\v{r}ava gravity.

Ted Jacobson; Antony J. Speranza

2014-06-12T23:59:59.000Z

127

Bose-Einstein condensation: Twenty years after  

E-Print Network [OSTI]

The aim of this introductory article is two-fold. First, we aim to offer a general introduction to the theme of Bose-Einstein condensates, and briefly discuss the evolution of a number of relevant research directions during the last two decades. Second, we introduce and present the articles that appear in this Special Volume of Romanian Reports in Physics celebrating the conclusion of the second decade since the experimental creation of Bose-Einstein condensation in ultracold gases of alkali-metal atoms.

Bagnato, V S; Kevrekidis, P G; Malomed, B A; Mihalache, D

2015-01-01T23:59:59.000Z

128

??Rubidium Bose-Einstein condensates in optical lattices  

E-Print Network [OSTI]

Bose-Einstein condensates in optical lattices have proven to be a powerful tool for studying a wide variety of physics. In this thesis a series of experiments using optical lattices to manipulate 87Rb Bose-Einstein condensates ...

Campbell, Gretchen K. (Gretchen Kathleen)

2007-01-01T23:59:59.000Z

129

Buffer-Gas Cooled Bose-Einstein Condensate  

E-Print Network [OSTI]

We report the creation of a Bose-Einstein condensate using buffer-gas cooling, the first realization of Bose-Einstein condensation using a broadly general method which relies neither on laser cooling nor unique atom-surface ...

Ketterle, Wolfgang

130

BoseEinstein Condensation of Atomic Hydrogen Dale G. Fried  

E-Print Network [OSTI]

Bose­Einstein Condensation of Atomic Hydrogen by Dale G. Fried B.S. Physics Washington State by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thomas J. Greytak Chairman, Department of Physics Graduate Committee #12; #12; Bose­Einstein Condensation the observation and study of Bose­Einstein condensation (BEC) of magnetically trapped atomic hydrogen. The sample

131

Microtraps and Waveguides for Bose-Einstein Condensates  

E-Print Network [OSTI]

Microtraps and Waveguides for Bose-Einstein Condensates by Aaron E. Leanhardt Submitted and Waveguides for Bose-Einstein Condensates by Aaron E. Leanhardt Submitted to the Department of Physics Abstract Gaseous Bose-Einstein condensates containing up to 3 Ã? 106 23 Na atoms were loaded into magnetic

132

Manipulating Bose-Einstein condensates with laser light Shin Inouye  

E-Print Network [OSTI]

Manipulating Bose-Einstein condensates with laser light by Shin Inouye Submitted to the Department-Einstein condensates with laser light by Shin Inouye Submitted to the Department of Physics on June 7, 2001, in partial-Einstein condensate was probed and manipulated by off-resonant laser beams. Spontaneous and stimulated off

133

Chromohydrodynamics in Einstein-Cartan theory  

SciTech Connect (OSTI)

The complete dynamical system for a classical fluid endowed with non-Abelian charge density is obtained by using variational techniques. Spin density appears in a natural way, as a consequence of a usual gauge construction. Einstein-Cartan, Yang-Mills, and generalized Wong equations are explicitly shown.

Amorim, R.

1986-05-15T23:59:59.000Z

134

Einstein-aether gravity: a status report  

E-Print Network [OSTI]

This paper reviews the theory, phenomenology, and observational constraints on the coupling parameters of Einstein-aether gravity, i.e. General Relativity coupled to a dynamical unit timelike vector field. A discussion of open questions concerning both phenomenology and fundamental issues is included.

Ted Jacobson

2008-03-09T23:59:59.000Z

135

Infrared fixed point in quantum Einstein gravity  

E-Print Network [OSTI]

We performed the renormalization group analysis of the quantum Einstein gravity in the deep infrared regime for different types of extensions of the model. It is shown that an attractive infrared point exists in the broken symmetric phase of the model. It is also shown that due to the Gaussian fixed point the IR critical exponent $\

S. Nagy; J. Krizsan; K. Sailer

2012-06-28T23:59:59.000Z

136

Dynamics of Bose-Einstein Condensates  

E-Print Network [OSTI]

We report on some recent results concerning the dynamics of Bose-Einstein condensates, obtained in a series of joint papers with L. Erdos and H.-T. Yau. Starting from many body quantum dynamics, we present a rigorous derivation of a cubic nonlinear Schroedinger equation known as the Gross-Pitaevskii equation for the time evolution of the condensate wave function.

Benjamin Schlein

2007-04-05T23:59:59.000Z

137

UNITED STATES DEPAR'rMENT OF THE INTERIOR, OSCAR L. CHAPMAN, Secretary FISH AND WILDLIFE SERVICE, ALBERT M. DAY, Director  

E-Print Network [OSTI]

, ALBERT M. DAY, Director JUVENILE FORMS OF NEOTHUNNUS MACROPTERUS, KATSUWONUS PELAMIS AND EUTHYNNUS Y Al and Schlegel)__________________ 395 Katsuwonus pelamis (Linnaeus _ _ _ _ _ _ _ _ _ _ _ 404 #12;JUVENILE FORMS OF NEOTHUNNUS MACROPTERUS, KATSUWONUS PELAMIS, AND EUTHYNNUS YAlTO FROM

138

MIMO ARQ Systems with Multi-Level Feedback Khoa D. Nguyen Lars K. Rasmussen Albert Guillen i F`abregas Nick Letzepis  

E-Print Network [OSTI]

, University of Cambridge, Cambridge CB2 1PZ, UK dangkhoa.nguyen@postgrads.unisa.edu.au; lars.rasmussenMIMO ARQ Systems with Multi-Level Feedback Khoa D. Nguyen Lars K. Rasmussen Albert Guill´en i F

Guillén i Fàbregas, Albert

139

Distinguishable patterns of competition, collusion, and parallel action  

E-Print Network [OSTI]

Alternative market structures are distinguishable by the degree of parallel action exhibited by producers. We show that the correlation between output levels varies systematically with the degree of interdependence among ...

Smith, James L.

2003-01-01T23:59:59.000Z

140

Allosteric networks in thrombin distinguish procoagulant vs. anticoagulant activities  

E-Print Network [OSTI]

Allosteric networks in thrombin distinguish procoagulant vs. anticoagulant activities Paul M elected in 2011. Contributed by J. Andrew McCammon, October 29, 2012 (sent for review September 24, 2012

Komives, Elizabeth A.

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

2010 Society of Petroleum Engineers John Franklin Carll Distinguished  

E-Print Network [OSTI]

Smart Oilfield Technologies (CiSofT) #12;Olin Hall 500 Los Angeles CA 90089-1451 http Distinguished Service Award in 2005 and the Technology Trans- fer Award for Development of the Smart Oilfield

Zhou, Chongwu

142

Axions: Bose Einstein Condensate or Classical Field?  

E-Print Network [OSTI]

The axion is a motivated dark matter candidate, so it would be interesting to find features in Large Scale Structures specific to axion dark matter. Such features were proposed for a Bose Einstein condensate of axions, leading to confusion in the literature (to which I contributed) about whether axions condense due to their gravitational interactions. This note argues that the Bose Einstein condensation of axions is a red herring: the axion dark matter produced by the misalignment mechanism is already a classical field, which has the distinctive features attributed to the axion condensate (BE condensates are described as classical fields). This note also estimates that the rate at which axion particles condense to the field, or the field evaporates to particles, is negligeable.

Sacha Davidson

2014-12-20T23:59:59.000Z

143

Nonlinear cosmological power spectra in Einstein's gravity  

E-Print Network [OSTI]

Is Newton's gravity sufficient to handle the weakly nonlinear evolution stages of the cosmic large-scale structures? Here we resolve the issue by analytically deriving the density and velocity power spectra to the second order in the context of Einstein's gravity. The recently found pure general relativistic corrections appearing in the third-order perturbation contribute to power spectra to the second order. In this work the complete density and velocity power spectra to the second order are derived. The power transfers among different scales in the density power spectrum are estimated in the context of Einstein's gravity. The relativistic corrections in the density power spectrum are estimated to be smaller than the Newtonian one to the second order, but these could be larger than higher-order nonlinear Newtonian terms.

Hyerim Noh; Jai-chan Hwang

2008-05-13T23:59:59.000Z

144

Relativistic Bose-Einstein condensation with disorder  

E-Print Network [OSTI]

We investigate the thermodynamics of a self-interacting relativistic charged scalar field in the presence of weak disorder. We consider quenched disorder which couples linearly to the mass of the scalar field. After performing noise averages over the free energy of the system, we find that disorder increases the mean-field critical temperature for Bose-Einstein condensation at finite density. The effect of disorder on the temperature dependence of the chemical potential for a fixed charge density is investigated. Significant differences from the mean-field temperature dependence of the chemical potential are observed as the strength of the noise intensity increases. Finally, the temperature dependence of the chemical potential with fixed total charge and entropy is investigated. It is found that there is no Bose-Einstein condensation for a fixed charge to entropy ratio in the presence of weak disorder. The possible relevance of the findings in the present paper in different areas is discussed.

E. Arias; G. Krein; G. Menezes; N. F. Svaiter

2014-10-26T23:59:59.000Z

145

Embeddings for solutions of Einstein equations  

E-Print Network [OSTI]

We study isometric embeddings of some solutions of the Einstein equations with suffciently high symmetries into a flat ambient space. We briefly describe a method for constructing surfaces with a given symmetry. We discuss all minimal embeddings of the Schwarzschild metric obtained using this method and show how the method can be used to construct all minimal embeddings for the Friedmann models. We classify all the embeddings in terms of realizations of symmetries of the corresponding solutions.

S. A. Paston; A. A. Sheykin

2013-06-20T23:59:59.000Z

146

Cosmic Axion Bose-Einstein Condensation  

E-Print Network [OSTI]

QCD axions are a well-motivated candidate for cold dark matter. Cold axions are produced in the early universe by vacuum realignment, axion string decay and axion domain wall decay. We show that cold axions thermalize via their gravitational self-interactions, and form a Bose-Einstein condensate. As a result, axion dark matter behaves differently from the other proposed forms of dark matter. The differences are observable.

Banik, Nilanjan

2015-01-01T23:59:59.000Z

147

Extended Horava gravity and Einstein-aether theory  

E-Print Network [OSTI]

Einstein-aether theory is general relativity coupled to a dynamical, unit timelike vector. If this vector is restricted in the action to be hypersurface orthogonal, the theory is identical to the IR limit of the extension of Horava gravity proposed by Blas, Pujol\\`{a}s and Sibiryakov. Hypersurface orthogonal solutions of Einstein-aether theory are solutions to the IR limit of this theory, hence numerous results already obtained for Einstein-aether theory carry over.

Ted Jacobson

2010-11-11T23:59:59.000Z

148

Extended Horava gravity and Einstein-aether theory  

SciTech Connect (OSTI)

Einstein-aether theory is general relativity coupled to a dynamical, unit timelike vector. If this vector is restricted in the action to be hypersurface orthogonal, the theory is identical to the IR limit of the extension of Horava gravity proposed by Blas, Pujolas and Sibiryakov. Hypersurface orthogonal solutions of Einstein-aether theory are solutions to the IR limit of this theory, hence numerous results already obtained for Einstein-aether theory carry over.

Jacobson, Ted [Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742-4111 (United States)

2010-05-15T23:59:59.000Z

149

Fall Lectures Feature Life of Einstein; Exploring Our World With...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fall Lectures Feature Life of Einstein; Exploring Our World With Particle Accelerators NEWPORT NEWS, Va., Sept. 22, 2010 - Jefferson Lab's first 2010 Fall Science Series lecture,...

150

E-Print Network 3.0 - analysis distinguishes phases Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(SMS). MPS are very general, since their phases can be distinguished along... that the marking includes enough information to distinguish ... Source: Firenze, Universit degli...

151

NORTHERN ILLINOIS UNIVERSITY Distinguished NanoScience Fellowship Application  

E-Print Network [OSTI]

NORTHERN ILLINOIS UNIVERSITY Distinguished NanoScience Fellowship Application Students should submit this form to the Nanoscience Fellowship Committee by the applicant advisor. Attach a brief summary of your performed and proposed research in nanoscience, together with a resume or curriculum vitae (if

Kostic, Milivoje M.

152

Distinguishing between interference and exploitation competition for shelter in a  

E-Print Network [OSTI]

Distinguishing between interference and exploitation competition for shelter in a mobile fish) as a model system of mobile fish to investigate the effect of intraspecific competition on shelter use and population density. For each experiment the location of each individual fish was observed over a period of 10

Jones, Owen

153

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff at the Centre for Mental Health Research, Ms Korten made a major contribution to the field of psychiatric

Botea, Adi

154

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff contributions to the understanding of Austronesian languages of the Asia- Pacific region. He has received

Botea, Adi

155

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff. As his reputation and expertise grew, Professor Fox's contribution to the University also grew

Botea, Adi

156

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff. He is recognised internationally for his sustained and prolific contributions in the areas of history

Botea, Adi

157

MIT Center for Transportation & Logistics Distinguished Speakers Series  

E-Print Network [OSTI]

MIT Center for Transportation & Logistics Distinguished Speakers Series Richard A. Davey MBTA;Transportation Reform ­ Moving Forward Transportation Reform Governance & Oversight · MBTA Board reconfigured mirroring the MassDOT's Five (5) member Board. · MBTA remains a separate legal entity from MassDOT. · MBTA

Entekhabi, Dara

158

Distinguishing between Dirac and Majorana neutrinos withtwo-particle interferometry  

SciTech Connect (OSTI)

Two-particle interferometry, a second-order interferenceeffect, is explored as another possible tool to distinguish betweenmassive Dirac and Majorana neutrinos. A simple theoretical framework isdiscussed in the context of several gedanken experiments. The method canin principle provide both the mass scale and the quantum nature of theneutrino for a certain class of incoherent left-handed sourcecurrents.

Gutierrez, Thomas D.

2006-03-02T23:59:59.000Z

159

Cardiff University Distinguished Lecture Symposium Advances in Solar Energy  

E-Print Network [OSTI]

Cardiff University Distinguished Lecture Symposium Advances in Solar Energy Thursday 22nd March prospects for inorganic thin film photovoltaic solar cells for large scale energy generation 2:55 Dr Emyr:50 Professor James Durrant (Imperial College London, England) Photochemical approaches to solar energy

Martin, Ralph R.

160

Bose-Einstein Condensate general relativistic stars  

E-Print Network [OSTI]

We analyze the possibility that due to their superfluid properties some compact astrophysical objects may contain a significant part of their matter in the form of a Bose-Einstein condensate. To study the condensate we use the Gross-Pitaevskii equation, with arbitrary non-linearity. By introducing the Madelung representation of the wave function, we formulate the dynamics of the system in terms of the continuity equation and of the hydrodynamic Euler equations. The non-relativistic and Newtonian Bose-Einstein gravitational condensate can be described as a gas, whose density and pressure are related by a barotropic equation of state. In the case of a condensate with quartic non-linearity, the equation of state is polytropic with index one. In the framework of the Thomas-Fermi approximation the structure of the Newtonian gravitational condensate is described by the Lane-Emden equation, which can be exactly solved. The case of the rotating condensate is also discussed. General relativistic configurations with quartic non-linearity are studied numerically with both non-relativistic and relativistic equations of state, and the maximum mass of the stable configuration is determined. Condensates with particle masses of the order of two neutron masses (Cooper pair) and scattering length of the order of 10-20 fm have maximum masses of the order of 2 M_sun, maximum central density of the order of 0.1-0.3 10^16 g/cm^3 and minimum radii in the range of 10-20 km. In this way we obtain a large class of stable astrophysical objects, whose basic astrophysical parameters (mass and radius) sensitively depend on the mass of the condensed particle, and on the scattering length. We also propose that the recently observed neutron stars with masses in the range of 2-2.4 M_sun are Bose-Einstein Condensate stars.

P. H. Chavanis; T. Harko

2011-08-19T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Bose-Einstein condensation on quantum graphs  

E-Print Network [OSTI]

We present results on Bose-Einstein condensation (BEC) on general compact quantum graphs, i.e., one-dimensional systems with a (potentially) complex topology. We first investigate non-interacting many-particle systems and provide a complete classification of systems that exhibit condensation. We then consider models with interactions that consist of a singular part as well as a hardcore part. In this way we obtain generalisations of the Tonks-Girardeau gas to graphs. For this we find an absence of phase transitions which then indicates an absence of BEC.

Jens Bolte; Joachim Kerner

2014-03-02T23:59:59.000Z

162

Multimessenger astronomy with the Einstein Telescope  

E-Print Network [OSTI]

Gravitational waves (GWs) are expected to play a crucial role in the development of multimessenger astrophysics. The combination of GW observations with other astrophysical triggers, such as from gamma-ray and X-ray satellites, optical/radio telescopes, and neutrino detectors allows us to decipher science that would otherwise be inaccessible. In this paper, we provide a broad review from the multimessenger perspective of the science reach offered by the third generation interferometric GW detectors and by the Einstein Telescope (ET) in particular. We focus on cosmic transients, and base our estimates on the results obtained by ET's predecessors GEO, LIGO, and Virgo.

Eric Chassande-Mottin; Martin Hendry; Patrick J. Sutton; Szabolcs Márka

2010-04-12T23:59:59.000Z

163

Entangled light from Bose-Einstein condensates  

E-Print Network [OSTI]

We propose a method to generate entangled light with a Bose-Einstein condensate trapped in a cavity, a system realized in recent experiments. The atoms of the condensate are trapped in a periodic potential generated by a cavity mode. The condensate is continuously pumped by a laser and spontaneously emits a pair of photons of different frequencies in two distinct cavity modes. In this way, the condensate mediates entanglement between two cavity modes which leak out and can be separated and exhibit continuous variable entanglement. The scheme exploits the experimentally demonstrated strong, steady and collective coupling of condensate atoms to a cavity field.

H. T. Ng; S. Bose

2008-09-30T23:59:59.000Z

164

Rydberg excitation of Bose-Einstein condensates  

E-Print Network [OSTI]

Rydberg atoms provide a wide range of possibilities to tailor interactions in a quantum gas. Here we report on Rydberg excitation of Bose-Einstein condensed 87Rb atoms. The Rydberg fraction was investigated for various excitation times and temperatures above and below the condensation temperature. The excitation is locally blocked by the van der Waals interaction between Rydberg atoms to a density-dependent limit. Therefore the abrupt change of the thermal atomic density distribution to the characteristic bimodal distribution upon condensation could be observed in the Rydberg fraction. The observed features are reproduced by a simulation based on local collective Rydberg excitations.

Rolf Heidemann; Ulrich Raitzsch; Vera Bendkowsky; Björn Butscher; Robert Löw; Tilman Pfau

2007-10-30T23:59:59.000Z

165

Dynamics of Bose-Einstein Condensates Benjamin Schlein  

E-Print Network [OSTI]

Dynamics of Bose-Einstein Condensates Benjamin Schlein Department of Mathematics, University the dynamics of Bose-Einstein condensates, ob- tained in a series of joint papers [5, 6] with L. Erdos and H Schr¨odinger equation known as the Gross-Pitaevskii equation for the time evolution of the condensate

166

DISORDERED BOSE EINSTEIN CONDENSATES WITH INTERACTION IN ONE DIMENSION  

E-Print Network [OSTI]

DISORDERED BOSE EINSTEIN CONDENSATES WITH INTERACTION IN ONE DIMENSION ROBERT SEIRINGER, JAKOB- Pitaevskii regime. We prove that Bose Einstein condensation survives even a strong random potential with a high density of scatterers. The character of the wave func- tion of the condensate, however, depends

Boyer, Edmond

167

Static Solutions of Einstein's Equations with Spherical Symmetry  

E-Print Network [OSTI]

The Schwarzschild solution is a complete solution of Einstein's field equations for a static spherically symmetric field. The Einstein's field equations solutions appear in the literature, but in different ways corresponding to different definitions of the radial coordinate. We attempt to compare them to the solutions with nonvanishing energy density and pressure. We also calculate some special cases with changes in spherical symmetry.

Iftikhar Ahmad; Maqsoom Fatima; Najam-ul-Basat

2014-05-02T23:59:59.000Z

168

k-Boson Quantum Walks Do Not Distinguish Arbitrary Graphs  

E-Print Network [OSTI]

In this paper, we define k-equivalence, a relation on graphs that relies on their associated cellular algebras. We show that a k-Boson quantum walk cannot distinguish pairs of graphs that are k- equivalent. The existence of pairs of k-equivalent graphs has been shown by Ponomarenko et al. [2, 6]. This gives a negative answer to a question posed by Gamble et al. [7].

Jamie Smith

2010-04-01T23:59:59.000Z

169

Neutron stars in Einstein-aether theory  

E-Print Network [OSTI]

As current and future experiments probe strong gravitational regimes around neutron stars and black holes, it is desirable to have theoretically sound alternatives to general relativity against which to test observations. Here we study the consequences of one such generalization, Einstein-aether theory, for the properties of non-rotating neutron stars. This theory has a parameter range that satisfies all current weak-field tests. We find that within this range it leads to lower maximum neutron star masses, as well as larger surface redshifts at a particular mass, for a given nuclear equation of state. For non-rotating black holes and neutron stars, the innermost stable circular orbit is only slightly modified in this theory.

Christopher Eling; Ted Jacobson; M. Coleman Miller

2009-12-06T23:59:59.000Z

170

Energy in the Einstein-Aether Theory  

E-Print Network [OSTI]

We investigate the energy of a theory with a unit vector field (the "aether") coupled to gravity. Both the Weinberg and Einstein type energy-momentum pseudotensors are employed. In the linearized theory we find expressions for the energy density of the 5 wave modes. The requirement that the modes have positive energy is then used to constrain the theory. In the fully non-linear theory we compute the total energy of an asymptotically flat spacetime. The resulting energy expression is modified by the presence of the aether due to the non-zero value of the unit vector at infinity and its 1/r falloff. The question of non-linear energy positivity is also discussed, but not resolved.

Christopher Eling

2009-12-06T23:59:59.000Z

171

Bose-Einstein Condensation on Holographic Screens  

E-Print Network [OSTI]

We consider a boson gas on holographic screens of the Rindler and Schwartzschild spacetimes. It is shown that the gas on the stretched horizon is in a Bose-Einstein condensed state with the Hawking temperature $T_c=T_H$ if the particle number of the system be equal to the number of quantum bits of spacetime $ N \\simeq {A}/{{\\l_{p}}^{2}}$. A boson gas on a holographic screen $(r>2M)$ with the same number of particles and at Unruh temperature is also in a condensed state. Far from the horizon, the Unruh temperature is much lower than the condensation temperature $(T_c=T_{{Unruh}}+\\sqrt {f(r)} T_{Planck})$. This analysis implies a possible physical model for quantum bits of spacetime on a holographic screen. We propose a unique and physical interpretation for equipartition theorem on holographic screens. Also, we will argue that this gas is a fast scrambler.

Mirza, Behrouz; Raissi, Zahra

2011-01-01T23:59:59.000Z

172

Chaoticity and Coherence in Bose-Einstein Condensation and Correlations  

E-Print Network [OSTI]

We review the properties of chaoticity and coherence in Bose-Einstein condensation and correlations, for a dense boson system in its mean-field represented approximately by a harmonic oscillator potential. The order parameter and the nature of the phase transition from the chaotic to the condensate states are studied for different fixed numbers of bosons. The two-particle correlation function in momentum space is calculated to investigate how the Bose-Einstein correlation depends on the degree of condensation and other momentum variables. We generalize the Bose-Einstein correlation analysis to three-particle correlations to show its dependence on the degree of condensation.

Cheuk-Yin Wong; Wei-Ning Zhang; Jie Liu; Peng Ru

2015-01-23T23:59:59.000Z

173

The magnetic dipole interaction in Einstein-Maxwell theory  

E-Print Network [OSTI]

I derive an exact, static, axially symmetric solution of the Einstein-Maxwell equations representing two massless magnetic dipoles, and compare it with the corresponding solution of Einstein's equations for two massless spinning particles (see gr-qc/0201094). I then obtain an exact stationary solution of the Einstein-Maxwell equations representing two massless spinning magnets in balance. The conclusion is that the spin-spin force is analogous to the force between two magnetic dipoles, but of opposite sign, and that the latter agrees with the classical value in the first approximation.

W. B. Bonnor

2002-03-13T23:59:59.000Z

174

Back-reaction of Quantum fields in an Einstein Universe  

E-Print Network [OSTI]

We study the back-reaction effects of the finite-temperature scalar field and the photon field in the background of an Einstein universe. In each case we find a relation between the temperature of the universe and its radius. These relations exhibit a minimum radius below which no self-consistent solution for the Einstein field equation can be found. A maximum temperature marks the transition from the vacuum dominated era to the radiation dominated era. An interpretation to this behavior in terms of Bose-Einstein condensation in the case of the scalar field is given.

M. B. Altaie

2001-04-30T23:59:59.000Z

175

United states Department of the Interior, J. A. Krug, Secretary Fish and 1~~ildlife Service, Albert M. Day, Director  

E-Print Network [OSTI]

, Albert M. Day, Director Fishery Leaflet 287 rVaShington 25, D. c. May, 194 PER CAPITA CONSUMPTION OF FISH and consumed direct by the fishermen, amounts to about 1,645,000, 000 pounds or a per capita consumption half a pound t o t he per capita consumption. Among these, salmon l eads "li t h 2. 738 pounds . Follo

176

Ground states and dynamics of multi-component Bose-Einstein condensates  

E-Print Network [OSTI]

Ground states and dynamics of multi-component Bose-Einstein condensates Weizhu Bao #3; Department) an external driven #12;eld for dynamics describing a multi-component Bose- Einstein condensate (BEC) at zero-component Bose-Einstein condensates. Key Words. Multi-component, Bose-Einstein condensate (BEC), Vector Gross

Markowich, Peter A.

177

On distinguishing trees by their chromatic symmetric functions  

E-Print Network [OSTI]

solution will play a role in the proof. Letm1, . . . ,mk be nonnegative integers with ?mi = `. Suppose that we have ` distinguishable boxes, of which mi have capacity i for each i ? [k]. Let ?(m1, . . . ,mk) be the number of ways of distributing k... indistinguishable balls among these boxes so that no box is filled beyond its capacity. In general, it is not easy to write down a closed formula for ?(m1, . . . ,mk), although individual instances can be computed using an inclusion-exclusion argument (for example...

Martin, Jeremy L.; Morin, Matthew; Wagner, Jennifer D.

2008-02-01T23:59:59.000Z

178

Tomé wins Distinguished Scientist, Engineer Award  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 andThe1A:decisional. 1 B OTomTomé wins Distinguished

179

Einstein-aether gravity: theory and observational constraints  

E-Print Network [OSTI]

Einstein-aether theory is general relativity coupled to a dynamical unit timelike vector field. A brief review of current theoretical understanding and observational constraints on the four coupling parameters of the theory is given.

Ted Jacobson

2007-11-24T23:59:59.000Z

180

Thermodynamics of Spacetime: The Einstein Equation of State  

E-Print Network [OSTI]

The Einstein equation is derived from the proportionality of entropy and horizon area together with the fundamental relation $\\delta Q=TdS$ connecting heat, entropy, and temperature. The key idea is to demand that this relation hold for all the local Rindler causal horizons through each spacetime point, with $\\delta Q$ and $T$ interpreted as the energy flux and Unruh temperature seen by an accelerated observer just inside the horizon. This requires that gravitational lensing by matter energy distorts the causal structure of spacetime in just such a way that the Einstein equation holds. Viewed in this way, the Einstein equation is an equation of state. This perspective suggests that it may be no more appropriate to canonically quantize the Einstein equation than it would be to quantize the wave equation for sound in air.

Ted Jacobson

1995-06-06T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Gravitation and Thermodynamics: The Einstein Equation of State Revisited  

E-Print Network [OSTI]

We perform an analysis where Einstein's field equation is derived by means of very simple thermodynamical arguments. Our derivation is based on a consideration of the properties of a very small, spacelike two-plane in a uniformly accelerating motion.

Jarmo Makela; Ari Peltola

2008-08-19T23:59:59.000Z

182

Bose-Einstein condensation in the Rindler space-time  

E-Print Network [OSTI]

We analyze the critical acceleration of the Bose-Einstein condensation induced by the Unruh effect in a complex scalar field at the finite density in the Rindler space-time.

Takeuchi, Shingo

2015-01-01T23:59:59.000Z

183

Realization of Bose-Einstein condensation with Lithium-7 atoms  

E-Print Network [OSTI]

This thesis presents our work on developing and improving the techniques of trapping and cooling an ultra-cold cloud of Lithium-7 atoms and the realization of the Bose- Einstein condensate as a first step to study quantum ...

Yu, Yichao

2014-01-01T23:59:59.000Z

184

Effects of interaction in Bose-Einstein condensates  

E-Print Network [OSTI]

This thesis discusses a series of studies that investigate the effects of interaction - essentially the s-wave scattering - in the various properties of Bose-Einstein condensates (BEC). The phonon wavefunction in a BEC was ...

Xu, Kaiwen

2006-01-01T23:59:59.000Z

185

ccsd00000553 L'ARGUMENT EINSTEIN PODOLSKY ROSEN (EPR)  

E-Print Network [OSTI]

ccsd­00000553 (version 1) : 29 Aug 2003 L'ARGUMENT EINSTEIN PODOLSKY ROSEN (EPR) : PARADOXE'article EPR (A. Einstein, B. Podolsky, N. Rosen, #19;ecrit en 1935), qui est #18;a l'origine de l'aujourd'hui, est analys#19;e. Avec Schrodinger, Bohr, Wigner et jusqu'#18;a aujourd'hui, la r#19;eponse #18;a EPR

186

Bose-Einstein condensation of a quantum group gas  

E-Print Network [OSTI]

We study the Bose-Einstein condensation of a gas with $SU_q(2)$ symmetry. We show, in the thermodynamic limit, that the boson interactions introduced by the quantum group symmetries enhance Bose-Einstein condensation giving a discontinuity in the heat capacity $C_v$ at the critical temperature $T_c$. The critical temperature and the gap in $C_v$ increase with the value of the parameter $q$ and become approximately constant for $q>3$.

Marcelo R. Ubriaco

1997-10-10T23:59:59.000Z

187

Entanglement spectrum: Identification of the transition from vortex-liquid to vortex-lattice state in a weakly interacting rotating Bose-Einstein condensate  

SciTech Connect (OSTI)

We use entanglement to investigate the transition from vortex-liquid phase to vortex-lattice phase in a weakly interacting rotating Bose-Einstein condensate. For the torus geometry, the ground-state entanglement spectrum is analyzed to distinguish these two phases. The low-lying part of the ground-state entanglement spectrum, as well as the behavior of its lowest level, changes clearly when the transition occurs. For the sphere geometry, the entanglement gap in the conformal limit is also studied. We also show that the decrease in entanglement between particles can be regarded as a signal of the transition.

Liu Zhao; Guo Hongli; Fan Heng [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Vedral, Vlatko [Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU (United Kingdom); Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543 (Singapore); Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)

2011-01-15T23:59:59.000Z

188

Gravitational dynamics in Bose Einstein condensates  

E-Print Network [OSTI]

Analogue models for gravity intend to provide a framework where matter and gravity, as well as their intertwined dynamics, emerge from degrees of freedom that have a priori nothing to do with what we call gravity or matter. Bose Einstein condensates (BEC) are a natural example of analogue model since one can identify matter propagating on a (pseudo-Riemannian) metric with collective excitations above the condensate of atoms. However, until now, a description of the "analogue gravitational dynamics" for such model was missing. We show here that in a BEC system with massive quasi-particles, the gravitational dynamics can be encoded in a modified (semi-classical) Poisson equation. In particular, gravity is of extreme short range (characterized by the healing length) and the cosmological constant appears from the non-condensed fraction of atoms in the quasi-particle vacuum. While some of these features make the analogue gravitational dynamics of our BEC system quite different from standard Newtonian gravity, we nonetheless show that it can be used to draw some interesting lessons about "emergent gravity" scenarios.

Florian Girelli; Stefano Liberati; Lorenzo Sindoni

2008-12-03T23:59:59.000Z

189

Realization of Bose-Einstein condensates in lower dimensions Bose-Einstein condensates of sodium atoms have been prepared in optical and  

E-Print Network [OSTI]

Realization of Bose-Einstein condensates in lower dimensions Bose-Einstein condensates of sodium dimensions exceeds the interaction energy between atoms. This realized condensates of lower dimensionality [1]. In anisotropic traps, a primary indicator of crossing the transition temperature for Bose- Einstein condensation

190

Williams Companies Distinguished Chair in Energy Technology Raj Singh will lead  

E-Print Network [OSTI]

Williams Companies Distinguished Chair in Energy Technology Raj Singh will lead the new school Williams Companies Distinguished Chair in Energy Technology. "I'm quite excited by what we are doing at OSU Companies Distinguished Chair in Energy Technology. As the chair, Singh will research advanced materials

Piao, Daqing

191

Der Briefwechsel zwischen Sidonie Na?dherny? und Albert Bloch : September 1947-September 1950 : mit einer Einfu?hrung in die Widmungsgedichte von Karl Kraus an Sidonie Na?dherny?  

E-Print Network [OSTI]

Die Aufgabe dieser Arbeit besteht darin, Sidonie Na?dherny? Einfluß auf das Werk von Karl Kraus, vor allem auf seine Lyrik, an Hand der Albert Bloch/Sidonie Na?dherny?-Korrespondenz auszuwerten. Neben den eigentlichen ...

Champion, Elke Lorenz

1998-01-01T23:59:59.000Z

192

The Chancellor's Award for Distinguished Contribution to the University This award recognises distinguished service of a high degree. Staff, students and alumni of the  

E-Print Network [OSTI]

The Chancellor's Award for Distinguished Contribution to the University This award recognises distinguished service of a high degree. Staff, students and alumni of the University whose contribution to the economic, cultural, scientific or social development of Australia or the international community has

Botea, Adi

193

Distinguishing two kinds of scalar mesons from heavy meson decays  

SciTech Connect (OSTI)

In the SU(3) symmetry limit, semileptonic D{sup +}{yields}Sl{sup +}{nu} and B{sup -}{yields}Sl{sup -}{nu} decays, with S=a{sub 0}(980), f{sub 0}(980), and f{sub 0}(600), are found to obey different sum rules in the qq and the tetraquark descriptions for scalar mesons. Thus these sum rules can distinguish the two scenarios for light scalar mesons model independently. This method also applies to the B{sup 0}{yields}J/{psi}({eta}{sub c})S decays. Two kinds of SU(3) symmetry breaking effects are found to be under control, which will not spoil our method. The branching fractions of the D{sup +}{yields}Sl{sup +}{nu}, B{sup -}{yields}Sl{sup -}{nu}, and B{sup 0}{yields}J/{psi}({eta}{sub c})S decays roughly have the order 10{sup -4}, 10{sup -5}, and 10{sup -6}, respectively. The ongoing BEPC II and the forthcoming Super B experiments are able to measure these channels and, accordingly, to provide detailed information of the scalar meson inner structure.

Wang, Wei [Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China); Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Bari 70126 (Italy); Lue, Cai-Dian [Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)

2010-08-01T23:59:59.000Z

194

Propane tank explosion (2 deaths, 7 injuries) at Herrig Brothers Feather Creek Farm, Albert City, Iowa, April 9, 1998. Investigation report  

SciTech Connect (OSTI)

This report explains the explosion/BLEVE that took place on April 9, 1998, at the Herrig Brothers Feather Creek Farm, located in Albert City, Iowa. Two volunteer fire fighters were killed and seven other emergency response personnel were injured. Safety issues covered in the report include protection of propane storage tanks and piping, state regulatory oversight of such installations, and fire fighter response to propane storage tank fires.

NONE

1999-09-01T23:59:59.000Z

195

A Machian Version of Einstein's Variable Speed of Light Theory  

E-Print Network [OSTI]

It is little known that while developing general relativity, Einstein's very first idea was a variable speed of light theory. Indeed spacetime curvature can be mimicked by a speed of light $c(r)$ that depends on the distribution of masses. Einstein's 1911 theory was considerably improved by Robert Dicke in 1957, but only recently the equivalence of the variable speed of light approach to the conventional formalism has been demonstrated (Broekaert, 2008). Using Green's functions, we show that Einstein's 1911 idea can be expressed in an analytic form, similar to the Poisson equation. Using heuristic arguments, we derive then a simple formula that directly relates curvature $w$ to the local speed of light, $w= -c^2 \\Delta \\frac{1}{c^2}$. In contrast to the conventional formulation, this allows for a Machian interpretation of general relativity and the gravitational constant $G$. Gravity, though described by local equations, would have its origin in all other masses in the universe.

Unzicker, Alexander

2015-01-01T23:59:59.000Z

196

A Machian Version of Einstein's Variable Speed of Light Theory  

E-Print Network [OSTI]

It is little known that while developing general relativity, Einstein's very first idea was a variable speed of light theory. Indeed spacetime curvature can be mimicked by a speed of light $c(r)$ that depends on the distribution of masses. Einstein's 1911 theory was considerably improved by Robert Dicke in 1957, but only recently the equivalence of the variable speed of light approach to the conventional formalism has been demonstrated (Broekaert, 2008). Using Green's functions, we show that Einstein's 1911 idea can be expressed in an analytic form, similar to the Poisson equation. Using heuristic arguments, we derive then a simple formula that directly relates curvature $w$ to the local speed of light, $w= -c^2 \\Delta \\frac{1}{c^2}$. In contrast to the conventional formulation, this allows for a Machian interpretation of general relativity and the gravitational constant $G$. Gravity, though described by local equations, would have its origin in all other masses in the universe.

Alexander Unzicker; Jan Preuss

2015-03-13T23:59:59.000Z

197

Universit Joseph Fourier / Universit Pierre Mends France / Universit Stendhal / Universit de Savoie / Grenoble INP  

E-Print Network [OSTI]

forte del vapore, dell'elettricità e dell'energia solare: la volontà." Albert Einstein tel-00864002

Paris-Sud XI, Université de

198

DISSERTATION Electronic structure and transport  

E-Print Network [OSTI]

Unterschrift #12; ``Gott wË?urfelt nicht!'' ``God does not throw dice!'' Albert Einstein, Solvay conference

Florian, Libisch

199

??Rubidium Bose-Einstein condensates : machine construction and quantum Zeno experiments  

E-Print Network [OSTI]

This thesis details construction of a new apparatus for the production of 87Rb Bose-Einstein condensates and a subsequent quantum Zeno effect experiment. An experimental apparatus for producing large Bose-Einstein condensates ...

Streed, Erik William

2006-01-01T23:59:59.000Z

200

Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and Bela Szilagyi  

E-Print Network [OSTI]

Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and Be´la Szila´gyi

Lindblom, Lee

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Experiments with Bose-Einstein Condensates in a Double-Well Potential  

E-Print Network [OSTI]

Experiments with Bose-Einstein Condensates in a Double-Well Potential by Yong-Il Shin B.S., Physics-Einstein Condensates in a Double-Well Potential by Yong-Il Shin Submitted to the Department of Physics on November 17 Trapped atom interferometry was demonstrated with Bose-Einstein condensates in an opti- cal double

202

Dynamic Properties of Dilute Bose-Einstein Condensates Dallin S. Durfee  

E-Print Network [OSTI]

Dynamic Properties of Dilute Bose-Einstein Condensates by Dallin S. Durfee Submitted-Einstein Condensates by Dallin S. Durfee Submitted to the Department of Physics on August 30, 1999, in partial apparatus for the study of Bose-Einstein condensation is described, and the first two experiments performed

Hart, Gus

203

Progress in year 2002 1. Propagation of Bose-Einstein condensates in a magnetic waveguide  

E-Print Network [OSTI]

1 Progress in year 2002 1. Propagation of Bose-Einstein condensates in a magnetic waveguide-Einstein condensates offer prospects for finer control over the clouds. We have demonstrated that a gaseous Bose-Einstein condensate transported with optical tweezers [1] can be transferred into a magnetic trap microfabricated

204

Numerical analysis of BoseEinstein condensation in a three-dimensional harmonic oscillator potential  

E-Print Network [OSTI]

Numerical analysis of Bose­Einstein condensation in a three-dimensional harmonic oscillator in the undergraduate physics curriculum. Standard textbook treatments of Bose­Einstein condensation5 investigate a gas 24 March 1997; accepted 12 May 1997 Bose­Einstein condensation is the anomalous accumulation

Ligare, Martin

205

Can dark matter be a Bose-Einstein condensate?  

E-Print Network [OSTI]

We consider the possibility that the dark matter, which is required to explain the dynamics of the neutral hydrogen clouds at large distances from the galactic center, could be in the form of a Bose-Einstein condensate. To study the condensate we use the non-relativistic Gross-Pitaevskii equation. By introducing the Madelung representation of the wave function, we formulate the dynamics of the system in terms of the continuity equation and of the hydrodynamic Euler equations. Hence dark matter can be described as a non-relativistic, Newtonian Bose-Einstein gravitational condensate gas, whose density and pressure are related by a barotropic equation of state. In the case of a condensate with quartic non-linearity, the equation of state is polytropic with index $n=1$. To test the validity of the model we fit the Newtonian tangential velocity equation of the model with a sample of rotation curves of low surface brightness and dwarf galaxies, respectively. We find a very good agreement between the theoretical rotation curves and the observational data for the low surface brightness galaxies. The deflection of photons passing through the dark matter halos is also analyzed, and the bending angle of light is computed. The bending angle obtained for the Bose-Einstein condensate is larger than that predicted by standard general relativistic and dark matter models. Therefore the study of the light deflection by galaxies and the gravitational lensing could discriminate between the Bose-Einstein condensate dark matter model and other dark matter models.

C. G. Boehmer; T. Harko

2007-06-21T23:59:59.000Z

206

Kinematical Hilbert Space for Einstein-Cartan Theory  

E-Print Network [OSTI]

Kinematical Hilbert space for Einstein-Cartan theory is constructed via von Neumann ideas of infinity-dimensional tensor product of Hilbert spaces. Field of comframe is taken as basic variables what is in contrast with standard LQG where Wilson loops of Ashtekar-Barbero-Immirzi are taken.

Pilc, Marián

2013-01-01T23:59:59.000Z

207

Kinematical Hilbert Space for Einstein-Cartan Theory  

E-Print Network [OSTI]

Kinematical Hilbert space for Einstein-Cartan theory is constructed via von Neumann ideas of infinity-dimensional tensor product of Hilbert spaces. Field of comframe is considered as basic variable what is in contrast with standard euclidean LQG which is build by Wilson loops of Ashtekar-Barbero-Immirzi connection.

Marián Pilc

2013-12-07T23:59:59.000Z

208

On the Einstein-Cartan cosmology vs. Planck data  

E-Print Network [OSTI]

The first comprehensive analyses of Planck data reveal that the cosmological model with dark energy and cold dark matter can satisfactorily explain the essential physical features of the expanding Universe. However, the inability to simultaneously fit large and small scale TT power spectrum, scalar power index smaller than one and the observations of the violation of the isotropy found by few statistical indicators of the CMB, urge theorists to search for explanations. We show that the model of the Einstein-Cartan cosmology with clustered dark matter halos and their corresponding clustered angular momenta coupled to torsion, can account for small scale - large scale discrepancy and larger peculiar velocities (bulk flows) for galaxy clusters. The nonvanishing total angular momentum (torsion) of the Universe enters as a negative effective density term in the Einstein-Cartan equations causing partial cancellation of the mass density. The integrated Sachs-Wolfe contribution of the Einstein-Cartan model is negative, thus it can provide partial cancellation of the large scale power of the TT CMB spectrum. The observed violation of the isotropy appears as a natural ingredient of the Einstein-Cartan model caused by the spin densities of light Majorana neutrinos in the early stage of the evolution of the Universe and bound to the lepton CP violation and matter-antimatter asymmetry.

Davor Palle

2014-05-14T23:59:59.000Z

209

Generating conjecture and Einstein-Maxwell field of plane symmetry  

E-Print Network [OSTI]

For the plane symmetry we have found the electro-vacuum exact solutions of the Einstein-Maxwell equations and we have shown that one of them is equivalent to the McVittie solution of a charged infinite thin plane. The analytical extension has been accomplished and the Penrose conformal diagram has been obtained as well.

J. Fikar; J. Horsky

2000-04-10T23:59:59.000Z

210

2D dilaton-gravity from 5D Einstein equations  

E-Print Network [OSTI]

A semiclassical two-dimensional dilaton-gravity model is obtained by dimensional reduction of the spherically symmetric five-dimensional Einstein equations and used to investigate black hole evaporation. It is shown that this model prevents the formation of naked singularity and allows spacetime wormholes to contribute the process of formation and evaporation of black holes.

P. F. González-Díaz

1993-07-16T23:59:59.000Z

211

Hamilton-Jacobi Counterterms for Einstein-Gauss-Bonnet Gravity  

E-Print Network [OSTI]

The on-shell gravitational action and the boundary stress tensor are essential ingredients in the study of black hole thermodynamics. We employ the Hamilton-Jacobi method to calculate the boundary counterterms necessary to remove the divergences and allow the study of the thermodynamics of Einstein-Gauss-Bonnet black holes.

James T. Liu; Wafic A. Sabra

2008-07-08T23:59:59.000Z

212

No Open or Flat Bouncing Cosmologies in Einstein Gravity  

E-Print Network [OSTI]

We show that bouncing open or flat Friedmann-Robertson-Walker cosmologies are inconsistent with worldsheet string theory to first approximation. Specifically, the Virasoro constraint translates to the null energy condition in spacetime at leading order in the alpha-prime expansion. Thus one must go beyond minimally-coupled Einstein gravity in order to find bounce solutions.

Parikh, Maulik K

2015-01-01T23:59:59.000Z

213

Emergent gravitational dynamics in Bose-Einstein condensates  

E-Print Network [OSTI]

We discuss a toy model for an emergent non-relativistic gravitational theory. Within a certain class of Bose-Einstein condensates, it is possible to show that, in a suitable regime, a modified version of non-relativistic Newtonian gravity does effectively describes the low energy dynamics of the coupled system condensate/quasi-particles.

Lorenzo Sindoni; Florian Girelli; Stefano Liberati

2009-09-29T23:59:59.000Z

214

Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates  

E-Print Network [OSTI]

be homogeneous within the condensate we prove by means of an asymptotic analysis in the strongly interactingInhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates M. Correggia , N. Rougerieb, France. May 10, 2012 Abstract We consider a 2D rotating Bose gas described by the Gross-Pitaevskii (GP

Paris-Sud XI, Université de

215

Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates  

E-Print Network [OSTI]

should be homogeneous within the condensate we prove by means of an asymptotic analysis in the stronglyInhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates M. Correggia , N. Rougerieb, France. September 19, 2012 Abstract We consider a 2D rotating Bose gas described by the Gross

Paris-Sud XI, Université de

216

Einstein equations in the null quasi-spherical gauge  

E-Print Network [OSTI]

The structure of the full Einstein equations in a coordinate gauge based on expanding null hypersurfaces foliated by metric 2-spheres is explored. The simple form of the resulting equations has many applications -- in the present paper we describe the structure of timelike boundary conditions; the matching problem across null hypersurfaces; and the propagation of gravitational shocks.

Robert Bartnik

1997-05-29T23:59:59.000Z

217

EPR before EPR: a 1930 Einstein-Bohr thought experiment revisited  

E-Print Network [OSTI]

In 1930 Einstein argued against consistency of the time-energy uncertainty relation by discussing a thought experiment involving a measurement of mass of the box which emitted a photon. Bohr seemingly triumphed over Einstein by arguing that the Einstein's own general theory of relativity saves the consistency of quantum mechanics. We revisit this thought experiment from a modern point of view at a level suitable for undergraduate readership and find that neither Einstein nor Bohr was right. Instead, this thought experiment should be thought of as an early example of a system demonstrating nonlocal "EPR" quantum correlations, five years before the famous Einstein-Podolsky-Rosen paper.

H. Nikolic

2012-03-06T23:59:59.000Z

218

The train/embankment thought experiment, Einstein's second postulate of special relativity and relativity of simultaneity  

E-Print Network [OSTI]

The relativistic time dilatation effect and Einstein's second postulate of special relativity are used to analyse train/embankment thought expriments, both Einstein's original one, and an extension where observers on two trains moving at different speeds, as well as on the embankment, are considered. Whereas the relativistic analysis of Einstein's experiment shows, in contradiction to Einstein's interpretation, no `relativity of simultaneity' effect, the latter is apparent for certain events in the two-train experiment. The importance of relativistic kinematics --embodied for photons in Einstein's second postulate-- for the correct interpretation of the experiments is pointed out and demonstrated by detailed calculation of a related example.

J. H. Field

2009-01-09T23:59:59.000Z

219

Machines of life: catalogue, stochastic process modeling, probabilistic reverse engineering and the PIs- from Aristotle to Alberts  

E-Print Network [OSTI]

Molecular machines consist of either a single protein or a macromolecular complex composed of protein and RNA molecules. Just like their macroscopic counterparts, each of these nano-machines has an engine that "transduces" input energy into an output form which is then utilized by its coupling to a transmission system for appropriate operations. The theory of heat engines, pioneered by Carnot, rests on the second law of equilibrium thermodynamics. However, the engines of molecular machines, operate under isothermal conditions far from thermodynamic equilibrium. Moreover, one of the possible mechanisms of energy transduction, popularized by Feynman and called Brownian ratchet, does not even have any macroscopic counterpart. But, {\\it molecular machine is not synonymous with Brownian ratchet}; a large number of molecular machines actually execute a noisy power stroke, rather than operating as Brownian ratchet. The man-machine analogy, a topic of intense philosophical debate in which many leading philosophers like Aristotle and Descartes participated, was extended to similar analogies at the cellular and subcellular levels after the invention of optical microscope. The idea of molecular machine, pioneered by Marcelo Malpighi, has been pursued vigorously in the last fifty years. It has become a well established topic of current interdisciplinary research as evident from the publication of a very influential paper by Alberts towards the end of the twentieth century. Here we give a non-technical overview of the strategies for (a) stochastic modeling of mechano-chemical kinetic processes, and (b) model selection based on statistical inference drawn from analysis of experimental data. It is written for non-experts and from a broad perspective, showing overlapping concepts from several different branches of physics and from other areas of science and technology.

Debashish Chowdhury

2012-03-14T23:59:59.000Z

220

Improved gauge driver for the generalized harmonic Einstein system  

SciTech Connect (OSTI)

A new gauge driver is introduced for the generalized harmonic (GH) representation of Einstein's equation. This new driver allows a rather general class of gauge conditions to be implemented in a way that maintains the hyperbolicity of the combined evolution system. This driver is more stable and effective and, unlike previous drivers, allows stable evolutions using the dual-frame evolution technique. Appropriate boundary conditions for this new gauge driver are constructed, and a new boundary condition for the 'gauge' components of the spacetime metric in the GH Einstein system is introduced. The stability and effectiveness of this new gauge driver are demonstrated through numerical tests, which impose a new damped-wave gauge condition on the evolutions of single black-hole spacetimes.

Lindblom, Lee; Szilagyi, Bela [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

2009-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

An Improved Gauge Driver for the Generalized Harmonic Einstein System  

E-Print Network [OSTI]

A new gauge driver is introduced for the generalized harmonic (GH) representation of Einstein's equation. This new driver allows a rather general class of gauge conditions to be implemented in a way that maintains the hyperbolicity of the combined evolution system. This driver is more stable and effective, and unlike previous drivers, allows stable evolutions using the dual-frame evolution technique. Appropriate boundary conditions for this new gauge driver are constructed, and a new boundary condition for the ``gauge'' components of the spacetime metric in the GH Einstein system is introduced. The stability and effectiveness of this new gauge driver are demonstrated through numerical tests, which impose a new damped-wave gauge condition on the evolutions of single black-hole spacetimes.

Lee Lindblom; Bela Szilagyi

2009-10-01T23:59:59.000Z

222

An Electrical Spinning Particle In Einstein's Unified Field Theory  

E-Print Network [OSTI]

Previous work on exact solutions has been shown that sources need to be appended to the field equation of Einstein's unified field theory in order to achieve physically meaningful results,such sources can be included in a variational formulation by Borchsenius and moffat.The resulting field equations and conservation identities related to the theory that can be used to derive the equations of structure and motion of a pole-dipole particle according to an explicitly covariant approach by Dixon6.In this present paper it is shown that,under certain conditions for the energy tensor of the spinning particle,the equations of structure and motion in an electromagnetic field turn out to be formly identical to those occurring in Einstein-Maxwell theory.

S. N. Pandey; B. K. Sinha; Raj Kumar

2006-10-01T23:59:59.000Z

223

Back reaction of the neutrino field in an Einstein universe  

E-Print Network [OSTI]

The back reaction effect of the neutrino field at finite temperature in the background of the static Einstein universe is investigated. A relationship between the temperature of the universe and its radius is found. As in the previously studied cases of the massless scalar field and the photon field, this relation exhibit a minimum radius below which no self-consistent solution for the Einstein field equation can be found. A maximum temperature marks the transition from a vacuum dominated state to the radiation dominated state universe. In the light of the results obtained for the scalar, neutrino and photon fields the role of the back reaction of quantum fields in controling the value of the cosmological constant is briefly discussed.

M. B. Altaie

2002-12-31T23:59:59.000Z

224

Quantum-limited metrology and Bose-Einstein condensates  

E-Print Network [OSTI]

We discuss a quantum-metrology protocol designed to estimate a physical parameter in a Bose-Einstein condensate of N atoms, and we show that the measurement uncertainty can decrease faster than 1/N. The 1/N scaling is usually thought to be the best possible in any measurement scheme. From the perspective of quantum information theory, we outline the main idea that leads to a measurement uncertainty that scales better than 1/N. We examine in detail some potential problems and challenges that arise in implementing such a measurement protocol using a Bose-Einstein condensate. We discuss how some of these issues can be dealt with by using lower-dimensional condensates trapped in nonharmonic potentials.

Sergio Boixo; Animesh Datta; Matthew J. Davis; Anil Shaji; Alexandre B. Tacla; Carlton M. Caves

2009-08-18T23:59:59.000Z

225

Supermassive Black Holes as Giant Bose-Einstein Condensates  

E-Print Network [OSTI]

The Schwarzschild metric has a divergent energy density at the horizon, which motivates a new approach to black holes. If matter is spread uniformly throughout the interior of a supermassive black hole, with mass $M\\sim M_\\star= 2.34 10^8M_\\odot$, it may arise from a Bose-Einstein condensate of densely packed H-atoms. Within the Relativistic Theory of Gravitation with a positive cosmological constant, a bosonic quantum field is coupled to the curvature scalar. In the Bose-Einstein condensed groundstate an exact, selfconsistent solution for the metric is presented. It is regular with a specific shape at the origin. The redshift at the horizon is finite but large, $z\\sim 10^{14}$$M_\\star/M$. The binding energy remains as an additional parameter to characterize the BH; alternatively, the mass observed at infinity can be any fraction of the rest mass of its constituents.

Theo M. Nieuwenhuizen

2008-07-02T23:59:59.000Z

226

Distillation of Bose-Einstein condensates in a double-well potential The characteristic feature of Bose-Einstein condensation is the accumulation of a  

E-Print Network [OSTI]

Distillation of Bose-Einstein condensates in a double-well potential The characteristic feature of Bose-Einstein condensation is the accumulation of a macroscopic number of particles in the lowest quantum state. Condensate fragmentation, the macroscopic occupation of two or more quantum states

227

Numerical simulations of gravitational collapse in Einstein-aether theory  

E-Print Network [OSTI]

We study gravitational collapse of a spherically symmetric scalar field in Einstein-aether theory (general relativity coupled to a dynamical unit timelike vector field). The initial value formulation is developed, and numerical simulations are performed. The collapse produces regular, stationary black holes, as long as the aether coupling constants are not too large. For larger couplings a finite area singularity occurs. These results are shown to be consistent with the stationary solutions found previously.

David Garfinkle; Christopher Eling; Ted Jacobson

2007-07-01T23:59:59.000Z

228

On the Solutions of Einstein Equations with Massive Point Source  

E-Print Network [OSTI]

We show that Einstein equations are compatible with the presence of massive point particles and find corresponding two parameter family of their solutions which depends on the bare mechanical mass $M_0>0$ and the Keplerian mass $M

P. P. Fiziev

2004-12-30T23:59:59.000Z

229

Emergent quantum Euler equation and Bose-Einstein condensates  

E-Print Network [OSTI]

In this paper, proceeding from the recently developed way of deriving the quantum-mechanical equations from the classical ones, the complete system of hydrodynamical equations, including the quantum Euler equation, is derived for a perfect fluid and an imperfect fluid with pairwise interaction between the particles. For the Bose-Einstein condensate of the latter one the Bogolyubov spectrum of elementary excitations is easily reproduced in the acoustic approximation.

Maxim V. Eingorn; Vitaliy D. Rusov

2014-03-16T23:59:59.000Z

230

LIMITE DE CHAMP MOYEN ET CONDENSATION DE BOSE-EINSTEIN  

E-Print Network [OSTI]

-Einstein est obtenu lorsque certains gaz sont refroidis `a tr`es basse temp´erature et que les interactions laquelle on doit placer le syst`eme, et au fait qu'il doit ^etre assez dilu´e pour que les interactions micro-Kelvins, et celle de R. Hulet `a l'universit´e de Rice un autre compos´e d'atomes de lithium. En

231

Initial data for Einstein's equations with superposed gravitational waves  

E-Print Network [OSTI]

A method is presented to construct initial data for Einstein's equations as a superposition of a gravitational wave perturbation on an arbitrary stationary background spacetime. The method combines the conformal thin sandwich formalism with linear gravitational waves, and allows detailed control over characteristics of the superposed gravitational wave like shape, location and propagation direction. It is furthermore fully covariant with respect to spatial coordinate changes and allows for very large amplitude of the gravitational wave.

Harald P. Pfeiffer; Lawrence E. Kidder; Mark A. Scheel; Deirdre Shoemaker

2005-02-22T23:59:59.000Z

232

Creation of Dirac Monopoles in Spinor Bose-Einstein Condensates  

SciTech Connect (OSTI)

We demonstrate theoretically that, by using external magnetic fields, one can imprint pointlike topological defects on the spin texture of a dilute Bose-Einstein condensate. The symmetries of the condensate order parameter render this topological defect to be accompanied with a vortex filament corresponding to the Dirac string of a magnetic monopole. The vorticity in the condensate coincides with the magnetic field of a magnetic monopole, providing an ideal analogue to the monopole studied by Dirac.

Pietilae, Ville [Department of Applied Physics/COMP, Helsinki University of Technology, P.O. Box 5100, FI-02015 TKK (Finland); Australian Research Council, Centre of Excellence for Quantum Computer Technology, University of New South Wales, Sydney 2052 (Australia); Moettoenen, Mikko [Department of Applied Physics/COMP, Helsinki University of Technology, P.O. Box 5100, FI-02015 TKK (Finland); Australian Research Council, Centre of Excellence for Quantum Computer Technology, University of New South Wales, Sydney 2052 (Australia); Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, FI-02015 TKK (Finland)

2009-07-17T23:59:59.000Z

233

Photon-photon gates in Bose-Einstein condensates  

E-Print Network [OSTI]

It has recently been shown that light can be stored in Bose-Einstein condensates for over a second. Here we propose a method for realizing a controlled phase gate between two stored photons. The photons are both stored in the ground state of the effective trapping potential inside the condensate. The collision-induced interaction is enhanced by adiabatically increasing the trapping frequency and by using a Feshbach resonance. A controlled phase shift of $\\pi$ can be achieved in one second.

Arnaud Rispe; Bing He; Christoph Simon

2010-09-30T23:59:59.000Z

234

Beyond spontaneously broken symmetry in Bose-Einstein condensates  

E-Print Network [OSTI]

Spontaneous symmetry breaking (SSB) for Bose-Einstein condensates cannot treat phase off-diagonal effects, and thus not explain Bell inequality violations. We describe another situation that is beyond a SSB treatment: an experiment where particles from two (possibly macroscopic) condensate sources are used for conjugate measurements of the relative phase and populations. Off-diagonal phase effects are characterized by a "quantum angle" and observed via "population oscillations", signaling quantum interference of macroscopically distinct states (QIMDS).

W. J. Mullin; F. Laloë

2009-12-31T23:59:59.000Z

235

Bose-Einstein Condensates as a Probe for Lorentz Violation  

E-Print Network [OSTI]

The effects of small Lorentz-violating terms on Bose-Einstein condensates are analyzed. We find that there are changes to the phase and shape of the ground-state wave function that vary with the orientation of the trap. In addition, spin-couplings can act as a source for spontaneous symmetry breaking in ferromagnetic condensates making them sensitive probes for fundamental symmetry violation.

Don Colladay; Patrick McDonald

2006-02-08T23:59:59.000Z

236

Liquid-Gas phase transition in Bose-Einstein Condensates  

E-Print Network [OSTI]

We study the effects of a repulsive three-body interaction on a system of trapped ultra-cold atoms in a Bose-Einstein condensed state. The corresponding $s-$wave non-linear Schr\\"{o}dinger equation is solved numerically and also by a variational approach. A first-order liquid-gas phase transition is observed for the condensed state up to a critical strength of the effective three-body force.

A. Gammal; T. Frederico; L. Tomio; Ph. Chomaz

1999-04-13T23:59:59.000Z

237

Analogue spacetime based on 2-component Bose-Einstein condensates  

E-Print Network [OSTI]

Analogue spacetimes are powerful models for probing the fundamental physical aspects of geometry - while one is most typically interested in ultimately reproducing the pseudo-Riemannian geometries of interest in general relativity and cosmology, analogue models can also provide useful physical probes of more general geometries such as pseudo-Finsler spacetimes. In this chapter we shall see how a 2-component Bose-Einstein condensate can be used to model a specific class of pseudo-Finsler geometries, and after suitable tuning of parameters, both bi-metric pseudo-Riemannian geometries and standard single metric pseudo-Riemannian geometries, while independently allowing the quasi-particle excitations to exhibit a "mass". Furthermore, when extrapolated to extremely high energy the quasi-particles eventually leave the phononic regime and begin to act like free bosons. Thus this analogue spacetime exhibits an analogue of the "Lorentz violation" that is now commonly believed to occur at or near the Planck scale defined by the interplay between quantum physics and gravitational physics. In the 2-component Bose-Einstein analogue spacetime we will show that the mass generating mechanism for the quasi-particles is related to the size of the Lorentz violations. This relates the "mass hierarchy" to the so-called "naturalness problem". In short the analogue spacetime based on 2-component Bose-Einstein condensates exhibits a very rich mathematical and physical structure that can be used to investigate many issues of interest to the high-energy physics, cosmology, and general relativity communities.

Silke Weinfurtner; Stefano Liberati; Matt Visser

2006-05-22T23:59:59.000Z

238

Frontal brain electrical activity (EEG) distinguishes valence and intensity of musical emotions  

E-Print Network [OSTI]

Frontal brain electrical activity (EEG) distinguishes valence and intensity of musical emotions (i.e., positive vs. negative) and intensity (i.e., intense vs. calm) in a group of under- graduates

Trainor, Laurel J.

239

Lauds & Laurels Past Recipients Acosta-Tello, Enid -Distinguished Alumna, 2001  

E-Print Network [OSTI]

Aldrich, Jr., Daniel G. - Extraordinarius, 1980 Aldrich III, Daniel G. ­ Outstanding University Service, Allah-mi - Outstanding Athlete, 1996 Batchelder, William - Distinguished Research, 1994 Bauer, Linda Community Service, 2005 Bell, Grace B. - Professional Achievement (A), 1977 Benbasset, William A

Rose, Michael R.

240

E-Print Network 3.0 - allozyme markers distinguishing Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

results for: allozyme markers distinguishing Page: << < 1 2 3 4 5 > >> 1 Molecular Ecology (2003) 12, 25052510 doi: 10.1046j.1365-294X.2003.01936.x 2003 Blackwell Publishing...

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

University of Kentucky 2009-2010 Undergraduate Bulletin 12 UK's DistinguishedAlumni  

E-Print Network [OSTI]

University of Kentucky 2009-2010 Undergraduate Bulletin 12 UK's DistinguishedAlumni University of Kentucky Alumni Association The University of Kentucky Alumni Association is the official record keeper

MacAdam, Keith

242

MICHAEL L. CORRADINI Wisconsin Distinguished Professor Nuclear Engineering and Engineering Physics, Chair, Engineering Physics Department  

E-Print Network [OSTI]

MICHAEL L. CORRADINI Wisconsin Distinguished Professor Nuclear Engineering and Engineering Physics.S. Mechanical Engineering - 1975 Marquette University, Milwaukee WI M.S. Nuclear Engineering - 1976 Massachusetts Institute of Technology PhD Nuclear Engineering - 1978 Massachusetts Institute of Technology

Volpe, Francesco

243

Arden L. Bement Jr. David A. Ross Distinguished Professor Emeritus of Nuclear Engineering,  

E-Print Network [OSTI]

of Nuclear Engineering, Chief Global Affairs Officer Emeritus and Inaugural Director Emeritus, Global Policy Research Institute Department: Nuclear Engineering Office was the David A. Ross Distinguished Professor of Nuclear Engineering and head

Pittendrigh, Barry

244

Controlling phase separation of a two-component Bose-Einstein ...  

E-Print Network [OSTI]

Apr 5, 2012 ... Bose-Einstein condensate is insufficient if kinetic energy is taken into account, which competes against the intercomponent interaction and ...

2012-04-05T23:59:59.000Z

245

attractively interacting bose-einstein: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Attractive Interactions Our current understanding of the collapse of Bose-Einstein condensates (BECs) with attractive interactions is incomplete. Previous experiment studied very...

246

Application of Monodromy Transform Method to Solution of Einstein - Maxwell Equations with Isometries  

E-Print Network [OSTI]

Applications of the monodromy transform approach to construction of exact solutions of electrovacuum Einstein - Maxwell field equations are considered. Examples of new solutions are given.

G. A. Alekseev

2014-11-13T23:59:59.000Z

247

Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport  

E-Print Network [OSTI]

In this thesis, two different sets of experiments are described. The first is an exploration of the microscopic superfluidity of dilute gaseous Bose- Einstein condensates. The second set

Chikkatur, Ananth P.

2006-02-22T23:59:59.000Z

248

Quantum-information approach to rotating Bose-Einstein condensates  

SciTech Connect (OSTI)

We investigate the two-dimensional weakly interacting rotating Bose-Einstein condensate by the tools of quantum information theory. The critical exponents of the ground-state fidelity susceptibility and the correlation length of the system are obtained for the sudden change of the ground state when the first vortex is formed. This sudden change can also be indicated by the ground state entanglement. We also find the single-particle entanglement can be an indicator of the angular momentums for some real ground states. The single-particle entanglement of fractional quantum Hall states such as Laughlin state and Pfaffian state is also studied.

Liu Zhao; Guo Hongli; Chen Shu; Fan Heng [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2009-12-15T23:59:59.000Z

249

On Einstein-Cartan Theory: I. Kinematical description  

E-Print Network [OSTI]

Equations of motion for general gravitational connection and orthonormal coframe from the Einstein-Hilbert type action are derived. Our formulation does not fix coframe to be tangential to spatial section hence Lorentz group is still present as a part of gauge freedom. 3+1 decomposition introduces tangent Minkowski structures hence Hamilton-Dirac approach to dynamics works with Lorentz connection over the spatial section. The second class constraints are analyzed and Dirac bracket is defined. Reduction of the phase space is performed and canonical coordinates are introduced.

Marián Pilc

2013-12-07T23:59:59.000Z

250

On Einstein-Cartan Theory: I. Kinematical description  

E-Print Network [OSTI]

Equations of motion for general gravitational connection and orthonormal coframe from the Einstein-Hilbert type action are derived. Additional gauge freedom is geometrically interpreted. Our formulation does not fix coframe to be tangential to spatial section hence Lorentz group is still present as a part of gauge freedom. 3+1 decomposition introduces tangent Minkowski structures hence Hamilton-Dirac approach to dynamics works with Lorentz connection over the spatial section. The second class constraints are analyzed and Dirac bracket is defined. Reduction of the phase space is performed and canonical coordinates are introduced.

Pilc, Marián

2013-01-01T23:59:59.000Z

251

228 OPTRONICS 2008 No.1 Bose-Einstein condensation  

E-Print Network [OSTI]

228 OPTRONICS 2008 No.1 1980 1 1995 Bose-Einstein condensation BEC 1 BEC 10 6 2 BEC light. Wieman W. Ketterle 3 #12;OPTRONICS 2008 No.1 229 1W 1/ h (1/h) hk =1/c3.3 10 -9 N 2 2 +q(q>0) -q p E B (1 (a b)=(a )b+(b )a+a ( b)+b( a) 4 #12;230 OPTRONICS 2008 No.1 (4) 3 1 1 2 E p U=-p E/2 5 5 (6) 4 1

Torii, Yoshio

252

Space-Time Curvature Signatures in Bose-Einstein Condensates  

E-Print Network [OSTI]

We derive a generalized Gross-Pitaevski (GP) equation immersed on a electromagnetic and a weak gravitational field starting from the covariant Complex Klein-Gordon field in a curved space-time. We compare it with the GP equation where the gravitational field is added by hand as an external potential. We show that there is a small difference of order $g z/c^2$ between them that could be measured in the future using Bose-Einstein Condensates (BEC). This represents the next order correction to the Newtonian gravity in a curved space-time.

Matos, Tonatiuh

2015-01-01T23:59:59.000Z

253

Dark Matter Halos as Bose-Einstein Condensates  

E-Print Network [OSTI]

Galactic dark matter is modelled by a scalar field in order to effectively modify Kepler's law without changing standard Newtonian gravity. In particular, a solvable toy model with a self-interaction U(Phi) borrowed from non-topological solitons produces already qualitatively correct rotation curves and scaling relations. Although relativistic effects in the halo are very small, we indicate corrections arising from the general relativistic formulation. Thereby, we can also probe the weak gravitational lensing of our soliton type halo. For cold scalar fields, it corresponds to a gravitationally confined Boson-Einstein condensate, but of galactic dimensions.

Eckehard W. Mielke; Burkhard Fuchs; Franz E. Schunck

2006-08-24T23:59:59.000Z

254

Optimal quantum control of Bose Einstein condensates in magnetic microtraps  

E-Print Network [OSTI]

Transport of Bose-Einstein condensates in magnetic microtraps, controllable by external parameters such as wire currents or radio-frequency fields, is studied within the framework of optimal control theory (OCT). We derive from the Gross-Pitaevskii equation the optimality system for the OCT fields that allow to efficiently channel the condensate between given initial and desired states. For a variety of magnetic confinement potentials we study transport and wavefunction splitting of the condensate, and demonstrate that OCT allows to drastically outperfrom more simple schemes for the time variation of the microtrap control parameters.

Ulrich Hohenester; Per Kristian Rekdal; Alfio Borzi; Joerg Schmiedmayer

2007-01-15T23:59:59.000Z

255

Fidelity decay in trapped Bose-Einstein condensates  

E-Print Network [OSTI]

The quantum coherence of a Bose-Einstein condensate is studied using the concept of quantum fidelity (Loschmidt echo). The condensate is confined in an elongated anharmonic trap and subjected to a small random potential such as that created by a laser speckle. Numerical experiments show that the quantum fidelity stays constant until a critical time, after which it drops abruptly over a single trap oscillation period. The critical time depends logarithmically on the number of condensed atoms and on the perturbation amplitude. This behavior may be observable by measuring the interference fringes of two condensates evolving in slightly different potentials.

G. Manfredi; P. -A. Hervieux

2008-01-29T23:59:59.000Z

256

Subcritical temperature in Bose-Einstein condensates of chiral molecules  

E-Print Network [OSTI]

Bose-Einstein condensation of a sample of non-interacting chiral molecules leads to a non zero optical activity of the condensate and also to a subcritical temperature in the heat capacity. This is due to the internal structure of the molecule which, in our model, is considered as a simple two-state system, characterized by tunneling and parity violation. The predicted singular behavior found for the specific heat, below the condensation temperature, sheds some light on the existence of the so far elusive parity violation energy difference between enantiomers.

Pedro Bargueno; Ricardo Perez de Tudela; Salvador Miret-Artes; Isabel Gonzalo

2010-04-21T23:59:59.000Z

257

Quantum top inside a Bose-Einstein-condensate Josephson junction  

SciTech Connect (OSTI)

We consider an atomic quantum dot confined between two weakly coupled Bose-Einstein condensates, where the dot serves as an additional tunneling channel. It is shown that the thus-embedded atomic quantum dot is a pseudospin subject to an external torque, and therefore equivalent to a quantum top. We demonstrate by numerical analysis of the time-dependent coupled evolution equations that this microscopic quantum top is very sensitive to any deviation from linear oscillatory behavior of the condensates. For sufficiently strong dot-condensate coupling, the atomic quantum dot can induce or modify the tunneling between the macroscopic condensates in the two wells.

Bausmerth, Ingrid; Posazhennikova, Anna [Institut fuer Theoretische Festkoerperphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany); Fischer, Uwe R. [Institut fuer Theoretische Physik, Eberhard-Karls-Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

2007-05-15T23:59:59.000Z

258

On isotropic metric of Schwarzschild solution of Einstein equation  

E-Print Network [OSTI]

The known static isotropic metric of Schwarzschild solution of Einstein equation cannot cover with the range of r<2MG, a new isotropic metric of Schwarzschild solution is obtained. The new isotropic metric has the characters: (1) It is dynamic and periodic. (2) It has infinite singularities of the spacetime. (3) It cannot cover with the range of 0

T. Mei

2006-10-24T23:59:59.000Z

259

Can dark matter be a Bose-Einstein condensate?  

E-Print Network [OSTI]

We consider the possibility that the dark matter, which is required to explain the dynamics of the neutral hydrogen clouds at large distances from the galactic center, could be in the form of a Bose-Einstein condensate. To study the condensate we use the non-relativistic Gross-Pitaevskii equation. By introducing the Madelung representation of the wave function, we formulate the dynamics of the system in terms of the continuity equation and of the hydrodynamic Euler equations. Hence dark matter can be described as a non-relativistic, Newtonian Bose-Einstein gravitational condensate gas, whose density and pressure are related by a barotropic equation of state. In the case of a condensate with quartic non-linearity, the equation of state is polytropic with index $n=1$. To test the validity of the model we fit the Newtonian tangential velocity equation of the model with a sample of rotation curves of low surface brightness and dwarf galaxies, respectively. We find a very good agreement between the theoretical rot...

Boehmer, C G

2007-01-01T23:59:59.000Z

260

Wave turbulence and vortices in Bose-Einstein condensation  

E-Print Network [OSTI]

We report a numerical study of turbulence and Bose-Einstein condensation within the two-dimmensional Gross-Pitaevski model with repulsive interaction. In presence of weak forcing localized around some wave number in the Fourier space, we observe three qualitatively different evolution stages. At the initial stage a thermodynamic energy equipartition spectrum forms at both smaller and larger scales with respect to the forcing scale. This agrees with predictions of the the four-wave kinetic equation of the Wave Turbulence (WT) theory. At the second stage, WT breaks down at large scales and the interactions become strongly nonlinear. Here, we observe formation of a gas of quantum vortices whose number decreases due to an annihilation process helped by the acoustic component. This process leads to formation of a coherent-phase Bose-Einstein condensate. After such a coherent-phase condensate forms, evolution enters a third stage characterised by three-wave interactions of acoustic waves that can be described again using the WT theory.

Sergey Nazarenko; Miguel Onorato

2005-07-25T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


261

Strong gravitational lensing of gravitational waves in Einstein Telescope  

SciTech Connect (OSTI)

Gravitational wave experiments have entered a new stage which gets us closer to the opening a new observational window on the Universe. In particular, the Einstein Telescope (ET) is designed to have a fantastic sensitivity that will provide with tens or hundreds of thousand NS-NS inspiral events per year up to the redshift z = 2. Some of such events should be gravitationally lensed by intervening galaxies. We explore the prospects of observing gravitationally lensed inspiral NS-NS events in the Einstein telescope. Being conservative we consider the lens population of elliptical galaxies. It turns out that depending on the local insipral rate ET should detect from one per decade detection in the pessimistic case to a tens of detections per year for the most optimistic case. The detection of gravitationally lensed source in gravitational wave detectors would be an invaluable source of information concerning cosmography, complementary to standard ones (like supernovae or BAO) independent of the local cosmic distance ladder calibrations.

Piórkowska, Aleksandra; Biesiada, Marek [Department of Astrophysics and Cosmology, Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice (Poland); Zhu, Zong-Hong, E-mail: aleksandra.piorkowska@us.edu.pl, E-mail: marek.biesiada@us.edu.pl, E-mail: zhuzh@bnu.edu.cn [Department of Astronomy, Beijing Normal University, Beijing 100875 (China)

2013-10-01T23:59:59.000Z

262

Bose-Einstein Condensation in Atomic Gases Jerzy Zachorowski and Wojciech Gawlik  

E-Print Network [OSTI]

. It is instructive to compare orders of magnitude typical for the thermal and condensed gas samples. For atom gasBose-Einstein Condensation in Atomic Gases Jerzy Zachorowski and Wojciech Gawlik M. Smoluchowski on the Bose-Einstein condensate. We also present main parameters and expected characteristics of the first Pol

263

Einstein's View of God Nancy Ellen Abrams and Joel R. Primack  

E-Print Network [OSTI]

source of conflict between science and religion. God was not a father, king, or confidant. Nor was God the source of morality to Einstein. "The foundation of morality should not be made dependent on myth nor tied who concerns himself with the fate and actions of human beings." The rock of Einstein's faith

California at Santa Cruz, University of

264

Diffractive Nonlinear Geometrical Optics for Variational Wave Equations and the Einstein Equations  

E-Print Network [OSTI]

We derive an asymptotic solution of the vacuum Einstein equations that describes the propagation and diffraction of a localized, large-amplitude, rapidly-varying gravitational wave. We compare and contrast the resulting theory of strongly nonlinear geometrical optics for the Einstein equations with nonlinear geometrical optics theories for variational wave equations.

Giuseppe Ali; John K. Hunter

2005-11-02T23:59:59.000Z

265

Interferometry with independent Bose-Einstein condensates: parity as an EPR/Bell quantum variable  

E-Print Network [OSTI]

Interferometry with independent Bose-Einstein condensates: parity as an EPR/Bell quantum variable F arrangements. PACS numbers: 03.65.Ud, 03.75.Gg, 42.50.Xa The original Einstein-Podolsky-Rosen (EPR) argument [1 called "orthodox"), the notion of reality introduced by EPR is inappropriate. Later, Bell extended

Paris-Sud XI, Université de

266

Generalized coherent state representation of Bose-Einstein condensates V. Chernyak,1  

E-Print Network [OSTI]

Generalized coherent state representation of Bose-Einstein condensates V. Chernyak,1 S. Choi,2 2003 We show that the quantum many-body state of Bose-Einstein condensates consistent with the time of the condensate and noncondensate atoms required for the description of finite-temperature BEC

Mukamel, Shaul

267

ccsd-00021948,version1-29Mar2006 Bose-Einstein condensates in fast rotation  

E-Print Network [OSTI]

ccsd-00021948,version1-29Mar2006 Bose-Einstein condensates in fast rotation S. Stock, B. Battelier of atomic Bose-Einstein condensates confined in quadratic or quartic potentials, and give an overview the physics of condensates containing a single vortex line. We then address the regime of fast rotation

Boyer, Edmond

268

Vortices in Bose-Einstein condensates confined in a multiply connected Laguerre-Gaussian optical trap  

E-Print Network [OSTI]

Vortices in Bose-Einstein condensates confined in a multiply connected Laguerre-Gaussian optical-Einstein condensate, confined in a multiply connected geometry formed by a Laguerre-Gaussian optical trap. Solving expanding Laguerre-Gaussian condensate with a vortex is calculated and used to derive the interference

Abraham, Eric

269

PreprintKULTF2000/12 Interferencing in coupled BoseEinstein condensates  

E-Print Network [OSTI]

Preprint­KUL­TF­2000/12 Interferencing in coupled Bose­Einstein condensates T. Michoel 1 , A­Einstein condensates with a Joseph­ son­type of coupling. Its equilibrium states are explicitly found showing condensation and spontaneously broken gauge symmetry. It is proved that the total number and total phase

270

Vortex-peak interaction and lattice shape in rotating two-component Bose-Einstein condensates  

E-Print Network [OSTI]

Vortex-peak interaction and lattice shape in rotating two-component Bose-Einstein condensates: November 28, 2011) When a two component Bose-Einstein condensate is placed into rotation, a lattice component condensate is set into rotation, topological defects of both order parameters are created, which

Wei, Jun-cheng

271

Efficiently computing vortex lattices in fast rotating Bose-Einstein condensates Yanzhi Zhang1,2  

E-Print Network [OSTI]

Efficiently computing vortex lattices in fast rotating Bose-Einstein condensates Yanzhi Zhang1-Einstein condensates (BECs) with strongly repulsive interactions. The key ingredients of the method is to discretize method in time. Different vortex lattice structures of condensate ground state in two-dimensional (2D

Bao, Weizhu

272

Dynamical quantum noise in trapped Bose-Einstein condensates M. J. Steel,1,2  

E-Print Network [OSTI]

Dynamical quantum noise in trapped Bose-Einstein condensates M. J. Steel,1,2 M. K. Olsen,1, * L. I introduce the study of dynamical quantum noise in Bose-Einstein condensates through numerical simu- lation equations for a single trapped condensate in both the positive-P and Wigner representations and perform

Queensland, University of

273

ccsd00001592, Interference of an array of independent Bose-Einstein condensates  

E-Print Network [OSTI]

-Einstein condensates Zoran Hadzibabic, Sabine Stock, Baptiste Battelier, Vincent Bretin, and Jean Dalibard Laboratoire-contrast matter wave interference between 30 Bose-Einstein condensates with uncorrelated phases. Interference patterns were observed after independent condensates were released from a one-dimensional optical lattice

274

Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport  

E-Print Network [OSTI]

Colliding and Moving Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport by Ananth P. Chikkatur Submitted to the Department of Physics in partial fulfillment Bose-Einstein Condensates: Studies of superfluidity and optical tweezers for condensate transport

275

Symmetry-breaking thermally induced collapse of dipolar Bose-Einstein condensates Andrej Junginger,  

E-Print Network [OSTI]

Symmetry-breaking thermally induced collapse of dipolar Bose-Einstein condensates Andrej Junginger LE11 3TU, UK (Dated: August 13, 2012) We investigate a Bose-Einstein condensate with additional long" that mediates the collapse of the condensate. For a certain value of the s-wave scatting length our

276

Formation and Decay of Vortex Lattices in Bose-Einstein Condensates at Finite Temperatures  

E-Print Network [OSTI]

Formation and Decay of Vortex Lattices in Bose-Einstein Condensates at Finite Temperatures Gaseous Bose-Einstein condensates (BEC) are a testbed for many-body theory. Recently, rotating condensates was observed non-destructively by monitoring the centrifugal distortions of the rotating condensate

277

Progress in year 2001 1. Observation of Vortex Lattices in Bose-Einstein Condensates  

E-Print Network [OSTI]

1 Progress in year 2001 1. Observation of Vortex Lattices in Bose-Einstein Condensates Quantized in rotating gaseous Bose-Einstein condensates (BEC) [2, 3]. We have observed the formation of highly-ordered vortex lattices in a rotating Bose- condensed gas [4]. They were produced by rotating the condensate

278

Bose-Einstein condensates in 85 Rb gases at higher densities  

E-Print Network [OSTI]

Bose-Einstein condensates in 85 Rb gases at higher densities A. R. Sakhel, J. L. DuBois, and H. R August 2002; published 31 December 2002 The Bose-Einstein condensation in trapped gases of 85 Rb find that there is a significant depletion of the condensate at T 0 K, for example, 25% at na3 10 2

Glyde, Henry R.

279

Collapse of Bose-Einstein condensates with dipole-dipole interactions Pavel M. Lushnikov*  

E-Print Network [OSTI]

12 November 2002 The dynamics of Bose-Einstein condensates of a gas of bosonic particles with long of a trapped gas of dipolar particles and for long-time condensate existence. Sufficient criteria allow oneCollapse of Bose-Einstein condensates with dipole-dipole interactions Pavel M. Lushnikov

Lushnikov, Pavel

280

Feshbach resonance management of Bose-Einstein condensates in optical lattices Mason A. Porter  

E-Print Network [OSTI]

Feshbach resonance management of Bose-Einstein condensates in optical lattices Mason A. Porter; published 15 September 2006 We analyze gap solitons in trapped Bose-Einstein condensates BECs in optical.75.Lm, 03.75.Nt I. INTRODUCTION At sufficiently low temperatures, particles in a dilute bo- son gas can

Porter, Mason A.

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Experimental observation of the Bogoliubov transformation for a Bose-Einstein condensed gas  

E-Print Network [OSTI]

Experimental observation of the Bogoliubov transformation for a Bose- Einstein condensed gas phonons into the condensate, momentum analysis via Bragg spectroscopy transfers a momentum ±Q (two photon of the Bogoliubov transformation for a Bose-Einstein condensed gas, Phys. Rev. Lett. 88, 060402 (2002). #12;

282

0.5setgray00.5setgray1 Bose-Einstein condensates in optical lattices  

E-Print Network [OSTI]

0.5setgray00.5setgray1 Bose-Einstein condensates in optical lattices: mathematical analysis ­ p. 1/3 #12;What is a "Bose-Einstein condensate"? http : //www.colorado.edu/physics/2000/bec/ "It is the physical state of a dilute gas of weakly interacting bosons confined in an external potential and cooled

Cipolatti, Rolci

283

NUMERICAL COMPUTATION OF QUANTIZED VORTICES IN THE BOSE-EINSTEIN CONDENSATE  

E-Print Network [OSTI]

. The theoretical analysis of many recent experimental work on a single component Bose-Einstein condensate has been of the gas are condensed in the same state for which the wave function minimizes the Gross-Pitaevskii energyNUMERICAL COMPUTATION OF QUANTIZED VORTICES IN THE BOSE-EINSTEIN CONDENSATE QIANG DU Abstract

Du, Qiang

284

Third Announcement Relativity and Gravitation 100 Years after Einstein in Prague  

E-Print Network [OSTI]

of Physics, University of Utah, Salt Lake City ) Canonical quantum gravity: Einstein's posthumous anathema and historical issues The meeting is organized under the auspices of the Rector of Charles University relativity: Kepler, Mach and Einstein · Jií Bicák (Institute of Theoretical Physics, Charles University

Cerveny, Vlastislav

285

Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology  

E-Print Network [OSTI]

We investigate the background dynamics when dark energy is coupled to dark matter in the universe described by Einstein cosmology and Loop Quantum Cosmology. We introduce a new general form of dark sector coupling, which presents us a more complicated dynamical phase space. Differences in the phase space in obtaining the accelerated scaling attractor in Einstein cosmology and Loop Quantum Cosmology are disclosed.

Songbai Chen; Bin Wang; Jiliang Jing

2008-11-10T23:59:59.000Z

286

Portable radiation-detection instruments for distinguishing nuclear from non-nuclear munitions  

SciTech Connect (OSTI)

The emission of gamma rays and fast neutrons by nuclear materials provides a simple means for distinguishing between real nuclear munitions and other assemblies that are non-nuclear, such as nuclear-explosive-like test assemblies (NELAs) and conventional munitions. The presence or absence of significant numbers of neutrons and characteristic plutonium gamma rays are distinguishing attributes for plutonium munitions. The presence of energetic gamma rays from {sup 232}U daughters, if present in sufficient number, is a distinguishing attribute for highly enriched uranium munitions. Some portable instruments are being developed for verifying that munitions are or are not nuclear, and others are already commercially available. The commercial ones have been evaluated for pre-flight non-nuclear verification of NELAs in Air Force flight tests. 7 refs., 5 figs.

Fehlau, P.E.

1991-01-01T23:59:59.000Z

287

Reconstruction of Einstein-Aether Gravity from other Modified Gravity Models  

E-Print Network [OSTI]

We briefly describe the modified Friedmann equations for Einstein-Aether gravity theory and we find the effective density and pressure. The purpose of our present work is to reconstruction of Einstein-Aether Gravity from other modified gravities like $f(T)$, $f(R)$, $f(G)$, $f(R,T)$ and $f(R,G)$ and check its viability. The scale factor is chosen in power law form. The free function $F(K)$ for Einstein-Aether gravity (where $K$ is proportional to $H^{2}$) have been found in terms for $K$ by the correspondence between Einstein-Aether gravity and other modified gravities and the nature of $F(K)$ vs $K$ have been shown graphically for every cases. Finally, we analyzed the stability of each reconstructed Einstein-Aether gravity model.

Chayan Ranjit; Ujjal Debnath

2014-09-08T23:59:59.000Z

288

Method and apparatus for distinguishing actual sparse events from sparse event false alarms  

DOE Patents [OSTI]

Remote sensing method and apparatus wherein sparse optical events are distinguished from false events. "Ghost" images of actual optical phenomena are generated using an optical beam splitter and optics configured to direct split beams to a single sensor or segmented sensor. True optical signals are distinguished from false signals or noise based on whether the ghost image is presence or absent. The invention obviates the need for dual sensor systems to effect a false target detection capability, thus significantly reducing system complexity and cost.

Spalding, Richard E. (Albuquerque, NM); Grotbeck, Carter L. (Albuquerque, NM)

2000-01-01T23:59:59.000Z

289

Exact solutions with AdS asymptotics of Einstein and Einstein-Maxwell gravity minimally coupled to a scalar field  

SciTech Connect (OSTI)

We propose a general method for solving exactly the static field equations of Einstein and Einstein-Maxwell gravity minimally coupled to a scalar field. Our method starts from an ansatz for the scalar field profile, and determines, together with the metric functions, the corresponding form of the scalar self-interaction potential. Using this method we prove a new no-hair theorem about the existence of hairy black-hole and black-brane solutions and derive broad classes of static solutions with radial symmetry of the theory, which may play an important role in applications of the AdS/CFT correspondence to condensed matter and strongly coupled QFTs. These solutions include: (1) four- or generic (d+2)-dimensional solutions with planar, spherical or hyperbolic horizon topology; (2) solutions with anti-de Sitter, domain wall and Lifshitz asymptotics; (3) solutions interpolating between an anti-de Sitter spacetime in the asymptotic region and a domain wall or conformal Lifshitz spacetime in the near-horizon region.

Cadoni, Mariano; Serra, Matteo; Mignemi, Salvatore [Dipartimento di Fisica, Universita di Cagliari and INFN, Sezione di Cagliari - Cittadella Universitaria, 09042 Monserrato (Italy); Dipartimento di Matematica, Universita di Cagliari and INFN, Sezione di Cagliari - viale Merello 92, 09123 Cagliari (Italy)

2011-10-15T23:59:59.000Z

290

hal-00189827,version2-16Feb2008 EPR argument and Bell inequalities for Bose-Einstein spin  

E-Print Network [OSTI]

hal-00189827,version2-16Feb2008 EPR argument and Bell inequalities for Bose-Einstein spin transposition of the EPR (Einstein-Podolsky-Rosen) argument to macroscopic physical quantities. The purpose, the celebrated Einstein-Podolsky-Rosen (EPR) argument [2]. Both have had an enormous influence in the discipline

Paris-Sud XI, Université de

291

A finite element method with mesh adaptivity for computing vortex states in fast-rotating Bose-Einstein condensates  

E-Print Network [OSTI]

-Einstein condensates Ionut Danaila,a,b , Fr´ed´eric Hechta,b aUPMC Univ Paris 06, UMR 7598, Laboratoire Jacques Abstract Numerical computations of stationary states of fast-rotating Bose-Einstein condensates require-Einstein condensate, vortex, Sobolev gradient, descent method. 1. Introduction Recent research efforts in the field

Boyer, Edmond

292

A finite element method with mesh adaptivity for computing vortex states in fastrotating BoseEinstein condensates  

E-Print Network [OSTI]

­Einstein condensates Ionut Danaila #,a,b , Frâ??edâ??eric Hecht a,b a UPMC Univ Paris 06, UMR 7598, Laboratoire Jacques Abstract Numerical computations of stationary states of fast­rotating Bose­Einstein condensates require­Einstein condensate, vortex, Sobolev gradient, descent method. 1. Introduction Recent research e#orts in the field

Recanati, Catherine

293

Bose-Einstein condensates near a microfabricated surface Microfabricated chips with current-carrying wires can confine ultracold atoms more  

E-Print Network [OSTI]

Bose-Einstein condensates near a microfabricated surface Microfabricated chips with current compared magnetically and optically confined Bose-Einstein condensates near a microfabricated surface [1 of the interaction between Bose-Einstein condensates and a microfabricated surface. Condensate fragmentation observed

294

Modulated amplitude waves with non-trivial phase in quasi-1D inhomogeneous Bose-Einstein condensates  

E-Print Network [OSTI]

-Einstein condensates Pedro J. Torres Departamento de Matem´atica Aplicada, Universidad de Granada, 18071 Granada describes the mean field dynamics of an elongated Bose-Einstein condensate and prove the existence of mod of the Ermakov-Pinney equation. Keywords: Bose-Einstein condensate; Gross-Pitaevskii equation; modulated

Arias, Cristina M.

295

Localized breathing solutions for BoseEinstein condensates in periodic traps. R. CarreteroGonzalez # and K. Promislow  

E-Print Network [OSTI]

Localized breathing solutions for Bose­Einstein condensates in periodic traps. R. Carretero6, Canada (June 1, 2001) We consider Bose­Einstein condensates confined by a pe­ riodic potential­ Einstein condensates (BECs) has triggered a vast inter­ est in the physics community. Novel techniques

296

Institute for Health Research and Policy Distinguished Lecture Pfizer Visiting Professorship of Clear Health Communication  

E-Print Network [OSTI]

Institute for Health Research and Policy Distinguished Lecture Pfizer Visiting Professorship of Clear Health Communication April 8, 2009 Matthew W. Kreuter, PhD, MPH Washington University in St. Louis St. Louis, MO Communication-based strategies to eliminate health disparities in diverse populations

Illinois at Chicago, University of

297

TEXAS A&M AGRILIFE TEXAS A&M DISTINGUISHED TEXAN IN AGRICULTURE AWARD  

E-Print Network [OSTI]

TEXAS A&M AGRILIFE TEXAS A&M DISTINGUISHED TEXAN IN AGRICULTURE AWARD The agricultural teaching a proud history of training leaders and providing leadership for the agricultural industry for the agricultural community. It is, therefore, fitting to recognize the efforts of Texans who have gained unique

298

White-etching matter in bearing steel Part 2: Distinguishing cause and eect in bearing steel  

E-Print Network [OSTI]

White-etching matter in bearing steel Part 2: Distinguishing cause and eect in bearing steel through a mechanism called "white-structure flaking", has triggered many studies of microstructural damage associated with "white-etching ar- eas" created during rolling contact fatigue, although whether

Cambridge, University of

299

Distinguishing human ethnic groups by means of sequences from Helicobacter pylori  

E-Print Network [OSTI]

Distinguishing human ethnic groups by means of sequences from Helicobacter pylori: Lessons from from Helicobacter pylori, a bacterium that colonizes the stomachs of most humans and is usually in this respect to classical human genetic markers. H. pylori from Buddhists and Muslims, the two major ethnic

Wirth, Thierry

300

Using Multiple Beams to Distinguish Radio Frequency Interference from SETI Signals  

E-Print Network [OSTI]

Using Multiple Beams to Distinguish Radio Frequency Interference from SETI Signals G. R. Harp Allen for extra-terrestrial intelligence) observations. It is a multi-beam instrument, with 16 independently steerable dual- polarization beams at 4 different tunings. Given 4 beams at one tuning, it is possible

Ellingson, Steven W.

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Fine scale structural variants distinguish the genomes of Drosophilia melanogaster and D. pseudoobscura  

E-Print Network [OSTI]

RESEARCH Open Access Fine scale structural variants distinguish the genomes of Drosophila melanogaster and D. pseudoobscura Stuart J Macdonald* and Anthony D Long Abstract Background: A primary objective of comparative genomics is to identify... genomic elements of functional significance that contribute to phenotypic diversity. Complex changes in genome structure (insertions, duplications, rearrangements, translocations) may be widespread, and have important effects on organismal diversity. Any...

Macdonald, Stuart J.

2006-07-07T23:59:59.000Z

302

Classifying Climbs in Soaring Flight Data 1 Data Mining to distinguish Wave vs. Thermal  

E-Print Network [OSTI]

Classifying Climbs in Soaring Flight Data 1 Data Mining to distinguish Wave vs. Thermal Climbs in Soaring Flight Data Alfred Ultsch and Rene Heise Databionics Research Group Philipps-University Marburg is a challenge for meteorological forecasting. To obtain precise measurement data on Mountain Waves is costly

303

Bose-Einstein condensation of atoms in a uniform potential  

E-Print Network [OSTI]

We have observed Bose-Einstein condensation of an atomic gas in the (quasi-)uniform three-dimensional potential of an optical box trap. Condensation is seen in the bimodal momentum distribution and the anisotropic time-of-flight expansion of the condensate. The critical temperature agrees with the theoretical prediction for a uniform Bose gas. The momentum distribution of our non-condensed quantum-degenerate gas is also clearly distinct from the conventional case of a harmonically trapped sample and close to the expected distribution in a uniform system. We confirm the coherence of our condensate in a matter-wave interference experiment. Our experiments open many new possibilities for fundamental studies of many-body physics.

Gaunt, Alexander L; Gotlibovych, Igor; Smith, Robert P; Hadzibabic, Zoran

2013-01-01T23:59:59.000Z

304

Bose-Einstein condensation of atoms in a uniform potential  

E-Print Network [OSTI]

We have observed Bose-Einstein condensation of an atomic gas in the (quasi-)uniform three-dimensional potential of an optical box trap. Condensation is seen in the bimodal momentum distribution and the anisotropic time-of-flight expansion of the condensate. The critical temperature agrees with the theoretical prediction for a uniform Bose gas. The momentum distribution of our non-condensed quantum-degenerate gas is also clearly distinct from the conventional case of a harmonically trapped sample and close to the expected distribution in a uniform system. We confirm the coherence of our condensate in a matter-wave interference experiment. Our experiments open many new possibilities for fundamental studies of many-body physics.

Alexander L. Gaunt; Tobias F. Schmidutz; Igor Gotlibovych; Robert P. Smith; Zoran Hadzibabic

2012-12-18T23:59:59.000Z

305

Josephson effects in a Bose–Einstein condensate of magnons  

SciTech Connect (OSTI)

A phenomenological theory is developed, that accounts for the collective dynamics of a Bose–Einstein condensate of magnons. In terms of such description we discuss the nature of spontaneous macroscopic interference between magnon clouds, highlighting the close relation between such effects and the well known Josephson effects. Using those ideas, we present a detailed calculation of the Josephson oscillations between two magnon clouds, spatially separated in a magnonic Josephson junction. -- Highlights: •We presented a theory that accounts for the collective dynamics of a magnon-BEC. •We discuss the nature of macroscopic interference between magnon-BEC clouds. •We remarked the close relation between the above phenomena and Josephson’s effect. •We remark the distinctive oscillations that characterize the Josephson oscillations.

Troncoso, Roberto E., E-mail: r.troncoso.c@gmail.com [Centro para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA, Avda. Ecuador 3493, Santiago 9170124 (Chile); Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 487-3, Santiago (Chile); Núñez, Álvaro S., E-mail: alnunez@dfi.uchile.cl [Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 487-3, Santiago (Chile)

2014-07-15T23:59:59.000Z

306

Bose-Einstein condensation in liquid 4He under pressure  

SciTech Connect (OSTI)

We present neutron scattering measurements of Bose-Einstein condensation, the atomic momen- tum distribution and Final State effects in liquid 4He under pressure. The condensate fraction at low temperature is found to decrease from n0 = 7.25 0.75% at SVP (p 0) to n0 = 3.2 0.75% at pressure p = 24 bar. This indicates an n0 = 3.0% in the liquid at the liquid/solid co-existence line (p = 25.3 bar). The atomic momentum distribution n(k) has high occupation of low k states and differs significantly from a Gaussian (e.g. a classical n(k)). Both n(k) and the Final state function broaden with increasing pressure, reflecting the increased localization of the 4He in space under increased pressure.

Glyde, Henry R [University of Delaware; Omar Diallo, Souleymane [ORNL; Azuah, Richard T [NIST Center for Neutron Research (NCRN), Gaithersburg, MD; Kirichek, Oleg [ISIS Facility, Rutherford Appleton Laboratory; Taylor, Jon W. [ISIS Facility, Rutherford Appleton Laboratory

2011-01-01T23:59:59.000Z

307

Fate of black branes in Einstein-Gauss-Bonnet gravity  

SciTech Connect (OSTI)

Black branes are studied in Einstein-Gauss-Bonnet gravity. Evaporation drives black branes toward one of two singularities depending on the sign of {alpha}, the Gauss-Bonnet coupling. For positive {alpha} and sufficiently large ratio {radical}({alpha})/L, where L/2{pi} is the radius of compactification, black branes avoid the Gregory-Laflamme (GL) instability before reaching a critical state. No black branes with the radius of horizon smaller than the critical value can exist. Approaching the critical state branes have a nonzero Hawking temperature. For negative {alpha} all black branes encounter the GL instability. No black branes may exist outside of the interval of the critical values 0{<=}{beta}<3, where {beta}=1-8{alpha}/r{sub h}{sup 2} and r{sub h} is the radius of horizon of the black brane. The first order phase transition line of GL transitions ends in a second order phase transition point at {beta}=0.

Suranyi, P.; Wijewardhana, L. C. R. [Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221-0011 (United States); Vaz, C. [Department of Physics, University of Cincinnati, Cincinnati, Ohio, 45221-0011 (United States); RWC, University of Cincinnati, Cincinnati, Ohio, 45221 (United States)

2009-06-15T23:59:59.000Z

308

A Bose-Einstein Model of Particle Multiplicity Distributions  

E-Print Network [OSTI]

A model of particle production is developed based on a parallel with a theory of Bose-Einstein condensation and similarities with other critical phenomena such as critical opalescence. The role of a power law critical exponent tau and Levy index alpha are studied. Various features of this model are developed and compared with other commonly used models of particle production which are shown to differ by having different values for tau, alpha. While void scaling is a feature of this model, hierarchical structure is not a general property of it. The value of the exponent tau=2 is a transition point associated with void and hierarchical scaling features. An exponent gamma is introduced to describe enhanced fluctuations near a critical point. Experimentally determined properties of the void scaling function can be used to determine tau.

A. Z. Mekjian; T. Csorgo; S. Hegyi

2006-12-19T23:59:59.000Z

309

Newton's cradle analogue with Bose-Einstein condensates  

E-Print Network [OSTI]

We propose a possible experimental realization of a quantum analogue of Newton's cradle using a configuration which starts from a Bose-Einstein condensate. The system consists of atoms with two internal states trapped in a one dimensional tube with a longitudinal optical lattice and maintained in a strong Tonks-Girardeau regime at maximal filling. In each site the wave function is a superposition of the two atomic states and a disturbance of the wave function propagates along the chain in analogy with the propagation of momentum in the classical Newton's cradle. The quantum travelling signal is generally deteriorated by dispersion, which is large for a uniform chain and is known to be zero for a suitably engineered chain, but the latter is hardly realizable in practice. Starting from these opposite situations we show how the coherent behaviour can be enhanced with minimal experimental effort.

Roberto Franzosi; Ruggero Vaia

2014-03-20T23:59:59.000Z

310

Josephson Junction Arrays with Bose-Einstein Condensates  

E-Print Network [OSTI]

We report on the direct observation of an oscillating atomic current in a one-dimensional array of Josephson junctions realized with an atomic Bose-Einstein condensate. The array is created by a laser standing-wave, with the condensates trapped in the valleys of the periodic potential and weakly coupled by the inter-well barriers. The coherence of multiple tunneling between adjacent wells is continuously probed by atomic interference. The square of the small-amplitude oscillation frequency is proportional to the microscopic tunneling rate of each condensate through the barriers, and provides a direct measurement of the Josephson critical current as a function of the intermediate barrier heights. Our superfluid array may allow investigation of phenomena so far inaccessible to superconducting Josephson junctions and lays a bridge between the condensate dynamics and the physics of discrete nonlinear media.

F. S. Cataliotti; S. Burger; C. Fort; P. Maddaloni; F. Minardi; A. Trombettoni; A. Smerzi; M. Inguscio

2001-08-07T23:59:59.000Z

311

Geometric Phase in a Bose-Einstein Josephson Junction  

E-Print Network [OSTI]

We calculate the geometric phase associated with the time evolution of the wave function of a Bose-Einstein condensate system in a double-well trap by using a model for tunneling between the wells. For a cyclic evolution, this phase is shown to be half the solid angle subtended by the evolution of a unit vector whose z component and azimuthal angle are given by the population difference and phase difference between the two condensates. For a non-cyclic evolution an additional phase term arises. We show that the geometric phase can also be obtained by mapping the tunneling equations onto the equations os a space curve. The importance of a geometric phase in the context of some recent experiments is pointed out.

Radha Balakrishnan; Mitaxi Mehta

2003-07-04T23:59:59.000Z

312

Gauge Drivers for the Generalized Harmonic Einstein Equations  

E-Print Network [OSTI]

The generalized harmonic representation of Einstein's equation is manifestly hyperbolic for a large class of gauge conditions. Unfortunately most of the useful gauges developed over the past several decades by the numerical relativity community are incompatible with the hyperbolicity of the equations in this form. This paper presents a new method of imposing gauge conditions that preserves hyperbolicity for a much wider class of conditions, including as special cases many of the standard ones used in numerical relativity: e.g., K-freezing, Gamma-freezing, Bona-Masso slicing, conformal Gamma-drivers, etc. Analytical and numerical results are presented which test the stability and the effectiveness of this new gauge driver evolution system.

Lee Lindblom; Keith D. Matthews; Oliver Rinne; Mark A. Scheel

2007-11-13T23:59:59.000Z

313

Holographic Superconductors from Einstein-Maxwell-Dilaton Gravity  

E-Print Network [OSTI]

We construct holographic superconductors from Einstein-Maxwell-dilaton gravity in 3+1 dimensions with two adjustable couplings $\\alpha$ and the charge $q$ carried by the scalar field. For the values of $\\alpha$ and $q$ we consider, there is always a critical temperature at which a second order phase transition occurs between a hairy black hole and the AdS RN black hole in the canonical ensemble, which can be identified with the superconducting phase transition of the dual field theory. We calculate the electric conductivity of the dual superconductor and find that for the values of $\\alpha$ and $q$ where $\\alpha/q$ is small the dual superconductor has similar properties to the minimal model, while for the values of $\\alpha$ and $q$ where $\\alpha/q$ is large enough, the electric conductivity of the dual superconductor exhibits novel properties at low frequencies where it shows a "Drude Peak" in the real part of the conductivity.

Yan Liu; Ya-Wen Sun

2010-07-07T23:59:59.000Z

314

Analogue gravitational phenomena in Bose-Einstein condensates  

E-Print Network [OSTI]

Analogue gravity is based on the simple observation that perturbations propagating in several physical systems can be described by a quantum field theory in a curved spacetime. While phenomena like Hawking radiation are hardly detectable in astrophysical black holes, these effects may be experimentally tested in analogue systems. In this Thesis, focusing on Bose-Einstein condensates, we present our recent results about analogue models of gravity from three main perspectives: as laboratory tests of quantum field theory in curved spacetime, for the techniques that they provide to address various issues in general relativity, and as toy models of quantum gravity. The robustness of Hawking-like particle creation is investigated in flows with a single black hole horizon. Furthermore, we find that condensates with two (white and black) horizons develop a dynamical instability known in general relativity as black hole laser effect. Using techniques borrowed from analogue gravity, we also show that warp drives, which...

Finazzi, Stefano

2012-01-01T23:59:59.000Z

315

Dynamics of vortices in weakly interacting Bose-Einstein condensates  

E-Print Network [OSTI]

We study the dynamics of vortices in ideal and weakly interacting Bose-Einstein condensates using a Ritz minimization method to solve the two-dimensional Gross-Pitaevskii equation. For different initial vortex configurations we calculate the trajectories of the vortices. We find conditions under which a vortex-antivortex pair annihilates and is created again. For the case of three vortices we show that at certain times two additional vortices may be created, which move through the condensate and annihilate each other again. For a noninteracting condensate this process is periodic, whereas for small interactions the essential features persist, but the periodicity is lost. The results are compared to exact numerical solutions of the Gross-Pitaevskii equation confirming our analytical findings.

Alexander Klein; Dieter Jaksch; Yanzhi Zhang; Weizhu Bao

2007-10-03T23:59:59.000Z

316

Bose Einstein condensation in a gas of the Fibonacci oscillators  

E-Print Network [OSTI]

We consider a system of the two-parameter deformed boson oscillators whose spectrum is given by a generalized Fibonacci sequence. In order to obtain the role of the deformation parameters (q1,q2) on the thermostatistics of the system, we calculate several thermostatistical functions in the thermodynamical limit and investigate the low-temperature behavior of the system. In this framework, we show that the thermostatistics of the (q1,q2)-bosons can be studied by the formalism of Fibonacci calculus which generalizes the recently proposed formalism of q-calculus. We also discuss the conditions under which the Bose-Einstein condensation would occur in the present two-parameter generalized boson gas. However, the ordinary boson gas results can be obtained by applying the limit q1=q2=1.

Abdullah Algin

2008-10-10T23:59:59.000Z

317

Bose-Einstein Condensates in the Large Gas Parameter Regime  

E-Print Network [OSTI]

Bose-Einstein condensates of 10$^4$ $^{85}$Rb atoms in a cylindrical trap are studied using a recently proposed modified Gross-Pitaevskii equation. The existence of a Feshbach resonance allows for widely tuning the scattering length of the atoms, and values of the peak gas parameter, $x_{pk}$, of the order of 10$^{-2}$ can be attained. We find large differences between the results of the modified Gross-Pitaevskii and of the standard Thomas-Fermi, and Gross-Pitaevskii equations in this region. The column densities at $z=0$ may differ by as much as $\\sim 30%$ and the half maximum radius by $\\sim 20%$. The scattering lengths estimated by fitting the half maximum radius within different approaches can differ by $\\sim 40%$.

A. Fabrocini; A. Polls

2001-01-25T23:59:59.000Z

318

Galilei covariance and Einstein's equivalence principle in quantum reference frames  

E-Print Network [OSTI]

The covariance of the Schr\\"odinger equation under Galilei boosts and the compatibility of nonrelativistic quantum mechanics with Einstein's equivalence principle have been constrained for so long to the existence of a superselection rule which would prevent a quantum particle to be found in superposition states of different masses. In a effort to avoid this expedient, thus allowing for nonrelativistic quantum mechanics to account for unstable particles, recent works have suggested that usual Galilean transformations are inconsistent with the nonrelativistic limit of the Lorentz transformation. Here we approach the issue in a fundamentally different way. Using a formalism of unitary transformations and employing quantum reference frames rather than immaterial coordinate systems, we show that the Schr\\"odinger equation, although form-variant, is fully compatible with the aforementioned principles of relativity.

S. T. Pereira; R. M. Angelo

2014-04-10T23:59:59.000Z

319

Optical computing with soliton trains in Bose-Einstein condensates  

E-Print Network [OSTI]

Optical computing devices can be implemented based on controlled generation of soliton trains in single and multicomponent Bose-Einstein condensates (BEC). Our concepts utilize the phenomenon that the frequency of soliton trains in BEC can be governed by changing interactions within the atom cloud. We use this property to store numbers in terms of those frequencies for a short time until observation. The properties of soliton trains can be changed in an intended way by other components of BEC occupying comparable states or via phase engineering. We elucidate in which sense such an additional degree of freedom can be regarded as a tool for controlled manipulation of data. Finally the outcome of any manipulation made is read out by observing the signature within the density profile.

Florian Pinsker

2014-11-18T23:59:59.000Z

320

Test of the Stokes-Einstein relation in a two-dimensional Yukawa liquid  

E-Print Network [OSTI]

The Stokes-Einstein relation, relating the diffusion and viscosity coefficients D and eta, is tested in two dimensions. An equilibrium molecular-dynamics simulation was used with a Yukawa pair potential. Regimes are identified where motion is diffusive and D is meaningful. The Stokes-Einstein relation, D ~ kT, was found to be violated near the disordering transition; under these conditions collective particle motion exhibits dynamical heterogeneity. At slightly higher temperatures, however, the Stokes-Einstein relation is valid. These results may be testable in strongly-coupled dusty plasma experiments.

Bin Liu; J. Goree

2005-11-08T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Stability of the Einstein static universe in the presence of vacuum energy  

SciTech Connect (OSTI)

The Einstein static universe has played a central role in a number of emergent scenarios recently put forward to deal with the singular origin of the standard cosmological model. Here we study the existence and stability of the Einstein static solution in the presence of vacuum energy corresponding to conformally invariant fields. We show that the presence of vacuum energy stabilizes this solution by changing it to a center equilibrium point, which is cyclically stable. This allows nonsingular emergent cosmological models to be constructed in which initially the Universe oscillates indefinitely about an initial Einstein static solution and is thus past eternal.

Carneiro, Saulo [Astronomy Unit, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS (United Kingdom); Instituto de Fisica, Universidade Federal da Bahia, Salvador, BA, 40210-340 (Brazil); Tavakol, Reza [Astronomy Unit, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS (United Kingdom)

2009-08-15T23:59:59.000Z

322

Detecting Beyond-Einstein Polarizations of Continuous Gravitational Waves  

E-Print Network [OSTI]

The direct detection of gravitational waves with the next generation detectors, like Advanced LIGO, provides the opportunity to measure deviations from the predictions of General Relativity. One such departure would be the existence of alternative polarizations. To measure these, we study a single detector measurement of a continuous gravitational wave from a triaxial pulsar source. We develop methods to detect signals of any polarization content and distinguish between them in a model independent way. We present LIGO S5 sensitivity estimates for 115 pulsars.

Isi, Maximiliano; Mead, Carver; Pitkin, Matthew

2015-01-01T23:59:59.000Z

323

Conformally flat Einstein-Yang-Mills-Higgs solutions with spherical symmetry  

SciTech Connect (OSTI)

We solve the Einstein-Yang-Mills-Higgs equations in a conformally flat metric with spherical symmetry. Two solutions are obtained corresponding to magnetic monopoles in the Higgs vacuum and outside of it.

Mondaini, R.P.; Santos, N.O.

1983-10-15T23:59:59.000Z

324

Ghost-Free Massive $f(R)$ Theories Modelled as Effective Einstein Spaces and Cosmic Acceleration  

E-Print Network [OSTI]

We study how massive ghost-free gravity $f(R)$-modified theories, MGFTs, can be encoded into generic off-diagonal Einstein spaces. Using "auxiliary" connections completely defined by the metric fields and adapted to nonholonomic frames with associated nonlinear connection structure, we decouple and integrate in certain general forms the field equations in MGFT. Imposing additional nonholonomic constraints, we can generate Levi-Civita, LC, configurations and mimic MGFT effects via off-diagonal interactions of effective Einstein and/or Einstein-Cartan gravity with nonholonomically induced torsion. We show that imposing nonholonomic constraints it is possible reproduce very specific models of massive $f(R)$ gravity studied in \\cite{sarid,odintsr}. The cosmological evolution of ghost-free off-diagonal Einstein spaces is investigated. Certain compatibility of MGFT cosmology to small off--diagonal deformations of $\\Lambda $CDM models is established.

Sergiu I. Vacaru

2014-10-15T23:59:59.000Z

325

Experiments with Bose-Einstein condensates in a double-well potential  

E-Print Network [OSTI]

Trapped atom interferometry was demonstrated with Bose-Einstein condensates in an optical double-well trap. Coherent splitting of trapped condensates was performed by deforming an optical single-well potential into a ...

Shin, Yong-Il

2006-01-01T23:59:59.000Z

326

Evidence for a critical velocity in a Bose-Einstein condensed gas  

E-Print Network [OSTI]

We have studied dissipation in a Bose--Einstein condensed gas by moving a blue detuned laser beam through the condensate at different velocities. Strong heating was observed only above a critical velocity.

C. Raman; M. Kohl; R. Onofrio; D. S. Durfee; C. E. Kuklewicz; Z. Hadzibabic; W. Ketterle

1999-09-07T23:59:59.000Z

327

Evolution and dynamical properties of Bose-Einstein condensate dark matter stars  

E-Print Network [OSTI]

Using recently developed nonrelativistic numerical simulation code, we investigate the stability properties of compact astrophysical objects that may be formed due to the Bose-Einstein condensation of dark matter. Once the temperature of a boson gas is less than the critical temperature, a Bose-Einstein condensation process can always take place during the cosmic history of the universe. Due to dark matter accretion, a Bose-Einstein condensed core can also be formed inside massive astrophysical objects such as neutron stars or white dwarfs, for example. Numerically solving the Gross-Pitaevskii-Poisson system of coupled differential equations, we demonstrate, with longer simulation runs, that within the computational limits of the simulation the objects we investigate are stable. Physical properties of a self-gravitating Bose-Einstein condensate are examined both in non-rotating and rotating cases.

Eniko J. M. Madarassy; Viktor T. Toth

2014-12-22T23:59:59.000Z

328

Colliding and moving Bose-Einstein condensates : studies of superfluidity and optical tweezers for condensate transport  

E-Print Network [OSTI]

In this thesis, two different sets of experiments are described. The first is an exploration of the microscopic superfluidity of dilute gaseous Bose-Einstein condensates. The second set of experiments were performed using ...

Chikkatur, Ananth P., 1975-

2003-01-01T23:59:59.000Z

329

Event-Based Computer Simulation Model of Aspect-Type Experiments Strictly Satisfying Einstein's Locality Conditions  

E-Print Network [OSTI]

Event-Based Computer Simulation Model of Aspect-Type Experiments Strictly Satisfying Einstein­Podolsky­Rosen­Bohm experiments with photons, we construct an event-based simulation model in which every essential element

330

Bose-Einstein condensates in optical lattices : the superfluid to Mott insulator phase transition  

E-Print Network [OSTI]

87Rb Bose Einstein Condensate in 3D optical lattice was studied in the regime of weak interaction(the superfluid phase) and strong interaction(the Mott insulating phase). The stability of superfluid currents was studied ...

Mun, Jongchul

2008-01-01T23:59:59.000Z

331

Distinguishing a SM-like MSSM Higgs boson from SM Higgs boson at muon collider  

E-Print Network [OSTI]

We explore the possibility of distinguishing the SM-like MSSM Higgs boson from the SM Higgs boson via Higgs boson pair production at future muon collider. We study the behavior of the production cross section in SM and MSSM with Higgs boson mass for various choices of MSSM parameters tan \\beta and m\\sub A. We observe that at fixed CM energy, in the SM, the total cross section increases with the increase in Higgs boson mass whereas this trend is reversed for the MSSM case. The changes that occur for the MSSM case in comparison to the SM predictions are quantified in terms of the relative percentage deviation in cross section. The observed large deviations in cross section for different choices of Higgs mass suggest that the measurements of the cross section could possibly distinguish the SM-like MSSM Higgs boson from the SM Higgs boson.

Jai Kumar Singhal; Sardar Singh; Ashok K Nagawat

2005-07-26T23:59:59.000Z

332

Water value in power generation: Experts distinguish water use and consumption  

E-Print Network [OSTI]

Winter 2013 tx H2O 11 ] Story by Danielle Kalisek In Grimes County, the sun sets over Gibbons Creek Reservoir, the cooling water supply for an adjacent power plant. Photo by Leslie Lee. WATER VALUE IN POWER GENERATION Experts distinguish... water use and consumption Having enough water available for municipal and agricultural needs is o#23;en discussed; however, having the water needed to generate electric power and the electricity needed to treat and transport water is a struggle all...

Kalisek, D

2013-01-01T23:59:59.000Z

333

ccsd-00000553(version1):29Aug2003 L'ARGUMENT EINSTEIN PODOLSKY ROSEN (EPR)  

E-Print Network [OSTI]

ccsd-00000553(version1):29Aug2003 L'ARGUMENT EINSTEIN PODOLSKY ROSEN (EPR) : PARADOXE, ALTERNATIVE montre clairement. On ne doit pas aujourd'hui lui faire dire le contraire. L'article EPR (A. Einstein, B, Wigner et jusqu'`a aujourd'hui, la r´eponse `a EPR a ´et´e le recours renouvel´e `a l

Paris-Sud XI, Université de

334

Transition of a mesoscopic bosonic gas into a Bose-Einstein condensate  

E-Print Network [OSTI]

The condensate number distribution during the transition of a dilute, weakly interacting gas of N=200 bosonic atoms into a Bose-Einstein condensate is modeled within number conserving master equation theory of Bose-Einstein condensation. Initial strong quantum fluctuations occuring during the exponential cycle of condensate growth reduce in a subsequent saturation stage, before the Bose gas finally relaxes towards the Gibbs-Boltzmann equilibrium.

Alexej Schelle

2011-11-03T23:59:59.000Z

335

A. Galip Ulsoy, C.D. Mote, Jr. Distinguished University Professor! and the William Clay Ford Professor of Manufacturing!  

E-Print Network [OSTI]

of Autonomous Vehicles ·#Concluding Remarks ·#Acknowledgements #12;A. Galip Ulsoy, C.D. Mote, Jr. Distinguished of Autonomous Vehicles ·#Concluding Remarks ·#Acknowledgements A. Galip Ulsoy, C.D. Mote, Jr. Distinguished emerging technologies that will change the world." [MIT Technology Review, Feb. 2003], e.g. fuel injection

Ulsoy, A. Galip

336

Violations of Einstein's Relativity: Motivations, Theory, and Phenomenology  

E-Print Network [OSTI]

One of the most difficult questions in present-day physics concerns a fundamental theory of space, time, and matter that incorporates a consistent quantum description of gravity. There are various theoretical approaches to such a quantum-gravity theory. Nevertheless, experimental progress is hampered in this research field because many models predict deviations from established physics that are suppressed by some power of the Planck scale, which currently appears to be immeasurably small. However, tests of relativity theory provide one promising avenue to overcome this phenomenological obstacle: many models for underlying physics can accommodate a small breakdown of Lorentz symmetry, and numerous feasible Lorentz-symmetry tests have Planck reach. Such mild violations of Einstein's relativity have therefore become a focus of recent research efforts. This presentation provides a brief survey of the key ideas in this research field and is geared at both experimentalists and theorists. In particular, several theoretical mechanisms leading to deviations from relativity theory are presented; the standard theoretical framework for relativity violations at currently accessible energy scales (i.e., the SME) is reviewed, and various present and near-future experimental efforts within this field are discussed.

Ralf Lehnert

2011-02-17T23:59:59.000Z

337

The Einstein Equation on the 3-Brane World  

E-Print Network [OSTI]

We carefully investigate the gravitational equations of the brane world, in which all the matter forces except gravity are confined on the 3-brane in a 5-dimensional spacetime with $Z_2$ symmetry. We derive the effective gravitational equations on the brane, which reduce to the conventional Einstein equations in the low energy limit. From our general argument we conclude that the first Randall & Sundrum-type theory (RS1) [hep-ph/9905221] predicts that the brane with the negative tension is an anti-gravity world and hence should be excluded from the physical point of view. Their second-type theory (RS2)[hep-th/9906064] where the brane has the positive tension provides the correct signature of gravity. In this latter case, if the bulk spacetime is exactly anti-de Sitter, generically the matter on the brane is required to be spatially homogeneous because of the Bianchi identities. By allowing deviations from anti-de Sitter in the bulk, the situation will be relaxed and the Bianchi identities give just the re...

Shiromizu, T; Sasaki, M; Shiromizu, Tetsuya; Maeda, Kei-ichi; Sasaki, Misao

2000-01-01T23:59:59.000Z

338

Quantum dynamics of the Einstein-Rosen wormhole throat  

E-Print Network [OSTI]

We consider the polymer quantization of the Einstein wormhole throat theory for an eternal Schwarzschild black hole. We numerically solve the difference equation describing the quantum evolution of an initially Gaussian, semi-classical wave packet. As expected from previous work on loop quantum cosmology, the wave packet remains semi-classical until it nears the classical singularity at which point it enters a quantum regime in which the fluctuations become large. The expectation value of the radius reaches a minimum as the wave packet is reflected from the origin and emerges to form a near Gaussian but asymmetrical semi-classical state at late times. The value of the minimum depends in a non-trivial way on the initial mass/energy of the pulse, its width and the polymerization scale. For wave packets that are sufficiently narrow near the bounce, the semi-classical bounce radius is obtained. Although the numerics become difficult to control in this limit, we argue that for pulses of finite width the bounce persists as the polymerization scale goes to zero, suggesting that in this model the loop quantum gravity effects mimicked by polymer quantization do not play a crucial role in the quantum bounce.

Gabor Kunstatter; Jorma Louko; Ari Peltola

2011-02-26T23:59:59.000Z

339

Acoustic white holes in flowing atomic Bose-Einstein condensates  

E-Print Network [OSTI]

We study acoustic white holes in a steadily flowing atomic Bose-Einstein condensate. A white hole configuration is obtained when the flow velocity goes from a super-sonic value in the upstream region to a sub-sonic one in the downstream region. The scattering of phonon wavepackets on a white hole horizon is numerically studied in terms of the Gross-Pitaevskii equation of mean-field theory: dynamical stability of the acoustic white hole is found, as well as a signature of a nonlinear back-action of the incident phonon wavepacket onto the horizon. The correlation pattern of density fluctuations is numerically studied by means of the truncated-Wigner method which includes quantum fluctuations. Signatures of the white hole radiation of correlated phonon pairs by the horizon are characterized; analogies and differences with Hawking radiation from acoustic black holes are discussed. In particular, a short wavelength feature is identified in the density correlation function, whose amplitude steadily grows in time since the formation of the horizon. The numerical observations are quantitatively interpreted by means of an analytical Bogoliubov theory of quantum fluctuations for a white hole configuration within the step-like horizon approximation.

Carlos Mayoral; Alessio Recati; Alessandro Fabbri; Renaud Parentani; Roberto Balbinot; Iacopo Carusotto

2010-09-30T23:59:59.000Z

340

Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate  

E-Print Network [OSTI]

The precision of compact inertial sensing schemes using trapped- and guided-atom interferometers has been limited by uncontrolled phase errors caused by trapping potentials and interactions. Here, we propose an acoustic interferometer that uses sound waves in a toroidal Bose-Einstein condensate to measure rotation, and we demonstrate experimentally several key aspects of this type of interferometer. We use spatially patterned light beams to excite counter-propagating sound waves within the condensate and use \\emph{in situ} absorption imaging to characterize their evolution. We present an analysis technique by which we extract separately the oscillation frequencies of the standing-wave acoustic modes, the frequency splitting caused by static imperfections in the trapping potential, and the characteristic precession of the standing-wave pattern due to rotation. Supported by analytic and numerical calculations, we interpret the noise in our measurements, which is dominated by atom shot noise, in terms of rotation noise. While the noise of our acoustic interferometric sensor, at the level of $\\sim \\mbox{rad}\\, \\mbox{s}^{-1}/\\sqrt{\\mbox{Hz}}$, is high owing to rapid acoustic damping and the small radius of the trap, the proof-of-concept device does operate at $10^4 - 10^6$ times higher density and in a volume $10^9$ times smaller than free-falling atom interferometers.

G. Edward Marti; Ryan Olf; Dan M. Stamper-Kurn

2014-06-26T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Emergent gravitational dynamics in relativistic Bose--Einstein condensate  

E-Print Network [OSTI]

Analogue models of gravity have played a pivotal role in the past years by providing a test bench for many open issues in quantum field theory in curved spacetime such as the robustness of Hawking radiation and cosmological particle production. More recently, the same models have offered a valuable framework within which current ideas about the emergence of spacetime and its dynamics could be discussed via convenient toy models. In this context, we study here an analogue gravity system based on a relativistic Bose--Einstein condensate. We show that in a suitable limit this system provides not only an example of an emergent spacetime (with a massive and a massless relativistic fields propagating on it) but also that such spacetime is governed by an equation with geometric meaning that takes the familiar form of Nordstr{\\"o}m theory of gravitation. In this equation the gravitational field is sourced by the expectation value of the trace of the effective stress energy tensor of the quasiparticles while the Newton and cosmological constants are functions of the fundamental scales of the microscopic system. This is the first example of analogue gravity in which a Lorentz invariant, geometric theory of semiclassical gravity emerges from an underlying quantum theory of matter in flat spacetime.

Alessio Belenchia; Stefano Liberati; Arif Mohd

2014-10-22T23:59:59.000Z

342

Planck-scale effects on Bose-Einstein condensates  

E-Print Network [OSTI]

The effects of a Planck-scale deformation of the Minkowski energy-momentum dispersion relation on the phenomenology of non-trapped Bose-Einstein condensates (BECs) are examined. Such a deformation is shown to cause a shift in the condensation temperature $T_{c}$ of the BEC and, for a specific functional form of deformation, this shift can be as large as the current measured precision on $T_{c}$. For a $_{37}^{85}Rb$ cold-atom BEC with a particle density $n\\simeq 10^{12}cm^{-3}$ we find a fractional shift of order $10^{-4}$, but this can be much larger for even more dilute BECs. We discuss the possibility of planning specific experiments with BECs that might provide phenomenological constraints on Planck-scale physics. These corrections to $T_{c}$ are found to be extremely small for ultrarelativistic BECs implying that, in some cases, Planck-scale effects may be more important in low- rather than high-energy processes.

F. Briscese; M. Grether; M. de Llano

2012-06-20T23:59:59.000Z

343

Addendum to Distinguishing Spins in Decay Chains at the Large Hadron Collider.  

E-Print Network [OSTI]

ar X iv :h ep -p h/ 06 06 21 2v 1 2 0 Ju n 20 06 Preprint typeset in JHEP style - PAPER VERSION Cavendish–HEP–06/15 Addendum to “Distinguishing Spins in Decay Chains at the Large Hadron Collider”? Christiana Athanasiou1, Christopher G. Lester2... mass distributions of the three observable two-body combinations: dileptons (mll), quark- or antiquark-jet plus positive lepton (mjl+), and jet plus negative lepton (mjl?).1 If P (m|S) represents the normalized probability distribution of any one...

Athanasiou, Christiana; Lester, Christopher G; Smillie, Jennifer M; Webber, Bryan R

344

Answer to Question 55: Are there pictorial examples that distinguish covariant and contravariant vectors?  

E-Print Network [OSTI]

We present pictorial means of distinguishing contravariant vectors (or simply vectors) from covariant vectors (or linear forms). When one depicts vector as the directed segment, then the pictorial image of a linear form is a family of equidistant parallel planes with an arrow joining the neighbouring planes and showing the direction of increase of the form. First of these planes is the linear subspace of dimension two on which the linear form gives value zero. Several examples of physical quantities are given which are naturally vectors, and others which are naturally linear forms.

Bernard Jancewicz

1998-07-17T23:59:59.000Z

345

Charged black holes in expanding Einstein-de Sitter universes  

E-Print Network [OSTI]

Inspired in a previous work by McClure and Dyer (Classical Quantum Gravity 23, 1971 (2006)), we analyze some solutions of the Einstein-Maxwell equations which were originally written to describe charged black holes in cosmological backgrounds. A detailed analysis of the electromagnetic sources for a sufficiently general metric is performed, and then we focus on deriving the electromagnetic four-current as well as the conserved electric charge of each metric. The charged McVittie solution is revisited and a brief study of its causal structure is performed, showing that it may represent a charged black hole in an expanding universe, with the black hole horizon being formed at infinite late times. Charged versions of solutions originally put forward by Vaidya (Vd) and Sultana and Dyer (SD) are also analyzed. It is shown that the charged Sultana-Dyer metric requires a global electric current, besides a central (pointlike) electric charge. With the aim of comparing to the charged McVittie metric, new charged solutions of Vd and SD type are considered. In these cases, the original mass and charge parameters are replaced by particular functions of the cosmological time. In the new generalized charged Vaidya metric the black hole horizon never forms, whereas in the new generalized Sultana-Dyer case both the Cauchy and the black hole horizons develop at infinite late times. A charged version of the Thakurta metric is also studied here. It is also a new solution. As in the charged Sultana-Dyer case, the natural source of the electromagnetic field is a central electric charge with an additional global electric current. The global structure is briefly studied and it is verified that the corresponding spacetime may represent a charged black hole in a cosmological background. All the solutions present initial singularities as found in the McVittie metric.

Manuela G. Rodrigues; Vilson T. Zanchin

2015-02-02T23:59:59.000Z

346

COLLOQUIUM: "The Usefulness of Useless Knowledge": The History...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

scholars including Albert Einstein, Erwin Panofsky, John von Neumann, J. Robert Oppenheimer, Freeman Dyson, Kurt Gdel, George Kennan, Clifford Geertz, Joan Wallach Scott,...

347

EPR, kvantemekanik og Bohr.  

E-Print Network [OSTI]

??Dette projekt omhandler området hvor filosofi og fysik smelter sammen. Kvantemekanikkens tilblivelse fik en hård medfart hvilket diskussionerne mellem især Albert Einstein og Niels Bohr… (more)

Nielsen, Morten Klockmann

2007-01-01T23:59:59.000Z

348

Distinguishing Flavor Non-universal Colorons from Z' Bosons at the LHC  

E-Print Network [OSTI]

Electrically-neutral massive color-singlet and color-octet vector bosons, which are often predicted in Beyond the Standard Model theories, have the potential to be discovered as dijet resonances at the LHC. A color-singlet resonance that has leptophobic couplings needs further investigation to be distinguished from a color-octet one. In previous work, we introduced a method for discriminating between the two kinds of resonances when their couplings are flavor-universal, using measurements of the dijet resonance mass, total decay width and production cross-section. Here, we describe an extension of that method to cover a more general scenario, in which the vector resonances could have flavor non-universal couplings; essentially, we incorporate measurements of the heavy-flavor decays of the resonance into the method. We present our analysis in a model-independent manner for a dijet resonance with mass 2.5-6.0 TeV at the LHC with $\\sqrt{s}=14$ TeV and integrated luminosities 30, 100, 300 and 1000 ${\\rm fb}^{-1}$, and show that the measurements of the heavy-flavor decays should allow conclusive identification of the vector boson. Note that our method is generally applicable even for a Z' boson with non-Standard invisible decays. We include an appendix of results for various resonance couplings and masses to illustrate how well each observable must be measured to distinguish colorons from Z' bosons.

R. Sekhar Chivukula; Pawin Ittisamai; Elizabeth H. Simmons

2015-02-17T23:59:59.000Z

349

Colorado SChool of MineS We are Colorado School of Mines. Full of pride in our distinguished history. Full  

E-Print Network [OSTI]

distinguished history. Full of confidence in our expertise today. Full of drive to make a positive impact's most pressing energy and environmental challenges. Founded in 1874, the institution was established

350

Use of X-ray Absorption Spectroscopy to Distinguish Between Inner And Outer-sphere Pb Adsorption Complexes on Montmorillonite  

E-Print Network [OSTI]

Use of X-ray Absorption Spectroscopy to Distinguish Between Inner And Outer-sphere Pb Adsorption on the functional groups at the edges of the montmorillonite. At I = 0.002 M Pb absorption was less dependent

Sparks, Donald L.

351

Observation of Fractional Stokes-Einstein Behavior in the Simplest Hydrogen-bonded Liquid  

SciTech Connect (OSTI)

Quasielastic neutron scattering has been used to investigate the single-particle dynamics of hydrogen fluoride across its entire liquid range at ambient pressure. For T > 230 K, translational diffusion obeys the celebrated Stokes-Einstein relation, in agreement with nuclear magnetic resonance studies. At lower temperatures, we find significant deviations from the above behavior in the form of a power law with exponent xi = -0.71+/-0.05. More striking than the above is a complete breakdown of the Debye-Stokes-Einstein relation for rotational diffusion. Our findings provide the first experimental verification of fractional Stokes-Einstein behavior in a hydrogen-bonded liquid, in agreement with recent computer simulations.

Herwig, Kenneth W [ORNL; Molaison, Jamie J [ORNL; Fernandez-Alonso, F. [ISIS Facility, Rutherford Appleton Laboratory; Bermejo, F. J. [CSIC - Inst. Estructura de la Materia & Dept. of Electricity and Electronics; Turner, John F. C. [University of Tennessee, Knoxville (UTK); McLain, Sylvia E. [ISIS Facility, Rutherford Appleton Laboratory

2007-01-01T23:59:59.000Z

352

Undoing the twist: the Ho?ava limit of Einstein-aether  

E-Print Network [OSTI]

We show that Ho\\v{r}ava gravity can be obtained from Einstein-aether theory in the limit that the twist coupling constant goes to infinity, while holding fixed the expansion, shear and acceleration couplings. This limit helps to clarify the relation between the two theories, and allows Ho\\v{r}ava results to be obtained from Einstein-aether ones. The limit is illustrated with several examples, including rotating black hole equations, PPN parameters, and radiation rates from binary systems.

Ted Jacobson

2014-03-23T23:59:59.000Z

353

Future geodesic completeness of some spatially homogeneous solutions of the vacuum Einstein equations in higher dimensions  

E-Print Network [OSTI]

It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.

Arne Goedeke; Alan D. Rendall

2010-02-21T23:59:59.000Z

354

Exact solutions of three dimensional black holes: Einstein gravity vs F(R) gravity  

E-Print Network [OSTI]

In this paper, we consider Einstein gravity in the presence of a class of nonlinear electrodynamics, called power Maxwell invariant (PMI). We take into account $(2+1)$-dimensional spacetime in Einstein-PMI gravity and obtain its black hole solutions. Then, we regard pure $F(R)$ gravity as well as $F(R)$-conformally invariant Maxwell theory to obtain exact solutions of the field equations with black hole interpretation. Finally, we investigate the conserved and thermodynamic quantities and discuss about the first law of thermodynamics for the mentioned gravitational models.

S. H. Hendi; B. Eslam Panah; R. Saffari

2014-10-28T23:59:59.000Z

355

The Second Law in 4D Einstein-Gauss-Bonnet Gravity  

E-Print Network [OSTI]

The topological contribution to black hole entropy of a Gauss-Bonnet term in four dimensions opens up the possibility of a violation of the second law of thermodynamics in black hole mergers. We show, however, that the second law is not violated in the regime where Einstein-Gauss-Bonnet holds as an effective theory and black holes can be treated thermodynamically. For mergers of AdS black holes, the second law appears to be violated even in Einstein gravity; we argue, however, that the second law holds when gravitational potential energy is taken into account.

Saugata Chatterjee; Maulik Parikh

2015-01-21T23:59:59.000Z

356

Manipulating Quantum States of Molecules Created via Photoassociation of Bose-Einstein Condensates  

E-Print Network [OSTI]

We show the quantum state transfer technique in two-color photoassociation (PA) of a Bose-Einstein condensate, where a quantized field is used to couple the free-bound transition from atom state to excited molecular state. Under the weak excitation condition, we find that quantum states of the quantized field can be transferred to the created molecular condensate. The feasibility of this technique is confirmed by considering the atomic and molecular decays discovered in the current PA experiments. The present results allow us to manipulate quantum states of molecules in the photoassociation of a Bose-Einstein condensate.

Xiao-Ting Zhou; Xiong-Jun Liu; Hui Jing; C. H. Lai; C. H. Oh

2007-01-14T23:59:59.000Z

357

Control of a Bose-Einstein condensate by dissipation: Nonlinear Zeno effect  

SciTech Connect (OSTI)

We show that controlled dissipation can be used as a tool for exploring fundamental phenomena and managing mesoscopic systems of cold atoms and Bose-Einstein condensates. Even the simplest boson-Josephson junction, that is, a Bose-Einstein condensate in a double-well trap, subjected to removal of atoms from one of the two potential minima allows one to observe such phenomena as the suppression of losses and the nonlinear Zeno effect. In such a system the controlled dissipation can be used to create desired macroscopic states and implement controlled switching among different quantum regimes.

Shchesnovich, V. S. [Centro de Ciencias Naturais e Humanas, Universidade Federal do ABC, Santo Andre, SP 09210-170 (Brazil); Konotop, V. V. [Centro de Fisica Teorica e Computacional, Universidade de Lisboa, Avenida Professor Gama Pinto 2, Lisboa P-1649-003, Portugal and Departamento de Fisica, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, Ed. C8, Piso 6, Lisboa P-1749-016 (Portugal)

2010-05-15T23:59:59.000Z

358

Comments on the Unification of Electromagnetism and Gravitation through "Generalized Einstein manifolds"  

E-Print Network [OSTI]

H. Akbar-Zadeh has recently proposed (J Geom Phys 17 (1995) 342) a new geometric formulation of Einstein-Maxwell system with source in terms of what are called "Generalized Einstein manifolds". We show that, contrary to the claim, Maxwell equations have not been derived in this formulation and that, the assumed equations can be identified only as source-free Maxwell equations in the proposed geometric set up. A genuine derivation of source-free Maxwell equations is presented within the same framework. We draw a conclusion that the proposed unification scheme can pertain only to source-free situations.

M. Panahi; M. Mehrafarin

1998-01-19T23:59:59.000Z

359

Bose-Einstein Condensation of Magnons under Incoherent Pumping A. V. Chumak,1,* G. A. Melkov,1  

E-Print Network [OSTI]

Bose-Einstein Condensation of Magnons under Incoherent Pumping A. V. Chumak,1,* G. A. Melkov,1 V. E; published 7 May 2009) Bose-Einstein condensation in a gas of magnons pumped by an incoherent pumping source of bosons under conditions of incoherent pumping. The critical transition point is shown to be almost

Demokritov, S.O.

360

Numerical methods for computing the ground state of spin-1 Bose-Einstein condensates in a uniform magnetic field  

E-Print Network [OSTI]

Numerical methods for computing the ground state of spin-1 Bose-Einstein condensates in a uniform for computing the ground-state solution of spin-1 Bose-Einstein condensates subjected to a uniform magnetic to compute the condensate ground state in a harmonic plus optical lattice potential, and the effect

Bao, Weizhu

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Coherence properties of Bose-Einstein condensates and atom lasers Wolfgang Ketterle and Hans-Joachim Miesner  

E-Print Network [OSTI]

Coherence properties of Bose-Einstein condensates and atom lasers Wolfgang Ketterle and Hans of a Bose-Einstein condensate, and summarize the experimental evidence obtained thus far. It is shown that the mean-field energy of a condensate is a measure of second-order coherence. ``Release

362

BoseEinstein condensates in spatially periodic potentials Kirstine BergSrensen 1 and Klaus Mlmer 2  

E-Print Network [OSTI]

Bose­Einstein condensates in spatially periodic potentials Kirstine Berg­Sørensen 1 and Klaus theoretically the properties of a Bose­Einstein condensate located in a spatially periodic potential. The excitations of the condensate are obtained from linear equations involving the periodic potential

Berg-Sørensen, Kirstine

363

BoseEinstein condensates in spatially periodic potentials Kirstine BergSrensen 1 and Klaus Mlmer 2  

E-Print Network [OSTI]

Bose­Einstein condensates in spatially periodic potentials Kirstine Berg­Sørensen 1 and Klaus Bose­Einstein condensation in trapped dilute gases 1, 2, 3 was observed only recently. Nevertheless, the experimental developments in this field have advanced rapidly, and the properties of condensates in different

Berg-Sørensen, Kirstine

364

ccsd-00005538,version2-12Nov2005 Observation of Phase Defects in Quasi-2D Bose-Einstein Condensates  

E-Print Network [OSTI]

ccsd-00005538,version2-12Nov2005 Observation of Phase Defects in Quasi-2D Bose-Einstein Condensates in quasi-2D Bose-Einstein condensates close to the condensation temperature. Either a single or several equally spaced condensates are produced by selectively evaporating the sites of a 1D optical lattice. When

Boyer, Edmond

365

arXiv:cond-mat/9904034v25Apr1999 Making, probing and understanding Bose-Einstein condensates  

E-Print Network [OSTI]

arXiv:cond-mat/9904034v25Apr1999 Making, probing and understanding Bose-Einstein condensates W-Einstein condensation (BEC) in dilute atomic gases [1, 2, 3, 4, 5] achieved several long-standing goals. First, neutral condensates, refs. [9, 10, 11] contain a more complete account on the cooling and trapping techniques

Hart, Gus

366

Propagation of Bose-Einstein condensates in a magnetic waveguide Progress in the field of atom optics depends on developing improved sources of matter  

E-Print Network [OSTI]

Propagation of Bose-Einstein condensates in a magnetic waveguide Progress in the field of atom. Miniaturizing the current carrying structures used to confine Bose-Einstein condensates offer prospects for finer control over the clouds. We have demonstrated that a gaseous Bose-Einstein condensate transported

367

Atom interferometry with Bose-Einstein condensates in a double-well The applicability, accuracy, and sensitivity of atom interferometers may be improved  

E-Print Network [OSTI]

Atom interferometry with Bose-Einstein condensates in a double-well potential The applicability properties of gaseous Bose-Einstein condensates in combination with the fine manipulation capabilities created a trapped-atom interferometer using gaseous Bose-Einstein condensates coherently split

368

Distinguishing Between Site Waste, Natural, and Other Sources of Contamination at Uranium and Thorium Contaminated Sites - 12274  

SciTech Connect (OSTI)

Uranium and thorium processing and milling sites generate wastes (source, byproduct, or technically enhanced naturally occurring material), that contain contaminants that are similar to naturally occurring radioactive material deposits and other industry wastes. This can lead to mis-identification of other materials as Site wastes. A review of methods used by the US Army Corps of Engineers and the Environmental Protection Agency to distinguish Site wastes from potential other sources, enhanced materials, and natural deposits, at three different thorium mills was conducted. Real case examples demonstrate the importance of understanding the methods of distinguishing wastes. Distinguishing between Site wastes and enhanced Background material can be facilitated by establishing and applying a formal process. Significant project cost avoidance may be realized by distinguishing Site wastes from enhanced NORM. Collection of information on other potential sources of radioactive material and physical information related to the potential for other radioactive material sources should be gathered and reported in the Historical Site Assessment. At a minimum, locations of other such information should be recorded. Site decision makers should approach each Site area with the expectation that non site related radioactive material may be present and have a process in place to distinguish from Site and non Site related materials. (authors)

Hays, David C. [United States Army Corps of Engineers, Kansas City, Missouri, 64106 (United States)

2012-07-01T23:59:59.000Z

369

Charged spinning fluids with magnetic dipole moment in the Einstein-Cartan theory  

SciTech Connect (OSTI)

A classical perfect charged spinning fluid with magnetic dipole moment in the Einstein-Cartan theory is described by using an Eulerian Lagrangian formalism. The field equations and equations of motion so obtained generalize those proposed by Ray and Smalley. We also clarify some open questions which appear in the works of Ray and Smalley and of de Ritis et al.

Amorim, R.

1985-06-15T23:59:59.000Z

370

Stationary Axisymmetric Solutions and their Energy Contents in Teleparallel Equivalent of Einstein Theory  

E-Print Network [OSTI]

We apply the energy-momentum tensor which is coordinate independent to calculate the energy content of the axisymmetric solutions. Our results are compared with what have been obtained before within the framework of Einstein general relativity and M{\\o}ler's tetrad theory of gravitation.

G. G. L. Nashed

2015-03-03T23:59:59.000Z

371

K Bose-Einstein Condensate with Tunable Interactions M. Zaccanti,1  

E-Print Network [OSTI]

.50.ÿs Two-body interactions play a major role in the produc- tion and in the properties of Bose of the interactions to small values around zero can be performed in lithium, a possibility already exploited39 K Bose-Einstein Condensate with Tunable Interactions G. Roati,1 M. Zaccanti,1 C. D'Errico,1 J

Paris-Sud XI, Université de

372

Bose-Einstein condensation in atomic hydrogen T. J. Greytak 1  

E-Print Network [OSTI]

a remote chance of obtaining Bose-Einstein condensation. Using a quantum theory of corresponding states cooling of atoms allowed the alkali vapors to be pre-cooled to temperatures low enough that evaporative cooling could be used to take them into the sub-µK realm. Since 1995, many fruitful experiments have been

373

Update: April 2014 / International Office -B EXCHANGE YOUR PERSPECTIVE -STUDY AT EINSTEIN'S BIRTHPLACE!  

E-Print Network [OSTI]

Update: April 2014 / International Office - B EXCHANGE YOUR PERSPECTIVE - STUDY AT EINSTEIN: April 2014 / International Office ­ B Download Fact Sheet from http://www.uni-ulm.de/international INTERNATIONAL OFFICE CONTACT INFORMATION International Office Website http://www.uni-ulm.de/international Postal

Pfeifer, Holger

374

Synthesize Neutron-Drip-Line-Nuclides with Free-Neutron Bose-Einstein Condensates Experimentally  

E-Print Network [OSTI]

We first show a possible way to create a new type of matter, free-neutron Bose-Einstein condensate by the ultracold free-neutron-pair Bose-Einstein condensation and then determine the neutron drip line experimentally. The Bose-Einstein condensation of bosonic and fermionic atoms in atomic gases was performed experimentally and predicted theoretically early. Neutrons are similar to fermionic atoms. We found free neutrons could be cooled to ultracold neutrons with very low energy by other colder neutral atoms which are cooled by the laser. These neutrons form neutron pairs with spin zero, and then ultracold neutron-pairs form Bose-Einstein condensate. Our results demonstrate how these condensates can react with accelerated ion beams at different energy to synthesize very neutron-rich nuclides near, on or/and beyond the neutron drip line, to determine the neutron drip line and whether there are long-life nuclide or isomer islands beyond the neutron drip line experimentally. Otherwise, these experimental results will confirm our prediction that is in the whole interacting region or distance of nuclear force in all energy region from zero to infinite, Only repulsive nuclear force exists among identical nucleons and only among different nucleons exists attractive nuclear force.

Bao-Guo Dong

2014-09-22T23:59:59.000Z

375

Static Fundamental Solutions of Einstein Equations and Superposition Principle in Relativistic Gravityv  

E-Print Network [OSTI]

We show that Einstein equations are compatible with the presence of massive point particle idealization and find the corresponding two parameter family of solutions. They are complete defined by the bare mechanical mass $M>0$ and the Keplerian mass $m>0$ ($m < M$) of the point source of gravity. The global analytical properties of these solutions in the complex plane define a unique preferable radial variable of the one particle problem. These new solutions are fundamental solutions of the quasi-linear Einstein equations. We introduce and discuss a novel nonlinear superposition principle for solutions of Einstein equations and discover the basic role of the relativistic analog of the Newton gravitational potential. For the relativistic potential we introduce a simple quasi-linear superposition principle as a new physical requirement for the initial conditions for Einstein equations, thus justifying the instant gravistatic case for N particle system. This superposition principle allows us to sketch a new theory of the gravitational mass defect. In it a specific Mach-like principle for the Keplerian mass $m$ is valid, i.e. it depends on the mass distribution in the universe, in contrast to the bare mass $M$, which remains a true constant. Several basic examples both of discrete and of continuous mass distributions are considered.

P P Fiziev

2007-01-19T23:59:59.000Z

376

Black hole solutions of dimensionally reduced Einstein-Gauss-Bonnet gravity with a cosmological constant  

SciTech Connect (OSTI)

We study the phase space of the spherically symmetric solutions of the system obtained from the dimensional reduction of the six-dimensional Einstein-Gauss-Bonnet action with a cosmological constant. We show that all the physical solutions have anti-de Sitter asymptotic behavior.

Melis, M.; Mignemi, S. [Dipartimento di Matematica, Universita di Cagliari, viale Merello 92, 09123 Cagliari (Italy) and INFN, Sezione di Cagliari (Italy)

2007-01-15T23:59:59.000Z

377

The Einstein-Hamilton-Jacobi equation: Searching the classical solution for barotropic FRW  

E-Print Network [OSTI]

The dynamical evolution of the scale factor of FRW cosmological model is presented, when the equation of state of the material content assume the form $\\rm p=\\gamma \\rho$, $\\rm \\gamma=constant$, including the cosmological term. We use the WKB approximation and the relation with the Einstein-Hamilton-Jacobi equation to obtain the exact solutions.

S. R. Berbena; A. V. Berrocal; J. Socorro; Luis O. Pimentel

2006-07-27T23:59:59.000Z

378

Bogoliubov space of a Bose-Einstein condensate and quantum spacetime fluctuations  

SciTech Connect (OSTI)

We analyze the role that metric fluctuations could have on the features of a Bose-Einstein condensate. Particularly, the Bogoliubov space associated to it is considered and it will be shown that the pressure and the speed of sound of the ground state define an expression allowing us to determine the average size of these fluctuations.

Rivas, J. I.; Camacho, A.; Goeklue, E. [Departamento de Fisica, Universidad Autonoma Metropolitana-Iztapalapa Apartado Postal 55-534, C.P. 09340, Mexico, D.F. (Mexico)

2012-08-24T23:59:59.000Z

379

Comparison of Monte-Carlo and Einstein methods in the light-gas interactions  

E-Print Network [OSTI]

To study the propagation of light in nebulae, many astrophysicists use a Monte-Carlo computation which does not take interferences into account. Replacing the wrong method by Einstein coefficients theory gives, on an example, a theoretical spectrum much closer to the observed one.

Jacques Moret-Bailly

2010-01-18T23:59:59.000Z

380

Effect of Quantum Fluctuations on the Dipolar Motion of Bose-Einstein Condensates in Optical Lattices  

E-Print Network [OSTI]

Effect of Quantum Fluctuations on the Dipolar Motion of Bose-Einstein Condensates in Optical of condensate atoms in one-dimensional optical lattices and harmonic magnetic traps including quantum is reduced, on the contrary, strong quantum fluctuations lead to finite damping of condensate oscillations

Wang, Daw-Wei

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Phase diagram of two-species Bose-Einstein condensates in an optical lattice  

E-Print Network [OSTI]

The exact macroscopic wave functions of two-species Bose-Einstein condensates in an optical lattice beyond the tight-binding approximation are studied by solving the coupled nonlinear Schrodinger equations. The phase diagram for superfluid and insulator phases of the condensates is determined analytically according to the macroscopic wave functions of the condensates, which are seen to be traveling matter waves.

G. -P. Zheng; J. -Q. Liang; W. M. Liu

2005-06-04T23:59:59.000Z

382

Bragg spectroscopy for measuring Casimir-Polder interactions with Bose-Einstein condensates above corrugated surfaces  

E-Print Network [OSTI]

We propose a method to probe dispersive atom-surface interactions by measuring via two-photon Bragg spectroscopy the dynamic structure factor of a Bose-Einstein condensate above corrugated surfaces. This method takes advantage of the condensate coherence to reveal the spatial Fourier components of the lateral Casimir-Polder interaction energy.

Gustavo A. Moreno; Diego A. R. Dalvit; Esteban Calzetta

2010-03-11T23:59:59.000Z

383

atomic bose-einstein condensates: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

atomic bose-einstein condensates First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Realization of...

384

atomic-molecular bose-einstein condensates: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

atomic-molecular bose-einstein condensates First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Collective...

385

Experimental observation of the Bogoliubov transformation for a Bose-Einstein condensed gas  

E-Print Network [OSTI]

Phonons with wavevector $q/\\hbar$ were optically imprinted into a Bose-Einstein condensate. Their momentum distribution was analyzed using Bragg spectroscopy with a high momentum transfer. The wavefunction of the phonons was shown to be a superposition of +q and -q free particle momentum states, in agreement with the Bogoliubov quasiparticle picture.

J. M. Vogels; K. Xu; C. Raman; J. R. Abo-Shaeer; W. Ketterle

2001-12-06T23:59:59.000Z

386

Absence of Fragmentation in Two-Dimensional Bose-Einstein Condensation  

E-Print Network [OSTI]

); moreover, a mean-field analysis of a homogeneous three-dimensional Bose gas with repulsive interactions5Absence of Fragmentation in Two-Dimensional Bose-Einstein Condensation Juan Pablo Fern-dimensional finite trapped systems consist of fragmented condensates. We derive and diagonalize the one-body density

Mullin, William J.

387

ccsd00003161, Vortex patterns in a fast rotating Bose-Einstein condensate  

E-Print Network [OSTI]

. Furthermore we restrict our analysis to the case of a two-dimensional gas in the xy plane, assumingccsd­00003161, version 1 ­ 26 Oct 2004 Vortex patterns in a fast rotating Bose-Einstein condensate, France (Dated: October 26, 2004) For a fast rotating condensate in a harmonic trap, we investigate

388

arXiv:physics/0603142v117Mar2006 Brownian Motion after Einstein  

E-Print Network [OSTI]

arXiv:physics/0603142v117Mar2006 Brownian Motion after Einstein: Some new applications and new-4000 Roskilde, Denmark 2 Department of Biological Physics, E¨otv¨os Lor´and University (ELTE), H-1117 Budapest, Hungary 3 Max Planck Institute for the Physics of Complex Systems, N¨othnitzer Strasse 38, D

389

Path-Integral Monte Carlo And The Squeezed Trapped Bose-Einstein Gas  

E-Print Network [OSTI]

Path-Integral Monte Carlo And The Squeezed Trapped Bose-Einstein Gas Juan Pablo Fernández1 the gas becomes effectively two-dimensional (2D). We confirm the plausibility of this result by performing different estimates for the condensate fraction. For the ideal gas, we find that the PIMC column density

Mullin, William J.

390

Computer Science Distinguished Lectures 2010-11 http://www.cs.iastate.edu/~colloq/new/dls.shtml  

E-Print Network [OSTI]

Computer Science Distinguished Lectures 2010-11 http/pervasive computing. He received his B.A. degree in mathematics, and his Ph.D. degree in computer science from Courant of Computer Science at the University of Illinois at Chicago, and an Affiliate Professor in the Department

Mayfield, John

391

Bio for Esther Duflo Esther Duflo has distinguished herself through definitive contributions to the field of Development  

E-Print Network [OSTI]

, and education. She has written extensively on India, but has also studied Indonesia, Cote d'Ivoire, South Africa1 Bio for Esther Duflo Esther Duflo has distinguished herself through definitive contributions coauthors study the impact of female political leadership on local government spending and attitudes toward

Sarkar, Nilanjan

392

CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE This award recognises staff and alumni of the University whose contributions to  

E-Print Network [OSTI]

and alumni of the University whose contributions to the economic, cultural, scientific or social developmentCHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY This award recognises staff's achievements have contributed enormously to the ANU being recognized as a world-class centre for research

Botea, Adi

393

Tracking Non-point Fecal Pollution in the Guadalupe River: Distinguishing Urban and Rural Influences upon Water Quality  

E-Print Network [OSTI]

, Assistant Professor University of Houston - Victoria Non-point fecal pollution is a problem in water bodiesTracking Non-point Fecal Pollution in the Guadalupe River: Distinguishing Urban and Rural Influences upon Water Quality Matthew Boyett University of Houston - Victoria boyettmr@uhv.edu Dmitri Sobolev

394

SPRING 2013 c CLEMSON WORLD --1 Roots of the University Distinguished Service Awards Training TIGERS 6 Words or Less  

E-Print Network [OSTI]

. Classic. PatrickSquare.com Where Legacies Begin #12;SPRING 2013 c CLEMSON WORLD -- 5 President's ViewCW 4 William C. Smith Jr. Joseph D. Swann kim Allen Wilkerson ©2013 Clemson University Clemson WorldSPRING 2013 c CLEMSON WORLD -- 1 CLEMSON Roots of the University Distinguished Service Awards

Duchowski, Andrew T.

395

University of Maryland Institute for Advanced Computer Studies UMIACS' programs are led by distinguished faculty, many of whom hold joint  

E-Print Network [OSTI]

by distinguished faculty, many of whom hold joint appointments in Computer Science, Electrical and Computer, and over 400 workstations and PCs. · UMIACS' environment is enriched by a strong outreach program including, operating systems, and scientific computing Sponsored Research ANNUAL RESEARCH FUNDING $15 MILLION 3 #12

Gruner, Daniel S.

396

Matrix subdivision schemes Albert Cohen  

E-Print Network [OSTI]

in the analysis of multivariate scalar schemes, in subdivision processes corresponding to shift­invariant spaces extension of the well studied case of subdivision schemes with scalar masks. Such schemes arise of \\Phi. 1 #12; 1.Introduction Matrix subdivision schemes play an important role in the analysis of mul

Cohen, Albert

397

Albert Polman Center for Nanophotonics  

E-Print Network [OSTI]

(heat only) other renewables geothermal wind energy German Advisory Council on Global Change, 2003, www effect! #12;Available renewable energy sources #12;Black dots: area of solar panels needed to generate all of the worlds energy assuming 8% efficient photovoltaics Solar irradiance on earth Average solar

Polman, Albert

398

Representative Albert R. Public Policy  

E-Print Network [OSTI]

billion to the authorization for the Low-Income Home Energy Assistance Program. He also successfully years as a member of the U.S. House of Representatives, representing Maryland's 4th Congressional District. During the last 12 years, he served on the powerful House Energy and Commerce Committee, most

Sibille, Etienne

399

Albert Carnesale | Department of Energy  

Office of Environmental Management (EM)

Conventional Prompt Global Strike; and he was a member of the Obama Administration's Blue Ribbon Commission on America's Nuclear Future. He is a member of the National Academy...

400

Albert Carnesale | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orA BRIEF HISTORYAgency FinancialEnergy

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Observation of Bose-Einstein Condensation of Molecules Molecular condensates could lead to a host of new scientific explorations. These  

E-Print Network [OSTI]

of new scientific explorations. These include quantum gases with anisotropic dipolar interactions, tests-Einstein condensation of molecules was reported by three groups [1-3]. We observed BEC of lithium molecules. When a spin

402

What are the Hidden Quantum Processes In Einstein's Weak Principle of Equivalence?  

E-Print Network [OSTI]

We provide a quantum derivation of Einstein's Weak Equivalence Principle (WEP) of general relativity using a new quantum gravity theory proposed by the authors called Electro-Magnetic Quantum Gravity or EMQG (ref. 1). Newtonian Inertia is a property of matter due to the strictly local electrical force interactions contributed by each of the (electrically charged) elementary particles of the mass with the surrounding (electrically charged) virtual particles (virtual masseons) of the quantum vacuum. The sum of all the tiny electrical forces (photon exchanges with the vacuum particles) originating in each charged elementary particle of the accelerated mass is the source of the total inertial force of a mass which opposes accelerated motion in Newton's law 'F = MA'. We found that gravity also involves the same 'inertial' electromagnetic force component that exists in inertial mass. We propose that Einstein's general relativistic Weak Equivalence Principle (WEP) originates from common 'lower level' quantum vacuum ...

Ostoma, T; Ostoma, Tom; Trushyk, Mike

2000-01-01T23:59:59.000Z

403

Detecting and imaging single Rydberg electrons in a Bose-Einstein condensate  

E-Print Network [OSTI]

The quantum mechanical states of electrons in atoms and molecules are discrete spatial orbitals, which are fundamental for our understanding of atoms, molecules, and solids. They determine a wide range of basic atomic properties, ranging from the coupling to external fields to the whole field of chemistry. Nevertheless, the manifestation of electron orbitals in experiments so far has been rather indirect. In a detailed theoretical model, we analyze the impact of a single Rydberg electron onto a Bose-Einstein condensate and compare the results to experimental data. Based on this validated model we propose a method to optically image the shape of single electron orbitals using electron-phonon coupling in a Bose-Einstein condensate. This scheme requires only established and readily available experimental techniques and allows to directly capture textbook-like spatial images of single electronic orbitals in a single shot experiment.

Tomasz Karpiuk; Miros?aw Brewczyk; Kazimierz Rz??ewski; Jonathan B. Balewski; Alexander T. Krupp; Anita Gaj; Robert Löw; Sebastian Hofferberth; Tilman Pfau

2014-02-27T23:59:59.000Z

404

Critical Collapse in Einstein-Gauss-Bonnet Gravity in Five and Six Dimensions  

E-Print Network [OSTI]

Einstein-Gauss-Bonnet gravity (EGB) provides a natural higher dimensional and higher order curvature generalization of Einstein gravity. It contains a new, presumably microscopic, length scale that should affect short distance properties of the dynamics, such as Choptuik scaling. We present the results of a numerical analysis in generalized flat slice co-ordinates of self-gravitating massless scalar spherical collapse in five and six dimensional EGB gravity near the threshold of black hole formation. Remarkably, the behaviour is universal (i.e. independent of initial data) but qualitatively different in five and six dimensions. In five dimensions there is a minimum horizon radius, suggestive of a first order transition between black hole and dispersive initial data. In six dimensions no radius gap is evident. Instead, below the GB scale there is a change in the critical exponent and echoing period.

Deppe, N; Taves, T; Kunstatter, G; Mann, R B

2012-01-01T23:59:59.000Z

405

Recent results on Bose-Einstein correlations by the PHENIX Experiment  

E-Print Network [OSTI]

Bose-Einstein momentum correlation functions of identical bosons reveal the shape and size of the (soft) particle emitting source of the given particle. The widths of these correlation functions are called HBT radii, named after Brown and Twiss who studied the angular diameter of stars via intensity correlations in their radio telescopes. Today, high energy physics experiments measure the HBT radii as a function of many parameters: particle type, transverse momentum, azimuthal angle, collision energy, collision geometry. In this paper we present results from the RHIC PHENIX experiment. These include the observation of strong azimuthal-angle dependence of the extracted Gaussian HBT radii, the similarities and differences between kaon and pion HBT radii. The key point of this paper is the application of Bose-Einstein correlations to the search for the critical point: how HBT radii would show the appearance of a first order phase transition, and what the non-monotonic collision energy dependence of the pion sour...

Csanad, Mate

2015-01-01T23:59:59.000Z

406

Colloquium: The Einstein-Podolsky-Rosen paradox: From concepts to applications  

SciTech Connect (OSTI)

This Colloquium examines the field of the Einstein, Podolsky, and Rosen (EPR) gedanken experiment, from the original paper of Einstein, Podolsky, and Rosen, through to modern theoretical proposals of how to realize both the continuous-variable and discrete versions of the EPR paradox. The relationship with entanglement and Bell's theorem are analyzed, and the progress to date towards experimental confirmation of the EPR paradox is summarized, with a detailed treatment of the continuous-variable paradox in laser-based experiments. Practical techniques covered include continuous-wave parametric amplifier and optical fiber quantum soliton experiments. Current proposals for extending EPR experiments to massive-particle systems are discussed, including spin squeezing, atomic position entanglement, and quadrature entanglement in ultracold atoms. Finally, applications of this technology to quantum key distribution, quantum teleportation, and entanglement swapping are examined.

Reid, M. D.; Drummond, P. D.; Bowen, W. P.; Cavalcanti, E. G.; Lam, P. K.; Bachor, H. A.; Andersen, U. L.; Leuchs, G. [ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, P.O. Box 218, Melbourne, Victoria 3122 Australia (Australia); School of Physical Sciences, University of Queensland, Brisbane, Queensland 4072 (Australia); Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111 (Australia); ARC Centre of Excellence for Quantum-Atom Optics, Building 38, The Australian National University, Canberra, Australian Capital Territory 0200 (Australia); Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby (Denmark); Max-Planck Institute for the Science of Light and Department of Physics, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany)

2009-10-15T23:59:59.000Z

407

Bose-Einstein Condensation of Gases in the Frame of Quantum Electrodynamics: Interconnection of Constituents  

E-Print Network [OSTI]

Bose-Einstein condensate of rarified atomic gases is considered as the state formed by exchange of virtual photons, resonant to the lowest levels of atoms; such representation corresponds to the Einstein opinion about an inter-influence of condensable particles. Considered interactions directly lead to the QED structure of nonlinear potential in the Gross-Pitaevskii equation. Linear momenta that correspond to the thermal energy of condensable atoms are connected to near field of particles and therefore leave atoms immovable. The estimations of these effects do not contradict the observed data; the general quantum principles predict possibility of stimulating of BEC formation by resonant irradiation. All this requires the spectroscopic investigation of BEC on different steps of formation.

Mark E. Perel'man

2008-04-11T23:59:59.000Z

408

Rotating Bose-Einstein condensates: Closing the gap between exact and mean-field solutions  

E-Print Network [OSTI]

When a Bose-Einstein condensed cloud of atoms is given some angular momentum, it forms vortices arranged in structures with a discrete rotational symmetry. For these vortex states, the Hilbert space of the exact solution separates into a "primary" space related to the mean-field Gross-Pitaevskii solution and a "complementary" space including the corrections beyond mean-field. Considering a weakly-interacting Bose-Einstein condensate of harmonically-trapped atoms, we demonstrate how this separation can be used to close the conceptual gap between exact solutions for systems with only a few atoms and the thermodynamic limit for which the mean-field is the correct leading-order approximation. Although we illustrate this approach for the case of weak interactions, it is expected to be more generally valid.

Cremon, J C; Karabulut, E \\" O; Kavoulakis, G M; Mottelson, B R; Reimann, S M

2015-01-01T23:59:59.000Z

409

Uniqueness of the static Einstein-Maxwell spacetimes with a photon sphere  

E-Print Network [OSTI]

We consider the problem of uniqueness of static and asymptotically flat Einstein-Maxwell spacetimes with a photon sphere $P^3$. We are using a naturally modified definition of a photon sphere for electrically charged spacetimes with the additional property that the one-form $\\iota_{\\xi}F$ is normal to the photon sphere. For simplicity we are restricting ourselves to the case of zero magnetic charge and assume that the lapse function regularly foliates the spacetime outside the photon sphere. With this information we prove that $P^3$ has constant mean curvature and constant scalar curvature. We also derive a few equations which we later use to prove the main uniqueness theorem, i. e. the static asymptotically flat Einstein-Maxwell spacetimes with a non-extremal photon sphere are isometric to the Reissner-Nordstr\\"om one with mass $M$ and electric charge $Q$ subject to $\\frac{Q^2}{M^2}\\le \\frac{9}{8}$.

Yazadjiev, Stoytcho

2015-01-01T23:59:59.000Z

410

Generation of directional, coherent matter beams through dynamical instabilities in Bose-Einstein condensates  

SciTech Connect (OSTI)

We present a theoretical analysis of a coupled, two-state Bose-Einstein condensate with nonequal scattering lengths and show that dynamical instabilities can be excited. We demonstrate that these instabilities are exponentially amplified, resulting in highly directional, oppositely propagating, coherent matter beams at specific momenta. To accomplish this we prove that the mean field of our system is periodic and extend the standard Bogoliubov approach to consider a time-dependent, but cyclic, background. This allows us to use Floquet's theorem to gain analytic insight into such systems, rather than employing the usual Bogoliubov-de Gennes approach, which is usually limited to numerical solutions. We apply our theory to the metastable helium atom laser experiment by Dall et al. [Phys. Rev. A 79, 011601(R) (2009)] and show that it explains the anomalous beam profiles they observed. Finally, we demonstrate that the paired particle beams will be Einstein-Podolsky-Rosen entangled on formation.

Dennis, Graham R.; Johnsson, Mattias T. [Department of Quantum Science, Australian National University, Canberra 0200, Australia and Australian Research Council Centre of Excellence for Quantum-Atom Optics, Australian National University, Canberra 0200 (Australia)

2010-09-15T23:59:59.000Z

411

Excitations of One-Dimensional Bose-Einstein Condensates in a Random Potential  

SciTech Connect (OSTI)

We examine bosons hopping on a one-dimensional lattice in the presence of a random potential at zero temperature. Bogoliubov excitations of the Bose-Einstein condensate formed under such conditions are localized, with the localization length diverging at low frequency as l({omega}){approx}1/{omega}{sup {alpha}}. We show that the well-known result {alpha}=2 applies only for sufficiently weak random potential. As the random potential is increased beyond a certain strength, {alpha} starts decreasing. At a critical strength of the potential, when the system of bosons is at the transition from a superfluid to an insulator, {alpha}=1. This result is relevant for understanding the behavior of the atomic Bose-Einstein condensates in the presence of random potential, and of the disordered Josephson junction arrays.

Gurarie, V. [Department of Physics, University of Colorado, Boulder Colorado 80309 (United States); Refael, G. [Department of Physics, California Institute of Technology, Pasadena California 91125 (United States); Chalker, J. T. [Rudolf Peiers Centre for Theoretical Physics, Oxford University, 1 Keble Road, Oxford OX1 3NP (United Kingdom)

2008-10-24T23:59:59.000Z

412

On Bose-Einstein condensation on closed Robertson-Walker spacetimes  

E-Print Network [OSTI]

In this letter we summarize our analysis of Bose-Einstein condensation on closed Robertson-Walker spacetimes. In a previous work we defined an adiabatic KMS state on the Weyl-algebra of the free massive Klein-Gordon field. This state describes a free Bose gas on Robertson-Walker spacetimes. We use this state to analyze the possibility of Bose-Einstein condensation on closed Robertson-Walker spacetimes. We take into account the effects due to the finiteness of the spatial volume and show that they are not relevant in the early universe. Furthermore we show that a critical radius can be defined. The condensate disappears above the critical radius.

M. Trucks

1998-11-12T23:59:59.000Z

413

General models of Einstein gravity with a non-Newtonian weak-field limit  

E-Print Network [OSTI]

We investigate Einstein theories of gravity, coupled to a scalar field \\vphi and point-like matter, which are characterized by a scalar field-dependent matter coupling function e^{H(\\vphi)}. We show that under mild constraints on the form of the potential for the scalar field, there are a broad class of Einstein-like gravity models -characterized by the asymptotic behavior of H- which allow for a non-Newtonian weak-field limit with the gravitational potential behaving for large distances as ln r. The Newtonian term GM/r appears only as sub-leading. We point out that this behavior is also shared by gravity models described by f(R) Lagrangians. The relevance of our results for the building of infrared modified theories of gravity and for modified Newtonian dynamics is also discussed.

M. Cadoni; M. Casula

2009-01-08T23:59:59.000Z

414

Bose-Einstein Condensation in an electro-pneumatically transformed quadrupole-Ioffe magnetic trap  

E-Print Network [OSTI]

We report a novel approach for preparing a Bose-Einstein condensate (BEC) of $^{87}$Rb atoms using electro-pneumatically driven transfer of atoms into a Quadrupole-Ioffe magnetic trap (QUIC Trap). More than 5$\\times$$10^{8}$ atoms from a Magneto-optical trap are loaded into a spherical quadrupole trap and then these atoms are transferred into an Ioffe trap by moving the Ioffe coil towards the center of the quadrupole coil, thereby, changing the distance between quadrupole trap center and the Ioffe coil. The transfer efficiency is more than 80 \\%. This approach is different from a conventional approach of loading the atoms into a QUIC trap wherein the spherical quadrupole trap is transformed into a QUIC trap by changing the currents in the quadrupole and the Ioffe coils. The phase space density is then increased by forced rf evaporative cooling to achieve the Bose-Einstein condensation having more than $10^{5}$ atoms.

Sunil Kumar; Sumit Sarkar; Gunjan Verma; Chetan Vishwakarma; Md. Noaman; Umakant Rapol

2014-08-20T23:59:59.000Z

415

Event-based computer simulation model of Aspect-type experiments strictly satisfying Einstein's locality conditions  

E-Print Network [OSTI]

Inspired by Einstein-Podolsky-Rosen-Bohm experiments with photons, we construct an event-based simulation model in which every essential element in the ideal experiment has a counterpart. The model satisfies Einstein's criteria of local causality and does not rely on concepts of quantum and probability theory. We consider experiments in which the averages correspond to those of a singlet and product state of a system of two $S=1/2$ particles. The data is analyzed according to the experimental procedure, employing a time window to identify pairs. We study how the time window and the passage time of the photons, which depends on the relative angle between their polarization and the polarizer's direction, influences the correlations, demonstrating that the properties of the optical elements in the observation stations affect the correlations although the stations are separated spatially and temporarily. We show that the model can reproduce results which are considered to be intrinsically quantum mechanical.

De Raedt, Hans; Michielsen, Kristel; Keimpema, Koenraad; Miyashita, Seiji

2007-01-01T23:59:59.000Z

416

Event-based computer simulation model of Aspect-type experiments strictly satisfying Einstein's locality conditions  

E-Print Network [OSTI]

Inspired by Einstein-Podolsky-Rosen-Bohm experiments with photons, we construct an event-based simulation model in which every essential element in the ideal experiment has a counterpart. The model satisfies Einstein's criteria of local causality and does not rely on concepts of quantum and probability theory. We consider experiments in which the averages correspond to those of a singlet and product state of a system of two $S=1/2$ particles. The data is analyzed according to the experimental procedure, employing a time window to identify pairs. We study how the time window and the passage time of the photons, which depends on the relative angle between their polarization and the polarizer's direction, influences the correlations, demonstrating that the properties of the optical elements in the observation stations affect the correlations although the stations are separated spatially and temporarily. We show that the model can reproduce results which are considered to be intrinsically quantum mechanical.

Hans De Raedt; Koen De Raedt; Kristel Michielsen; Koenraad Keimpema; Seiji Miyashita

2007-12-16T23:59:59.000Z

417

Homogeneous Einstein Metrics on SU(n) Manifolds, Hoop Conjecture for Black Rings, and Ergoregions in Magnetised Black Hole Spacetimes  

E-Print Network [OSTI]

HOMOGENEOUS EINSTEIN METRICS ON SU(n) MANIFOLDS, HOOP CONJECTURE FOR BLACK RINGS, AND ERGOREGIONS IN MAGNETISED BLACK HOLE SPACETIMES A Dissertation by ABID HASAN MUJTABA Submitted to the O ce of Graduate Studies of Texas A&M University... Subject: Physics Copyright 2013 Abid Hasan Mujtaba ABSTRACT This Dissertation covers three aspects of General Relativity: inequivalent Einstein metrics on Lie Group Manifolds, proving the Hoop Conjecture for Black Rings, and investigating ergoregions...

Mujtaba, Abid Hasan

2013-01-09T23:59:59.000Z

418

Many-body quantum ratchet in a Bose-Einstein condensate  

E-Print Network [OSTI]

We study the dynamics of a dilute Bose-Einstein condensate confined in a toroidal trap and exposed to a pair of periodically flashed optical lattices. We first prove that in the noninteracting case this system can present a quantum symmetry which forbids the ratchet effect classically expected. We then show how many-body atom-atom interactions, treated within the mean-field approximation, can break this quantum symmetry, thus generating directed transport.

Dario Poletti; Giuliano Benenti; Giulio Casati; Baowen Li

2006-09-21T23:59:59.000Z

419

A positive energy theorem for Einstein-aether and Ho?ava gravity  

E-Print Network [OSTI]

Energy positivity is established for a class of solutions to Einstein-aether theory and the IR limit of Ho\\v{r}ava gravity within a certain range of coupling parameters. The class consists of solutions where the aether 4-vector is divergence free on a spacelike surface to which it is orthogonal (which implies that the surface is maximal). In particular, this result holds for spherically symmetric solutions at a moment of time symmetry.

David Garfinkle; Ted Jacobson

2011-08-09T23:59:59.000Z

420

Instability of Bose-Einstein condensation on quantum graphs under repulsive perturbations  

E-Print Network [OSTI]

In this Note we investigate Bose-Einstein condensation in interacting quantum many-particle systems on graphs. We extend previous results obtained for particles on an interval and show that even arbitrarily small repulsive two-particle interactions destroy a condensate in the non-interacting Bose gas. Our results also cover singular two-particle interactions, such as the well-known Lieb-Lininger model, in the thermodynamic limit.

Jens Bolte; Joachim Kerner

2014-11-26T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Static Cosmological Solutions of the Einstein-Yang-Mills-Higgs Equations  

E-Print Network [OSTI]

Numerical evidence is presented for the existence of a new family of static, globally regular `cosmological' solutions of the spherically symmetric Einstein-Yang-Mills-Higgs equations. These solutions are characterized by two natural numbers ($m\\geq 1$, $n\\geq 0$), the number of nodes of the Yang-Mills and Higgs field respectively. The corresponding spacetimes are static with spatially compact sections with 3-sphere topology.

P. Breitenlohner; P. Forgács; D. Maison

2000-06-13T23:59:59.000Z

422

Is there a $C$-function in 4D Quantum Einstein Gravity?  

E-Print Network [OSTI]

We describe a functional renormalization group-based method to search for `$C$-like' functions with properties similar to that in 2D conformal field theory. It exploits the mode counting properties of the effective average action and is particularly suited for theories including quantized gravity. The viability of the approach is demonstrated explicitly in a truncation of 4 dimensional Quantum Einstein Gravity, i.e. asymptotically safe metric gravity.

Becker, Daniel

2015-01-01T23:59:59.000Z

423

Quantum mechanics of the free Dirac electrons and Einstein photons, and the Cauchy process  

E-Print Network [OSTI]

Fundamental solutions for the free Dirac electron and Einstein photon equations in position coordinates are constructed as matrix valued functionals on the space of bump functions. It is shown that these fundamental solutions are related by a unitary transform via the Cauchy distribution in imaginary time. We study the way the classical relativistic mechanics of the free particle comes from the quantum mechanics of the free Dirac electron.

A. A. Beilinson

2014-12-03T23:59:59.000Z

424

Detecting Eve in communication with continuous-variable Einstein-Podolsky-Rosen correlations  

SciTech Connect (OSTI)

We study the validity of the entanglement parameter introduced in a recent publication by Guangqiang et al. [Phys. Rev. A 73, 012314 (2006)] for detecting Eve, the eavesdropper. We have found that Eve can be detected using this parameter only if Alice establishes a quantum correlation between the Einstein-Podolsky-Rosen (EPR) pair. This quantum correlation is related to the possibility of an apparent violation of the Heisenberg inequality for the quadrature components of the EPR pair.

Messikh, A. [Department of ICT, UIA, Jalan Gombak, 53100 Kuala Lumpur (Malaysia)

2007-03-15T23:59:59.000Z

425

Scattering Equations and Matrices: From Einstein To Yang-Mills, DBI and NLSM  

E-Print Network [OSTI]

The tree-level S-matrix of Einstein's theory is known to have a representation as an integral over the moduli space of punctured spheres localized to the solutions of the scattering equations. In this paper we introduce three operations that can be applied on the integrand in order to produce other theories. Starting in $d+M$ dimensions we use dimensional reduction to construct Einstein-Maxwell with gauge group $U(1)^M$. The second operation turns gravitons into gluons and we call it "squeezing". This gives rise to a formula for all multi-trace mixed amplitudes in Einstein-Yang-Mills. Dimensionally reducing Yang-Mills we find the S-matrix of a special Yang-Mills-Scalar (YMS) theory, and by the squeezing operation we find that of a YMS theory with an additional cubic scalar vertex. A corollary of the YMS formula gives one for a single massless scalar with a $\\phi^4$ interaction. Starting again from Einstein's theory but in $d+d$ dimensions we introduce a "generalized dimensional reduction" that produces the Born-Infeld theory or a special Galileon theory in $d$ dimensions depending on how it is applied. An extension of Born-Infeld formula leads to one for the Dirac-Born-Infeld (DBI) theory. By applying the same operation to Yang-Mills we obtain the $U(N)$ non-linear sigma model (NLSM). Finally, we show how the Kawai-Lewellen-Tye relations naturally follow from our formulation and provide additional connections among these theories. One such relation constructs DBI from YMS and NLSM.

Freddy Cachazo; Song He; Ellis Ye Yuan

2015-01-25T23:59:59.000Z

426

Phase diagrams of F2 spinor Bose-Einstein condensates C. V. Ciobanu,1  

E-Print Network [OSTI]

Phase diagrams of FÃ?2 spinor Bose-Einstein condensates C. V. Ciobanu,1 S.-K. Yip,2,1 and Tin-Lun Ho; published 11 February 2000 We show that there are three possible phases for a spin-2 spinor Bose condensate the structure of a spin-2 spinor Bose condensate and that of a d-wave BCS superfluid. PACS number s : 03.75.Fi

Ciobanu, Cristian

427

Enhanced oscillation lifetime of a Bose-Einstein condensate in the 3D/1D crossover  

E-Print Network [OSTI]

We have measured the damped motion of a trapped Bose-Einstein condensate, oscillating with respect to a thermal cloud. The cigar-shaped trapping potential provides enough transverse confinement that the dynamics of the system are intermediate between three-dimensional and one-dimensional. We find that oscillations persist for longer than expected for a three-dimensional gas. We attribute this to the suppressed occupation of transverse momentum states, which are essential for damping.

Yuen, B; Cotter, J P; Butler, E; Hinds, E A

2015-01-01T23:59:59.000Z

428

Boundary Effects on Bose-Einstein Condensation in Ultra-Static Space-Times  

E-Print Network [OSTI]

The boundary effects on the Bose-Einstein condensation of an ideal Bose gas on an ultra-static space-time are studied by a Mellin-Barnes type asymptotic analysis of the harmonic sum representing the depletion coefficient. Small $\\beta m$ regime, which is the relevant regime for the relativistic gas, is studied through the heat kernel expansion for both Dirichlet and Neumann boundary conditions. The analysis is made for both charged bosons and neutral bosons.

L. Akant; E. Ertugrul; Y. Gul; O. T. Turgut

2014-07-08T23:59:59.000Z

429

Boundary Effects on Bose-Einstein Condensation in Ultra-Static Space-Times  

E-Print Network [OSTI]

The boundary effects on the Bose-Einstein condensation of an ideal Bose gas on an ultra-static space-time are studied by a Mellin-Barnes type asymptotic analysis of the harmonic sum representing the depletion coefficient. Small $\\beta m$ regime, which is the relevant regime for the relativistic gas, is studied through the heat kernel expansion for both Dirichlet and Neumann boundary conditions. The analysis is made for both charged bosons and neutral bosons.

Akant, L; Gul, Y; Turgut, O T

2015-01-01T23:59:59.000Z

430

The propagation of waves in Einstein's unified field theory as shown by two exact solutions  

E-Print Network [OSTI]

The propagation of waves in two space dimensions exhibited by two exact solutions to the field equations of Einstein's unified field theory is investigated under the assumption that the metric s_{ik} is the one already chosen by Kursunoglu and by H\\'ely in the years 1952-1954. It is shown that, for both exact solutions, with this choice of the metric the propagation of the waves occurs in the wave zone with the fundamental velocity (ds^2=0).

Salvatore Antoci

2009-09-29T23:59:59.000Z

431

Albert-Ludwigs-Universitt FreiburgAlbert-Ludwigs-Universitt Freiburg Albert-Ludwigs-Universitt Freiburg Fahnenbergplatz  

E-Print Network [OSTI]

as the unwanted showing or public exhibition of porno- graphic images," that has "the purpose or effect

Teschner, Matthias

432

On Einstein - Weyl unified model of dark energy and dark matter  

E-Print Network [OSTI]

Here I give a more detailed account of the part of the conference report that was devoted to reinterpreting the Einstein `unified models of gravity and electromagnetism' (1923) as the unified theory of dark energy (cosmological constant) and dark matter (neutral massive vector particle having only gravitational interactions). After summarizing Einstein's work and related earlier work of Weyl and Eddington, I present an approach to finding spherically symmetric solutions of the simplest variant of the Einstein models that was earlier mentioned in Weyl's work as an example of his generalization of general relativity. The spherically symmetric static solutions and homogeneous cosmological models are considered in some detail. As the theory is not integrable we study approximate solutions. In the static case, we show that there may exist two horizons and derive solutions near horizons. In cosmology, we propose to study the corresponding expansions of possible solutions near the origin and derive these expansions in a simplified model neglecting anisotropy. The structure of the solutions seems to hint at a possibility of an inflation mechanism that does not require adding scalar fields.

A. T. Filippov

2009-05-29T23:59:59.000Z

433

Holographic Superconductors with various condensates in Einstein-Gauss-Bonnet gravity  

E-Print Network [OSTI]

We study holographic superconductors in Einstein-Gauss-Bonnet gravity. We consider two particular backgrounds: a $d$-dimensional Gauss-Bonnet-AdS black hole and a Gauss-Bonnet-AdS soliton. We discuss in detail the effects that the mass of the scalar field, the Gauss-Bonnet coupling and the dimensionality of the AdS space have on the condensation formation and conductivity. We also study the ratio $\\omega_g/T_c $ for various masses of the scalar field and Gauss-Bonnet couplings.

Qiyuan Pan; Bin Wang; Eleftherios Papantonopoulos; Jeferson de Oliveira; A. B. Pavan

2010-04-09T23:59:59.000Z

434

Topological sectors for Weyl-algebra net in the Einstein cylindrical universe  

E-Print Network [OSTI]

This paper is an extended and more detailed version of arXiv:0812.0533. We tackle the problem of constructing explicit examples of topological cocycles of Roberts' net cohomology, as defined abstractly by Brunetti and Ruzzi. We consider the simple case of massive bosonic quantum field theory on the two dimensional Einstein cylinder. After deriving some crucial results of the algebraic framework of quantization, we address the problem of the construction of the topological cocycles. All constructed cocycles lead to unitarily equivalent representations of the fundamental group of the circle (seen as a diffeomorphic image of all possible Cauchy surfaces).

Lorenzo Franceschini

2009-05-28T23:59:59.000Z

435

Post-Newtonian parameters and constraints on Einstein-aether theory  

E-Print Network [OSTI]

We analyze the observational and theoretical constraints on ``Einstein-aether theory", a generally covariant theory of gravity coupled to a dynamical, unit, timelike vector field that breaks local Lorentz symmetry. The results of a computation of the remaining post-Newtonian parameters are reported. These are combined with other results to determine the joint post-Newtonian, vacuum-Cerenkov, nucleosynthesis, stability, and positive-energy constraints. All of these constraints are satisfied by parameters in a large two-dimensional region in the four-dimensional parameter space defining the theory.

Brendan Z. Foster; Ted Jacobson

2006-02-08T23:59:59.000Z

436

Numerical Solutions of the Einstein-Yang-Mills System with Cosmological Constant  

E-Print Network [OSTI]

Numerical evidence for a cosmological version of the Bartnik-McKinnon family of particle-like solutions of the Einstein-Yang-Mills system is presented. Our solutions are also static, but space has the topology of a three-sphere. By adjusting the cosmological constant we found numerically a spherically symmetric solution which can be regarded as an excitation of the unique SO(4)-invariant solution. We expect that for each node number there exists such a solution without a cosmological horizon.

P. Molnar

1995-05-04T23:59:59.000Z

437

On the non-relativistic limit of the spherically symmetric Einstein-Vlasov-Maxwell system  

E-Print Network [OSTI]

The Einstein-Vlasov-Maxwell (EVM) system can be viewed as a relativistic generalization of the Vlasov-Poisson (VP) system. As it is proved below, one of nice property obeys by the first system is that the strong energy condition holds and this allows to conclude that the above system is physically viable. We show in this paper that in the context of spherical symmetry, solutions of the perturbed (EVM) system by $\\gamma := 1/c^{2}$, $c$ being the speed of light, exist and converge uniformly in $L^{\\infty}$-norm, as $c$ goes to infinity on compact time intervals to solutions of the non-relativistic (VP) system.

P. Noundjeu

2005-08-19T23:59:59.000Z

438

Disruption of reflecting Bose-Einstein condensates due to interatomic interactions and quantum noise  

SciTech Connect (OSTI)

We perform fully three-dimensional simulations, using the truncated Wigner method, to investigate the reflection of Bose-Einstein condensates from abrupt potential barriers. We show that the interatomic interactions can disrupt the internal structure of a cigar-shaped cloud with a high atom density at low approach velocities, damping the center-of-mass motion and generating vortices. Furthermore, by incorporating quantum noise we show that scattering halos form at high approach velocities, causing an associated condensate depletion. We compare our results to recent experimental observations.

Scott, R. G.; Hutchinson, D. A. W.; Gardiner, C. W. [The Jack Dodd Centre for Photonics and Ultra-Cold Atoms, Department of Physics, University of Otago, P.O. Box 56, Dunedin (New Zealand)

2006-11-15T23:59:59.000Z

439

Holographic superconductors with various condensates in Einstein-Gauss-Bonnet gravity  

SciTech Connect (OSTI)

We study holographic superconductors in Einstein-Gauss-Bonnet gravity. We consider two particular backgrounds: a d-dimensional Gauss-Bonnet-AdS black hole and a Gauss-Bonnet-AdS soliton. We discuss in detail the effects that the mass of the scalar field, the Gauss-Bonnet coupling and the dimensionality of the AdS space have on the condensation formation and conductivity. We also study the ratio {omega}{sub g}/T{sub c} for various masses of the scalar field and Gauss-Bonnet couplings.

Pan Qiyuan [Department of Physics, Fudan University, 200433 Shanghai (China); Institute of Physics and Department of Physics, Hunan Normal University, 410081, Changsha (China); Wang Bin [Department of Physics, Fudan University, 200433 Shanghai (China); Papantonopoulos, Eleftherios; Oliveira, Jeferson de; Pavan, A. B. [Department of Physics, National Technical University of Athens, Zografou Campus GR 157 73, Athens (Greece); Instituto de Fisica, Universidade de Sao Paulo, C.P.66.318, CEP 05315-970, Sao Paulo (Brazil)

2010-05-15T23:59:59.000Z

440

Interpretation of intuitionistic solution of the vacuum Einstein equations in smooth topos  

E-Print Network [OSTI]

The topos theory is a theory which is used for deciding a number of problems of theory of relativity, gravitation and quantum physics. In the article spherically symmetric solution of the vacuum Einstein equations in the Intuitionistic theory of Gravitation at different stages of smooth topos ${\\bf Set}^{\\bf L_{op}}$ is considered. Infinitesimal "weak" gravitational field can be strong at some stagies, for which we have the additional dimensions. For example, the cosmological constant is not constant with respect to additional dimensions. Signature of space-time metric can depend of density of vacuum and cosmological constant.

A. K. Guts; A. A. Zvyagintsev

2000-01-24T23:59:59.000Z

Note: This page contains sample records for the topic "albert einstein distinguished" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Rotational fluxons of Bose-Einstein condensates in coplanar double-ring traps  

SciTech Connect (OSTI)

Rotational analogs to magnetic fluxons in conventional Josephson junctions are predicted to emerge in the ground state of rotating tunnel-coupled annular Bose-Einstein condensates (BECs). Such topological condensate-phase structures can be manipulated by external potentials. We determine conditions for observing macroscopic quantum tunneling of a fluxon. Rotational fluxons in double-ring BECs can be created, manipulated, and controlled by external potentials in different ways than is possible in the solid-state system, thus rendering them a promising candidate system for studying and utilizing quantum properties of collective many-particle degrees of freedom.

Brand, J. [Centre for Theoretical Chemistry and Physics, Massey University (Albany Campus), Private Bag 102 904, North Shore MSC, Auckland 0745 (New Zealand); Institute of Natural Sciences, Massey University (Albany Campus), Private Bag 102 904, North Shore MSC, Auckland 0745 (New Zealand); Haigh, T. J. [Institute of Fundamental Sciences, Massey University (Manawatu Campus), Private Bag 11 222, Palmerston North 4442 (New Zealand); Zuelicke, U. [Institute of Fundamental Sciences, Massey University (Manawatu Campus), Private Bag 11 222, Palmerston North 4442 (New Zealand); Centre for Theoretical Chemistry and Physics, Massey University (Albany Campus), Private Bag 102 904, North Shore MSC, Auckland 0745 (New Zealand)

2009-07-15T23:59:59.000Z

442

Analog quantum simulation of gravitational waves in a Bose-Einstein condensate  

E-Print Network [OSTI]

We show how to vary the physical properties of a Bose-Einstein condensate (BEC) in order to mimic an effective gravitational-wave spacetime. In particular, we focus in the simulation of the recently discovered creation of particles by real spacetime distortion in box-type traps. We show that, by modulating the speed of sound in the BEC, the phonons experience the effects of a simulated spacetime ripple with experimentally amenable parameters. These results will inform the experimental programme of gravitational wave astronomy with cold atoms.

Tupac Bravo; Carlos Sabín; Ivette Fuentes

2015-02-11T23:59:59.000Z

443

Realization of a Sonic Black Hole Analog in a Bose-Einstein Condensate  

SciTech Connect (OSTI)

We have created an analog of a black hole in a Bose-Einstein condensate. In this sonic black hole, sound waves, rather than light waves, cannot escape the event horizon. A steplike potential accelerates the flow of the condensate to velocities which cross and exceed the speed of sound by an order of magnitude. The Landau critical velocity is therefore surpassed. The point where the flow velocity equals the speed of sound is the sonic event horizon. The effective gravity is determined from the profiles of the velocity and speed of sound. A simulation finds negative energy excitations, by means of Bragg spectroscopy.

Lahav, Oren; Itah, Amir; Blumkin, Alex; Gordon, Carmit; Rinott, Shahar; Zayats, Alona; Steinhauer, Jeff [Technion-Israel Institute of Technology, Haifa (Israel)

2010-12-10T23:59:59.000Z

444

How do sound waves in a Bose-Einstein condensate move so fast?  

E-Print Network [OSTI]

Low-momentum excitations of a dilute Bose-Einstein condensate behave as phonons and move at a finite velocity v_s. Yet the atoms making up the phonon excitation each move very slowly; v_a = p/m --> 0. A simple "cartoon picture" is suggested to understand this phenomenon intuitively. It implies a relation v_s/v_a = N_ex, where N_ex is the number of excited atoms making up the phonon. This relation does indeed follow from the standard Bogoliubov theory.

P. M. Stevenson

2003-08-29T23:59:59.000Z

445

General Einstein-Podolsky-Rosen-type entanglement of continuous variables for bosons  

SciTech Connect (OSTI)

We show that general Einstein-Podolsky-Rosen-type (EPR-type) entanglement of continuous variables with arbitrary eigenvalues for bosons can be yielded. For bosons of nonzero resting mass EPR-type entangled state can be achieved by the use of atomic beam splitters in particles of a position eigenstate and n-1 momentum eigenstates. For light field in which resting mass of the photon is zero, approximate EPR-type entanglement can be experimentally generated when we apply optical beam splitters to one position-squeezed coherence state and n-1 momentum-squeezed coherence states, this approximate version tends to perfect EPR entanglement in the limit of infinite squeezing.

Jiang Nianquan; Zheng Yizhuang [Department of Physics, Wenzhou University, Wenzhou 325027 (China)

2006-07-15T23:59:59.000Z

446

Quantum-field dynamics of expanding and contracting Bose-Einstein condensates  

SciTech Connect (OSTI)

We analyze the dynamics of quantum statistics in a harmonically trapped Bose-Einstein condensate, whose two-body interaction strength is controlled via a Feshbach resonance. From an initially noninteracting coherent state, the quantum field undergoes Kerr squeezing, which can be qualitatively described with a single mode model. To render the effect experimentally accessible, we propose a homodyne scheme, based on two hyperfine components, which converts the quadrature squeezing into number squeezing. The scheme is numerically demonstrated using a two-component Hartree-Fock-Bogoliubov formalism.

Wuester, S.; Dabrowska-Wuester, B. J.; Scott, S. M.; Close, J. D.; Savage, C. M. [Department of Physics, Australian National University, Canberra ACT 0200 (Australia)

2008-02-15T23:59:59.000Z

447

Modulated amplitude waves with nonzero phases in Bose-Einstein condensates  

E-Print Network [OSTI]

In this paper we give a frame for application of the averaging method to Bose-Einstein condensates (BECs) and obtain an abstract result upon the dynamics of BECs. Using aver- aging method, we determine the location where the modulated amplitude waves (periodic or quasi-periodic) exist and we also study the stability and instability of modulated amplitude waves (periodic or quasi-periodic). Compared with the previous work, modulated amplitude waves studied in this paper have nontrivial phases and this makes the problem become more diffcult, since it involves some singularities.

Qihuai Liu; Dingbian Qian

2011-08-02T23:59:59.000Z

448

Creation of macroscopic superposition states from arrays of Bose-Einstein condensates  

E-Print Network [OSTI]

We consider how macroscopic quantum superpositions may be created from arrays of Bose-Einstein condensates. We study a system of three condensates in Fock states, all with the same number of atoms and show that this has the form of a highly entangled superposition of different quasi-momenta. We then show how, by partially releasing these condensates and detecting an interference pattern where they overlap, it is possible to create a macroscopic superposition of different relative phases for the remaining portions of the condensates. We discuss methods for confirming these superpositions.

J. A. Dunningham; K. Burnett; R. Roth; W. D. Phillips

2006-08-30T23:59:59.000Z

449

Bose-Einstein Condensation in the Relativistic Pion Gas: Thermodynamic Limit and Finite Size Effects  

E-Print Network [OSTI]

We consider the Bose-Einstein condensation (BEC) in a relativistic pion gas. The thermodynamic limit when the system volume $V$ goes to infinity as well as the role of finite size effects are studied. At $V\\to \\infty$ the scaled variance for particle number fluctuations, $\\omega=/$, converges to finite values in the normal phase above the BEC temperature, $T>T_C$. It diverges as $\\omega \\propto V^{1/3}$ at the BEC line $T=T_C$, and $\\omega \\propto V$ at $Tcondensate. Possible experimental signals of the pion BEC in finite systems created in high energy proton-proton collisions are discussed.

V. V. Begun; M. I. Gorenstein

2008-02-22T23:59:59.000Z

450

Nonequilibrium Bose systems and nonground-state Bose-Einstein condensates  

E-Print Network [OSTI]

The theory of resonant generation of nonground-state Bose-Einstein condensates is extended to Bose-condensed systems at finite temperature. The generalization is based on the notion of representative statistical ensembles for Bose systems with broken global gauge symmetry. Self-consistent equations are derived describing an arbitrary nonequilibrium nonuniform Bose system. The notion of finite-temperature topological coherent modes, coexisting with a cloud of noncondensed atoms, is introduced. It is shown that resonant generation of these modes is feasible for a gas of trapped Bose atoms at finite temperature.

V. I. Yukalov

2006-06-26T23:59:59.000Z

451

Dimension reduction for anisotropic Bose-Einstein condensates in the strong interaction regime  

E-Print Network [OSTI]

We study the problem of dimension reduction for the three dimensional Gross-Pitaevskii equation (GPE) describing a Bose-Einstein condensate confined in a strongly anisotropic harmonic trap. Since the gas is assumed to be in a strong interaction regime, we have to analyze two combined singular limits: a semi-classical limit in the transport direction and the strong partial confinement limit in the transversal direction. We prove that both limits commute together and we provide convergence rates. The by-products of this work are approximated models in reduced dimension for the GPE, with a priori estimates of the approximation errors.

Weizhu Bao; Loic Le Treust; Florian Mehats

2014-03-12T23:59:59.000Z

452

Creation and Detection of Skyrmions in a Bose-Einstein Condensate  

SciTech Connect (OSTI)

We present the first experimental realization and characterization of two-dimensional Skyrmions and half-Skyrmions in a spin-2 Bose-Einstein condensate. The continuous rotation of the local spin of the Skyrmion through an angle of pi (and half-Skyrmion through an angle of pi/2) across the cloud is confirmed by the spatial distribution of the three spin states as parametrized by the bending angle of the l vector. The winding number w=(0,1,2) of the internal spin states comprising the Skyrmions is confirmed through matter-wave interference.

Leslie, L. S.; Deutsch, B. M. [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States); Hansen, A.; Wright, K. C. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Bigelow, N. P. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Institute of Optics and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

2009-12-18T23:59:59.000Z

453

Dynamics of the spatially homogeneous Bianchi type I Einstein-Vlasov equations  

E-Print Network [OSTI]

We investigate the dynamics of spatially homogeneous solutions of the Einstein-Vlasov equations with Bianchi type I symmetry by using dynamical systems methods. All models are forever expanding and isotropize toward the future; toward the past there exists a singularity. We identify and describe all possible past asymptotic states; in particular, on the past attractor set we establish the existence of a heteroclinic network, which is a new type of feature in general relativity. This illustrates among other things that Vlasov matter can lead to quite different dynamics of cosmological models as compared to perfect fluids.

J. Mark Heinzle; Claes Uggla

2005-12-05T23:59:59.000Z

454

Microwave-stimulated Raman adiabatic passage in a Bose-Einstein condensate on an atom chip  

E-Print Network [OSTI]

We report the achievement of stimulated Raman adiabatic passage (STIRAP) in the microwave frequency range between internal states of a Bose-Einstein condensate (BEC) magnetically trapped in the vicinity of an atom chip. The STIRAP protocol used in this experiment is robust to external perturbations as it is an adiabatic transfer, and power-efficient as it involves only resonant (or quasi-resonant) processes. Taking into account the effect of losses and collisions in a non-linear Bloch equations model, we show that the maximum transfer efficiency is obtained for non-zero values of the one- and two-photon detunings, which is confirmed quantitatively by our experimental measurements.

Dupont-Nivet, Matthieu; Laudat, Théo; Westbrook, Christoph I; Schwartz, Sylvain

2015-01-01T23:59:59.000Z

455

Dynamics of a Bose-Einstein condensate in a horizontally vibrating shallow optical lattice  

SciTech Connect (OSTI)

We consider a solitonic solution of the self-attractive Bose-Einstein condensate in a one-dimensional external potential of a shallow optical lattice with large periodicity when the lattice is horizontally shaken. We investigate the dynamics of the bright soliton through the properties of the fixed points. The special type of bifurcation results in a simple criterion for the stability of the fixed points depending only on the amplitude of the shaking lattice. Because of the similarity of the equations with those of an ac-driven Josephson junction, some results may find applications in other branches of physics.

Valizadeh, A.; Jahanbani, Kh.; Kolahchi, M. R. [Institute for Advanced Studies in Basic Sciences, P.O. Box 45195-1159, Zanjan (Iran, Islamic Republic of)

2010-02-15T23:59:59.000Z

456

Einstein's Dream of Unified Forces | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 IndustrialIsadore Perlman,Bios High EnergyEliane S LessnerDrTimEarth Since Einstein,

457

Distinguishing spin pumping from spin rectification in a Pt/Py bilayer through angle dependent line shape analysis  

SciTech Connect (OSTI)

A pure spin current driven by spin pumping is converted to a DC voltage and detected electrically in a Py/Pt bilayer sample. This DC voltage mixes with a DC voltage produced through spin rectification. The ferromagnetic resonance line shape strongly depends on the microwave magnetic h field distribution. We have systematically studied the line shapes by changing the external magnetic field orientation in plane of a Pt/Py bilayer. A method is demonstrated which allows us to calculate the microwave h field vector distribution, and distinguish spin pumping from spin rectification.

Bai, Lihui; Hyde, P.; Hu, C.-M. [Department of Physics and Astronomy, University of Manitoba, Winnipeg R3T 2N2 (Canada)] [Department of Physics and Astronomy, University of Manitoba, Winnipeg R3T 2N2 (Canada); Feng, Z.; Ding, H. F. [National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 22 Hankou Road, Nanjing 210093 (China)] [National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 22 Hankou Road, Nanjing 210093 (China)

2013-06-17T23:59:59.000Z

458

Dynamical System Analysis of Modified Chaplygin Gas in Einstein-Aether Gravity  

E-Print Network [OSTI]

In this work we investigate the background dynamics when dark energy is coupled to dark matter with a suitable interaction in the universe described by Einstein-Aether gravity. Dark energy in the form of Modified Chaplygin gas is considered. A suitable interaction between dark energy and dark matter is considered in order to at least alleviate (if not solve) the cosmic coincidence problem. The dynamical system of equations is solved numerically and a stable scaling solution is obtained. A significant attempt towards the solution of the cosmic coincidence problem is taken. The statefinder parameters are also calculated to classify the dark energy models. Graphs and phase diagrams are drawn to study the variations of these parameters. It is also seen that the background dynamics of modified Chaplygin gas in Einstein-Aether gravity is completely consistent with the notion of an accelerated expansion in the late universe. Finally, it has been shown that the universe follows the power law form of expansion around the critical point.

Chayan Ranjit; Prabir Rudra; Sujata Kundu

2014-08-19T23:59:59.000Z

459

Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data  

E-Print Network [OSTI]

This paper presents results of an all-sky searches for periodic gravitational waves in the frequency range [50, 1190] Hz and with frequency derivative ranges of [-2 x 10^-9, 1.1 x 10^-10] Hz/s for the fifth LIGO science run (S5). The novelty of the search lies in the use of a non-coherent technique based on the Hough-transform to combine the information from coherent searches on timescales of about one day. Because these searches are very computationally intensive, they have been deployed on the Einstein@Home distributed computing project infrastructure. The search presented here is about a factor 3 more sensitive than the previous Einstein@Home search in early S5 LIGO data. The post-processing has left us with eight surviving candidates. We show that deeper follow-up studies rule each of them out. Hence, since no statistically significant gravitational wave signals have been detected, we report upper limits on the intrinsic gravitational wave amplitude h0. For example, in the 0.5 Hz-wide band at 152.5 Hz, we can exclude the presence of signals with h0 greater than 7.6 x 10^-25 with a 90% confidence level.

J. Aasi; J. Abadie; B. P. Abbott; R. Abbott; T. D. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; T. Adams; P. Addesso; R. Adhikari; C. Affeldt; M. Agathos; K. Agatsuma; P. Ajith; B. Allen; A. Allocca; E. Amador Ceron; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; S. Ast; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. Baker; G. Ballardin; S. Ballmer; Y. Bao; J. C. B. Barayoga; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; A. Basti; J. Batch; J. Bauchrowitz; Th. S. Bauer; M. Bebronne; D. Beck; B. Behnke; M. Bejger; M. G. Beker; A. S. Bell; C. Bell; I. Belopolski; M. Benacquista; J. M. Berliner; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; T. Bhadbade; I. A. Bilenko; G. Billingsley; J. Birch; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; O. Bock; T. P. Bodiya; C. Bogan; C. Bond; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; J. Breyer; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet--Castell; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; G. Cagnoli; E. Calloni; J. B. Camp; P. Campsie; K. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; S. Caudill; M. Cavaglià; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; T. Chalermsongsak; P. Charlton; E. Chassande-Mottin; W. Chen; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; S. Chung; G. Ciani; F. Clara; D. E. Clark; J. A. Clark; J. H. Clayton; F. Cleva; E. Coccia; P. -F. Cohadon; C. N. Colacino; A. Colla; M. Colombini; A. Conte; R. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corsi; C. A. Costa; M. Coughlin; J. -P. Coulon; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; A. Cumming; L. Cunningham; E. Cuoco; R. M. Cutler; K. Dahl; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; B. Daudert; H. Daveloza; M. Davier; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; W. Del Pozzo; T. Dent; V. Dergachev; R. DeRosa; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Díaz; A. Dietz; A. Dietz; F. Donovan; K. L. Dooley; S. Doravari; S. Dorsher; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; J. -C. Dumas; S. Dwyer; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Endröczi; R. Engel; T. Etzel; K. Evans; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; B. F. Farr; M. Favata; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. P. Fisher; R. Flaminio; S. Foley; E. Forsi; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Franco; S. Frasca; F. Frasconi; M. Frede; M. A. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; M. -K. Fujimoto; P. J. Fulda; M. Fyffe; J. Gair; M. Galimberti; L. Gammaitoni; J. Garcia; F. Garufi; M. E. Gáspár; G. Gelencser; G. Gemme; E. Genin; A. Gennai; L. Á. Gergely; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; S. Gil-Casanova; C. Gill; J. Gleason; E. Goetz; G. González; M. L. Gorodetsky; S. Goßler; R. Gouaty; C. Graef; P. B. Graff; M. Granata; A. Grant; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Griffo; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; R. Gupta; E. K. Gustafson; R. Gustafson; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. T. Hartman; K. Haughian; K. Hayama; J. -F. Hayau; J. Heefner; A. Heidmann; H. Heitmann; P. Hello; M. A. Hendry; I. S. Heng; A. W. Heptonstall; V. Herrera; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; K. Holt; M. Holtrop; T. Hong; S. Hooper; J. Hough; E. J. Howell; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; K. Izumi; M. Jacobson; E. James; Y. J. Jang; P. Jaranowski; E. Jesse; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; R. Kasturi; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kaufman; K. Kawabe; S. Kawamura; F. Kawazoe; D. Keitel; D. Kelley; W. Kells; D. G. Keppel; Z. Keresztes; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; B. K. Kim; C. Kim; H. Kim; K. Kim; N. Kim; Y. M. Kim; P. J. King; D. L. Kinzel; J. S. Kissel; S. Klimenko; J. Kline; K. Kokeyama; V. Kondrashov; S. Koranda; W. Z. Korth; I. Kowalska

2012-08-04T23:59:59.000Z

460

The Einstein@Home search for radio pulsars and PSR J2007+2722  

E-Print Network [OSTI]

Einstein@Home aggregates the computer power of hundreds of thousands of volunteers from 192 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using PALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 min. We also describe the first Einstein@Home discovery, the 40.8 Hz isolated pulsar PSR J2007+2722, and provide a full timing model. PSR J2007+2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but can not prove that PSR J2007+27...

Allen, B; Cordes, J M; Deneva, J S; Hessels, J W T; Anderson, D; Aulbert, C; Bock, O; Brazier, A; Chatterjee, S; Demorest, P B; Eggenstein, H B; Fehrmann, H; Gotthelf, E V; Hammer, D; Kaspi, V M; Kramer, M; Lyne, A G; Machenschalk, B; McLaughlin, M A; Messenger, C; Pletsch, H J; Ransom, S M; Stairs, I H; Stappers, B W; Bhat, N D R; Bogdanov, S; Camilo, F; Champion, D J; Crawford, F; Desvignes, G; Freire, P C C; Heald, G; Jenet, F A; Lazarus, P; Lee, K J; van Leeuwen, J; Lynch, R; Papa, M A; Prix, R; Rosen, R; Scholz, P; Siemens, X; Stovall, K; Venkataraman, A; Zhu, W

2013-01-01T23:59:59.000Z

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461

Bose-Einstein Condensation and Bose Glasses in an S = 1 Organo-metallic quantum magnet  

SciTech Connect (OSTI)

I will speak about Bose-Einstein condensation (BEC) in quantum magnets, in particular the compound NiCl2-4SC(NH2)2. Here a magnetic field-induced quantum phase transition to XY antiferromagnetism can be mapped onto BEC of the spins. The tuning parameter for BEC transition is the magnetic field rather than the temperature. Some interesting phenomena arise, for example the fact that the mass of the bosons that condense can be strongly renormalized by quantum fluctuations. I will discuss the utility of this mapping for both understanding the nature of the quantum magnetism and testing the thermodynamic limit of Bose-Einstein Condensation. Furthermore we can dope the system in a clean and controlled way to create the long sought-after Bose Glass transition, which is the bosonic analogy of Anderson localization. I will present experiments and simulations showing evidence for a new scaling exponent, which finally makes contact between theory and experiments. Thus we take a small step towards the difficult problem of understanding the effect of disorder on bosonic wave functions.

Zapf, Vivien [Los Alamos National Laboratory

2012-06-01T23:59:59.000Z

462

Energy distribution of a regular black hole solution in Einstein-nonlinear electrodynamics  

E-Print Network [OSTI]

In this work a study about the energy-momentum of a new four-dimensional spherically symmetric, static and charged, regular black hole solution developed in the context of general relativity coupled to nonlinear electrodynamics is presented. Asymptotically, this new black hole solution behaves as the Reissner-Nordstr\\"om solution only for the particular value {\\mu}=4, where {\\mu} is a positive integer parameter appearing in the mass function of the solution. The calculations are performed by use of the Einstein, Landau-Lifshitz, Weinberg and M{\\o}ller energy-momentum complexes. In all the aforesaid prescriptions, the expressions for the energy of the gravitating system considered depend on the mass M of the black hole, its charge q, a positive integer {\\alpha} and the radial coordinate r. In all these pseudotensorial prescriptions the momenta are found to vanish, while the Landau-Lifshitz and Weinberg prescriptions give the same result for the energy distribution. In addition, the limiting behavior of the energy for the cases r tends toward infinity, r=0 and q=0 is studied. The special case {\\mu}=4 and {\\alpha}=3 is also examined. We conclude that the Einstein and M{\\o}ller energy-momentum complexes can be considered as the most reliable tools for the study of the energy-momentum localization of a gravitating system.

I. Radinschi; F. Rahaman; Th. Grammenos; A. Spanou; Sayeedul Islam

2014-07-16T23:59:59.000Z

463

THE EINSTEIN-HOME SEARCH FOR RADIO PULSARS AND PSR J2007+2722 DISCOVERY  

SciTech Connect (OSTI)

Einstein-Home aggregates the computer power of hundreds of thousands of volunteers from 193 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using Pulsar ALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 minutes. We also describe the first Einstein-Home discovery, the 40.8 Hz isolated pulsar PSR J2007+2722, and provide a full timing model. PSR J2007+2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However, there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but cannot prove that PSR J2007+2722 is at least {approx}100 kyr old. In the future, we expect that the massive computing power provided by volunteers should enable many additional radio pulsar discoveries.

Allen, B.; Knispel, B.; Aulbert, C.; Bock, O.; Eggenstein, H. B.; Fehrmann, H.; Machenschalk, B. [Max-Planck-Institut fuer Gravitationsphysik, D-30167 Hannover (Germany); Cordes, J. M.; Brazier, A.; Chatterjee, S. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Deneva, J. S. [Arecibo Observatory, HC3 Box 53995, Arecibo, PR 00612 (United States); Hessels, J. W. T. [ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo (Netherlands); Anderson, D. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Demorest, P. B. [NRAO (National Radio Astronomy Observatory), Charlottesville, VA 22903 (United States); Gotthelf, E. V. [Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States); Hammer, D. [Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (United States); Kaspi, V. M. [Department of Physics, McGill University, Montreal, QC H3A2T8 (Canada); Kramer, M. [Max-Planck-Institut fuer Radioastronomie, D-53121 Bonn (Germany); Lyne, A. G. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom); McLaughlin, M. A., E-mail: bruce.allen@aei.mpg.de [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); and others

2013-08-20T23:59:59.000Z

464

Dynamical preparation of EPR entanglement in two-well Bose-Einstein condensates  

E-Print Network [OSTI]

We propose to generate Einstein-Podolsky-Rosen (EPR) entanglement between groups of atoms in a two-well Bose-Einstein condensate using a dynamical process similar to that employed in quantum optics. The local nonlinear S-wave scattering interaction has the effect of creating a spin squeezing at each well, while the tunneling, analogous to a beam splitter in optics, introduces an interference between these fields that results in an inter-well entanglement. We consider two internal modes at each well, so that the entanglement can be detected by measuring a reduction in the variances of the sums of local Schwinger spin observables. As is typical of continuous variable (CV) entanglement, the entanglement is predicted to increase with atom number, and becomes sufficiently strong at higher numbers of atoms that the EPR paradox and steering non-locality can be realized. The entanglement is predicted using an analytical approach and, for larger atom numbers, stochastic simulations based on truncated Wigner function. ...

Opanchuk, B; Reid, M D; Drummond, P D

2012-01-01T23:59:59.000Z

465

Relativistic Boltzmann transport approach with Bose-Einstein statistics and the onset of gluon condensation  

E-Print Network [OSTI]

We study the evolution of a gluon system under conditions of density and temperature similar to those explored in the early stage of ultra-relativistic heavy-ion collisions. We first describe the implementation of Relativistic Boltzmann-Nordheim (RBN) transport approach that includes in the collision integral the quantum effects of Bose-Einstein Statistics. Then, we describe the evolution of a spatially uniform gluon system in a box under elastic collisions solving the RBN for various initial conditions. We discuss the critical phase-space density that leads to the onset of a Bose-Einstein condensate (BEC) and the time scale for this process to occur. In particular, thanks to the fact that RBN allows to relax the small angle approximation, we study the effect at both small and large screening mass $ m_{D} $. For small $ m_{D}\\ll T $ we see that our solution of RBN is in agreement with the recent extensive studies within a Fokker-Planck scheme in small angle approximation. For the same total cross section but with large $ m_{D}\\simeq 2\\, T $ (large angle scatterings), we see a significant time speed-up of the onset of BEC respect to small $m_{D}\\ll T$. This further strengthen the possibility that at least a transient BEC is formed in the early stage of ultra-relativistic heavy-ion collisions.

F. Scardina; D. Perricone; S. Plumari; M. Ruggieri; V. Greco

2014-08-06T23:59:59.000Z

466

Bose-Einstein condensation in dark power-law laser traps  

SciTech Connect (OSTI)

We investigate theoretically an original route to achieve Bose-Einstein condensation using dark power-law laser traps. We propose to create such traps with two crossing blue-detuned Laguerre-Gaussian optical beams. Controlling their azimuthal order l allows for the exploration of a multitude of power-law trapping situations in one, two, and three dimensions, ranging from the usual harmonic trap to an almost square-well potential, in which a quasihomogeneous Bose gas can be formed. The usual cigar-shaped and disk-shaped Bose-Einstein condensates obtained in a 1D or 2D harmonic trap take the generic form of a 'finger' or of a 'hockey puck' in such Laguerre-Gaussian traps. In addition, for a fixed atom number, higher transition temperatures are obtained in such configurations when compared with a harmonic trap of the same volume. This effect, which results in a substantial acceleration of the condensation dynamics, requires a better but still reasonable focusing of the Laguerre-Gaussian beams.

Jaouadi, A. [Universite Paris-Sud, Institut des Sciences Moleculaires d'Orsay (ISMO), F-91405 Orsay (France); CNRS, Orsay, F-91405 France (France); Laboratoire de Spectroscopie Atomique, Moleculaire et Applications (LSAMA), Department of Physics, Faculty of Science of Tunis, University of Tunis El Manar, T-2092 Tunis (Tunisia); Gaaloul, N. [Institut fuer Quantenoptik, Welfengarten 1, Gottfried Wilhelm Leibniz Universitaet, D-30167 Hannover (Germany); Viaris de Lesegno, B.; Pruvost, L. [CNRS, Laboratoire Aime Cotton (LAC), F-91405 Orsay (France); Universite Paris-Sud, Orsay, F-91405 France (France); Telmini, M. [Laboratoire de Spectroscopie Atomique, Moleculaire et Applications (LSAMA), Department of Physics, Faculty of Science of Tunis, University of Tunis El Manar, T-2092 Tunis (Tunisia); Charron, E. [Universite Paris-Sud, Institut des Sciences Moleculaires d'Orsay (ISMO), F-91405 Orsay (France); CNRS, Orsay, F-91405 (France)

2010-08-15T23:59:59.000Z

467

Weberized Mumford-Shah Model with Bose-Einstein Photon Noise  

SciTech Connect (OSTI)

Human vision works equally well in a large dynamic range of light intensities, from only a few photons to typical midday sunlight. Contributing to such remarkable flexibility is a famous law in perceptual (both visual and aural) psychology and psychophysics known as Weber's Law. The current paper develops a new segmentation model based on the integration of Weber's Law and the celebrated Mumford-Shah segmentation model (Comm. Pure Appl. Math., vol. 42, pp. 577-685, 1989). Explained in detail are issues concerning why the classical Mumford-Shah model lacks light adaptivity, and why its 'weberized' version can more faithfully reflect human vision's superior segmentation capability in a variety of illuminance conditions from dawn to dusk. It is also argued that the popular Gaussian noise model is physically inappropriate for the weberization procedure. As a result, the intrinsic thermal noise of photon ensembles is introduced based on Bose and Einstein's distributions in quantum statistics, which turns out to be compatible with weberization both analytically and computationally. The current paper focuses on both the theory and computation of the weberized Mumford-Shah model with Bose-Einstein noise. In particular, Ambrosio-Tortorelli's {gamma}-convergence approximation theory is adapted (Boll. Un. Mat. Ital. B, vol. 6, pp. 105-123, 1992), and stable numerical algorithms are developed for the associated pair ofnonlinear Euler-Lagrange PDEs.

Shen Jianhong, E-mail: jhshen@math.umn.edu; Jung, Yoon-Mo [School of Mathematics, University of Minnesota, Minneapolis, MN 55455 (United States)], E-mail: ymjung@math.umn.edu

2006-05-15T23:59:59.000Z

468

Exact solutions and stability of rotating dipolar Bose-Einstein condensates in the Thomas-Fermi limit  

E-Print Network [OSTI]

We present a theoretical analysis of dilute gas Bose-Einstein condensates with dipolar atomic interactions under rotation in elliptical traps. Working in the Thomas-Fermi limit, we employ the classical hydrodynamic equations to first derive the rotating condensate solutions and then consider their response to perturbations. We thereby map out the regimes of stability and instability for rotating dipolar Bose-Einstein condensates and in the latter case, discuss the possibility of vortex lattice formation. We employ our results to propose several novel routes to induce vortex lattice formation in a dipolar condensate.

R. M. W. van Bijnen; A. J. Dow; D. H. J. O'Dell; N. G. Parker; A. M. Martin

2009-05-10T23:59:59.000Z

469

Primary and reciprocal space-time experiments, relativistic reciprocity relations and Einstein's train-embankment thought experiment  

E-Print Network [OSTI]

The concepts of primary and reciprocal experiments and base and travelling frames in special relativity are concisely described and applied to several different space-time experiments. These include Einstein's train/embankment thought experiment and a related thought experiment, due to Sartori, involving two trains in parallel motion with different speeds. Spatially separated clocks which are synchronised in their common proper frame are shown to be so in all inertial frames and their spatial separation to be Lorentz invariant. The interpretions given by Einstein and Sartori of their experiments, as well as those given by the present author in previous papers, are shown to be erroneous.

J. H. Field

2011-11-11T23:59:59.000Z

470

Thermalization of a Parametrically Driven Magnon Gas Leading to Bose-Einstein Condensation V. E. Demidov, O. Dzyapko, and S. O. Demokritov*  

E-Print Network [OSTI]

Thermalization of a Parametrically Driven Magnon Gas Leading to Bose-Einstein Condensation V. E samples [6] brought an opportunity for direct studies of multimagnon relaxation processes in a dense gas of the magnon gas in such a way that the gas undergoes Bose-Einstein condensation (BEC). For this fundamental

Demokritov, S.O.

471

Four-wave mixing in Bose-Einstein condensate systems with multiple spin states J. P. Burke, Jr.,* P. S. Julienne, and C. J. Williams  

E-Print Network [OSTI]

Four-wave mixing in Bose-Einstein condensate systems with multiple spin states J. P. Burke, Jr.,* P) We calculate the four-wave mixing (FWM) in a Bose-Einstein condensate system having multiple spin wave packets that are initially overlapping in physical space, but have nonvanishing relative momentum

Band, Yehuda B.

472

Analytical description of a trapped semi-ideal Bose-Gas One focus of research on dilute gas Bose-Einstein condensates is the study of  

E-Print Network [OSTI]

-Einstein condensates is the study of thermodynamic quantities such as the transition temperature to Bose-Einstein condensation, and the condensate fraction. In particular, for the dilute gas Bose condensates, the weak of interactions on a trapped partially condensed gas using an intuitive and accessible description

473

Analysis of in situ images of Bose-Einstein condensates of lithium C. C. Bradley, C. A. Sackett, and R. G. Hulet  

E-Print Network [OSTI]

Analysis of in situ images of Bose-Einstein condensates of lithium C. C. Bradley, C. A. Sackett analysis difficult. We find that the distortions resulted from light scattered by the condensate.80.Pj In a previous Letter 1 , we reported evidence for Bose- Einstein condensation BEC of a gas of 7 Li

Sackett, Cass

474

Natural orbitals and Bose-Einstein condensates in traps: A diffusion Monte Carlo analysis J. L. DuBois and H. R. Glyde  

E-Print Network [OSTI]

Natural orbitals and Bose-Einstein condensates in traps: A diffusion Monte Carlo analysis J. L. Du of the atoms in an ideal Bose gas can condense into a single quantum state. London 3,4 postulated in harmonic traps over a wide range of densities. Bose- Einstein condensation is formulated using the one

Glyde, Henry R.

475

Long storage time of collective coherence in an optically trapped Bose-Einstein condensate Yutaka Yoshikawa,1,2,* Kazuyuki Nakayama,2  

E-Print Network [OSTI]

of condensates, a high conversion efficiency of over 70% and a long storage time of about 0.13 ms were achievedLong storage time of collective coherence in an optically trapped Bose-Einstein condensate Yutaka- Einstein condensate Phys. Rev. Lett. 99, 220407 2007 . This time we report the drastic improvement

Torii, Yoshio

476

PHYSICAL REVIEW A 84, 043641 (2011) Optimized Bose-Einstein-condensate production in a dipole trap based on a 1070-nm  

E-Print Network [OSTI]

: unexpected high atom losses have been observed especially when using cost-efficient high-power multifrequencyPHYSICAL REVIEW A 84, 043641 (2011) Optimized Bose-Einstein-condensate production in a dipole trap-Einstein condensates (BEC) of 87 Rb in a crossed dipole trap with direct loading from a magneto-optical trap

Birkl, Gerhard

477

Mach-Zehnder Bragg interferometer for a Bose-Einstein condensate Yoshio Torii,* Yoichi Suzuki, Mikio Kozuma, Toshiaki Sugiura, and Takahiro Kuga  

E-Print Network [OSTI]

. This results in high efficiency 14 where, in principle, all of the atoms can contribute to the signal. NormalMach-Zehnder Bragg interferometer for a Bose-Einstein condensate Yoshio Torii,* Yoichi Suzuki a Mach-Zehnder interferometer using Bose-Einstein condensed rubidium atoms and optical Bragg diffraction

Torii, Yoshio

478

High-fidelity manipulation of a Bose-Einstein condensate using an optical standing wave K. J. Hughes, B. Deissler, J. H. T. Burke, and C. A. Sackett*  

E-Print Network [OSTI]

High-fidelity manipulation of a Bose-Einstein condensate using an optical standing wave K. J that Bragg diffraction can provide efficient beam-splitting and reflection operations for atomic wave packets using laser cooling or Bose-Einstein condensation 8,9 . This too has been applied to atom

Sackett, Cass

479

Bose-Einstein Condensates -Interview with Wolfgang Ketterle http://www.esi-topics.com/bose/interviews/WolfgangKetterle.html 1 of 6 6/19/2005 1:32 PM  

E-Print Network [OSTI]

Bose-Einstein Condensates - Interview with Wolfgang Ketterle http-Einstein Condensates Menu An INTERVIEW with Dr. Wolfgang Ketterle ESI Special Topics, March 2004 Citing URL - http://www.esi-topics.com/bose/interviews/WolfgangKetterle.html #12;Bose-Einstein Condensates - Interview with Wolfgang Ketterle http

480

COLD ATOMS AND CREATION OF NEW STATES OF MATTER: BOSE-EINSTEIN CONDENSATES, KAPITZA STATES, AND '2D MAGNETIC  

E-Print Network [OSTI]

COLD ATOMS AND CREATION OF NEW STATES OF MATTER: BOSE- EINSTEIN CONDENSATES, KAPITZA STATES, AND '2D MAGNETIC HYDROGEN ATOMS' LENE VESTERGAARD HAU, B. D. BUSCH, CHIEN LIU, MICHAEL M. BURNS, AND J. A, Electronic and Atomic Collisions (Invited papers of the Twentieth International Conference on the Physics

Hau, Lene Vestergaard

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481

Compatibility of Einstein minimally coupled self interacting scalar field theory with the solar system tests of gravity  

E-Print Network [OSTI]

We examine the compatibility of the Einstein minimally coupled self-interacting scalar field theory with the local tests of gravity. We find that apart from the trivial case of the Schwarzschild-de Sitter solution with constant scalar field the theory does not admit any other static solution, which is consistent with the solar system tests of gravity.

A. Bhadra

2008-10-06T23:59:59.000Z

482

hal-00110808,version1-2Nov2006 Bose-Einstein condensates and EPR quantum non-locality  

E-Print Network [OSTI]

hal-00110808,version1-2Nov2006 Bose-Einstein condensates and EPR quantum non-locality F. Lalo The EPR argument points to the existence of additional variables that are necessary to complete standard systems, independently of the macroscopic measurement apparatus. Here, we transpose the EPR argument

Paris-Sud XI, Université de

483

Transport of Bose-Einstein Condensates with Optical Tweezers Conventional condensate production techniques severely limit optical and mechanical  

E-Print Network [OSTI]

Transport of Bose-Einstein Condensates with Optical Tweezers Conventional condensate production to manipulate and study condensates has been a major restriction to previous experiments. So far, most experiments were carried out within a few millimeters of where the condensate was created. What is highly

484

ccsd-00003161,version1-26Oct2004 Vortex patterns in a fast rotating Bose-Einstein condensate  

E-Print Network [OSTI]

of the rotating gas increases and tends to infinity, and the number of vortices in the condensate diverges [5, 6. Furthermore we restrict our analysis to the case of a two- dimensional gas in the xy plane, assumingccsd-00003161,version1-26Oct2004 Vortex patterns in a fast rotating Bose-Einstein condensate

485

Reply to "Comment on `Stimulated Raman adiabatic passage from an atomic to a molecular Bose-Einstein condensate' "  

E-Print Network [OSTI]

to no efficiency improvement compared to our high-density case. In a more careful analysis including radiative-Einstein condensate' " P. D. Drummond and K. V. Kheruntsyan ARC Centre of Excellence for Quantum-Atom Optics January 2005 In the preceding Comment, the authors suggest that the molecular conversion efficiency

Queensland, University of

486

Holographic Storage of Multiple Coherence Gratings in a Bose-Einstein Condensate Yutaka Yoshikawa,1,2,* Kazuyuki Nakayama,2  

E-Print Network [OSTI]

of the condensate, a high conversion efficiency of >70% and a long storage time of >120 s were achieved. DOI: 10Holographic Storage of Multiple Coherence Gratings in a Bose-Einstein Condensate Yutaka Yoshikawa,1 in an elongated cloud of Bose-condensed atoms. Two off-resonant write beams induce superradiant Raman scattering

Torii, Yoshio

487

Théorèmes de de Finetti, limites de champ moyen et condensation de Bose-Einstein  

E-Print Network [OSTI]

These lecture notes treat the mean-field approximation for equilibrium states of N body systems in classical and quantum statistical mechanics. A general strategy to justify effective models based on assumptions of statistical independence of the particles is in presented in detail. The main tools are a structure theorems of de Finetti that describe large N limits of states accessible to the systems in question, exploiting the indistinguishablity of particles. The focus is on quantum aspects, particularly the mean-field approximation for the ground state of a large system of bosons, in connection with Bose-Einstein condensation: structure of reduced density matrices of a large bosonic system, localization methods in Fock space, derivation of Hartree and non-linear Schr\\"odinger effective energy functionals.

Nicolas Rougerie

2015-02-13T23:59:59.000Z

488

Holes in the static Einstein universe and a model of the cosmological voids  

SciTech Connect (OSTI)

A spherically symmetric, static model of the cosmological voids is constructed in the framework of the Tolman-Oppenheimer-Volkov equation with the cosmological constant. Extension of the Tooper result (dimensionless form of the TOV equation) is provided for nonzero {lambda}. Then, the equation is simplified in {alpha}{yields}0, {lambda}{yields}0, and {lambda}/{alpha}=const regime, suitable for largest structures in {lambda}-dominated universe. Voids are treated as underdensity regions in the static Einstein universe. Both overdensity and underdensity (relative to static universe) solutions exist. They are identified with standard astrophysical spherical objects and voids, respectively. The model is tested against observed properties (the radius - the central density relation) and density profiles of voids. Analytical formulas for radial density contrast profile and radii of the voids are derived. Some consequences for cosmological N-body simulations are suggested. Hints on the dark matter/dark energy EOS filling the voids are provided.

Odrzywolek, Andrzej [M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Krakow (Poland)

2009-11-15T23:59:59.000Z

489

Multipartite Einstein-Podolsky-Rosen steering and genuine tripartite entanglement with optical networks  

E-Print Network [OSTI]

The Einstein-Podolsky-Rosen (EPR) paradox established a link between entanglement and nonlocality in quantum mechanics. EPR steering is the nonlocality associated with the EPR paradox and has traditionally only been investigated between two parties. Here, we present the first experimental observations of multipartite EPR steering, and of the genuine tripartite continuous variable entanglement of three mesoscopic optical systems. We explore different linear optics networks - each one with optimised asymmetries - that create multipartite steerable states containing different numbers of quantised optical modes (qumodes). By introducing asymmetric loss on a 7-qumode state, we characterize 8 regimes of directional steering, showing that N + 1 regimes exist for an N-qumode state. Further, we reveal the directional monogamy of steering, and experimentally demonstrate continuous variable one-sided semi device-independent quantum secret sharing. Our methods establish principles for the development of multiparty quantum communication protocols with asymmetric observers, and can be extended to qubits, whether photonic, atomic, superconducting, or otherwise.

Seiji Armstrong; Meng Wang; Run Yan Teh; Qihuang Gong; Qiongyi He; Jiri Janousek; Hans-Albert Bachor; Margaret D. Reid; Ping Koy Lam

2014-12-22T23:59:59.000Z

490

Thermodynamics of black holes in $(n+1)$-dimensional Einstein-Born-Infeld dilaton gravity  

E-Print Network [OSTI]

We construct a new class of $(n+1)$-dimensional $(n\\geq3)$ black hole solutions in Einstein-Born-Infeld-dilaton gravity with Liouville-type potential for the dilaton field and investigate their properties. These solutions are neither asymptotically flat nor (anti)-de Sitter. We find that these solutions can represent black holes, with inner and outer event horizons, an extreme black hole or a naked singularity provided the parameters of the solutions are chosen suitably. We compute the thermodynamic quantities of the black hole solutions and find that these quantities satisfy the first law of thermodynamics. We also perform stability analysis and investigate the effect of dilaton on the stability of the solutions.

A. Sheykhi; N. Riazi

2006-10-08T23:59:59.000Z

491

Chaotic behavior of three interacting vortices in a confined Bose-Einstein condensate  

E-Print Network [OSTI]

Motivated by recent experimental works, we investigate a system of vortex dynamics in an atomic Bose-Einstein condensate (BEC), consisting of three vortices, two of which have the same charge. These vortices are modeled as a system of point particles which possesses a Hamiltonian structure. This tripole system constitutes a prototypical model of vortices in BECs exhibiting chaos. By using the angular momentum integral of motion we reduce the study of the system to the investigation of a two degree of freedom Hamiltonian model and acquire quantitative results about its chaotic behavior. Our investigation tool is the construction of scan maps by using the Smaller ALignment Index (SALI) as a chaos indicator. Applying this approach to a large number of initial conditions we manage to accurately and efficiently measure the extent of chaos in the model and its dependence on physically important parameters like the energy and the angular momentum of the system.

Nikos Kyriakopoulos; Vassilis Koukouloyannis; Charalampos Skokos; Panayotis Kevrekidis

2014-05-14T23:59:59.000Z

492

Planck Scale Induced Speed of Sound in a Trapped Bose-Einstein Condensate  

E-Print Network [OSTI]

In the present work, we analyze the corrections caused by an anomalous dispersion relation, suggested in several quantum gravity models, upon the speed of sound in a weakly interacting Bose--Einstein Condensate, trapped in a potential of the form $V(r)\\sim r^{2}$. We show that the corresponding ground state energy and consequently, the associated speed of sound, present corrections respect to the usual case, which may be used to explore the sensitivity to Planck--scale effects on these relevant properties associated with the condensate. Indeed, we stress that this type of macroscopic bodies may be more sensitive, under certain conditions, to Planck--scale manifestations than its constituents. In addition, we prove that the inclusion of a trapping potential, together with many--body contributions, improves the sensitivity to Planck--scale signals, compared to the homogeneous system.

E. Castellanos; J. I. Rivas; V. Domínguez-Rocha

2014-07-11T23:59:59.000Z

493

Signals of Bose Einstein condensation and Fermi quenching in the decay of hot nuclear systems  

E-Print Network [OSTI]

We report experimental signals of Bose-Einstein condensation in the decay of hot Ca projectile-like sources produced in mid-peripheral collisions at sub-Fermi energies. The experimental setup, constituted by the coupling of the INDRA 4$\\pi$ detector array to the forward angle VAMOS magnetic spectrometer, allowed us to reconstruct the mass, charge and excitation energy of the decaying hot projectile-like sources. Furthermore, by means of quantum fluctuation analysis techniques, temperatures and mean volumes per particle "as seen by" bosons and fermions separately are correlated to the excitation energy of the reconstructed system. The obtained results are consistent with the production of dilute mixed (bosons/fermions) systems, where bosons experience a smaller volume as compared to the surrounding fermionic gas. Our findings recall similar phenomena observed in the study of boson condensates in atomic traps.

P. Marini; H. Zheng; M. Boisjoli; G. Verde; A. Chbihi; G. Ademard; L. Auger; C. Bhattacharya; B. Borderie; R. Bougault; J. Frankland; E. Galichet; D. Gruyer; S. Kundu; M. La Commara; I. Lombardo; O. Lopez; G. Mukherjee; P. Napolitani; M. Parlog; M. F. Rivet; E. Rosato; R. Roy; G. Spadaccini; M. Vigilante; P. C. Wigg; A. Bonasera

2015-01-03T23:59:59.000Z

494

Einstein gravity as the thermodynamic limit of an underlying quantum statistics  

E-Print Network [OSTI]

The black hole area theorem suggests that classical general relativity is the thermodynamic limit of a quantum statistics. The degrees of freedom of the statistical theory cannot be the spacetime metric. We argue that the statistical theory should be constructed from a noncommutative gravity, whose classical, and thermodynamic, approximation is Einstein gravity. The noncommutative gravity theory exhibits a duality between quantum fields and macroscopic black holes, which is used to show that the black hole possesses an entropy of the order of its area. The principle on which this work is based also provides a possible explanation for the smallness of the cosmological constant, and for the quantum measurement problem, indicating that this is a promising avenue towards the merger of quantum mechanics and gravity.

T. P. Singh

2009-05-15T23:59:59.000Z

495

Analogue quantum gravity phenomenology from a two-component Bose-Einstein condensate  

E-Print Network [OSTI]

We present an analogue spacetime model that reproduces the salient features of the most common ansatz for quantum gravity phenomenology. We do this by investigating a system of two coupled Bose-Einstein condensates. This system can be tuned to have two "phonon" modes (one massive, one massless) which share the same limiting speed in the hydrodynamic approximation [Phys. Rev. D72 (2005) 044020, gr-qc/0506029; cond-mat/0409639]. The system nevertheless possesses (possibly non-universal) Lorentz violating terms at very high energies where "quantum pressure" becomes important. We investigate the physical interpretation of the relevant fine-tuning conditions, and discuss the possible lessons and hints that this analogue spacetime could provide for the phenomenology of real physical quantum gravity. In particular we show that the effective field theory of quasi-particles in such an emergent spacetime does not exhibit the so called "naturalness problem".

Stefano Liberati; Matt Visser; Silke Weinfurtner

2006-03-16T23:59:59.000Z

496

Thermodynamics of black holes in (n+1)-dimensional Einstein-Born-Infeld-dilaton gravity  

SciTech Connect (OSTI)

We construct a new class of (n+1)-dimensional (n{>=}3) black hole solutions in Einstein-Born-Infeld-dilaton gravity with Liouville-type potential for the dilaton field and investigate their properties. These solutions are neither asymptotically flat nor (anti)-de Sitter. We find that these solutions can represent black holes, with inner and outer event horizons, an extreme black hole, or a naked singularity provided the parameters of the solutions are chosen suitably. We compute the thermodynamic quantities of the black hole solutions and find that these quantities satisfy the first law of thermodynamics. We also perform a stability analysis and investigate the effect of dilaton on the stability of the solutions.

Sheykhi, A. [Physics Department and Biruni Observatory, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Physics Department, Shahid Bahonar University, Kerman (Iran, Islamic Republic of); Riazi, N. [Physics Department and Biruni Observatory, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of)

2007-01-15T23:59:59.000Z

497

Vacuum energy in Einstein-Gauss-Bonnet anti-de Sitter gravity  

SciTech Connect (OSTI)

A finite action principle for Einstein-Gauss-Bonnet anti-de Sitter gravity is achieved by supplementing the bulk Lagrangian by a suitable boundary term, whose form substantially differs in odd and even dimensions. For even dimensions, this term is given by the boundary contribution in the Euler theorem with a coupling constant fixed, demanding the spacetime to have constant (negative) curvature in the asymptotic region. For odd dimensions, the action is stationary under a boundary condition on the variation of the extrinsic curvature. A well-posed variational principle leads to an appropriate definition of energy and other conserved quantities using the Noether theorem, and to a correct description of black hole thermodynamics. In particular, this procedure assigns a nonzero energy to anti-de Sitter spacetime in all odd dimensions.

Kofinas, Georgios [Departament de Fisica Fonamental, Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain); Olea, Rodrigo [Centro Multidisciplinar de Astrofisica-CENTRA, Departamento de Fisica, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisbon (Portugal)

2006-10-15T23:59:59.000Z

498

Signals of Bose Einstein condensation and Fermi quenching in the decay of hot nuclear systems  

E-Print Network [OSTI]

We report experimental signals of Bose-Einstein condensation in the decay of hot Ca projectile-like sources produced in mid-peripheral collisions at sub-Fermi energies. The experimental setup, constituted by the coupling of the INDRA 4$\\pi$ detector array to the forward angle VAMOS magnetic spectrometer, allowed us to reconstruct the mass, charge and excitation energy of the decaying hot projectile-like sources. Furthermore, by means of quantum fluctuation analysis techniques, temperatures and mean volumes per particle "as seen by" bosons and fermions separately are correlated to the excitation energy of the reconstructed system. The obtained results are consistent with the production of dilute mixed (bosons/fermions) systems, where bosons experience a smaller volume as compared to the surrounding fermionic gas. Our findings recall similar phenomena observed in the study of boson condensates in atomic traps.

Marini, P; Boisjoli, M; Verde, G; Chbihi, A; Ademard, G; Auger, L; Bhattacharya, C; Borderie, B; Bougault, R; Frankland, J; Galichet, E; Gruyer, D; Kundu, S; La Commara, M; Lombardo, I; Lopez, O; Mukherjee, G; Napolitani, P; Parlog, M; Rivet, M F; Rosato, E; Roy, R; Spadaccini, G; Vigilante, M; Wigg, P C; Bonasera, A

2015-01-01T23:59:59.000Z

499

Functional Wigner representation of quantum dynamics of Bose-Einstein condensate  

SciTech Connect (OSTI)

We develop a method of simulating the full quantum field dynamics of multi-mode multi-component Bose-Einstein condensates in a trap. We use the truncated Wigner representation to obtain a probabilistic theory that can be sampled. This method produces c-number stochastic equations which may be solved using conventional stochastic methods. The technique is valid for large mode occupation numbers. We give a detailed derivation of methods of functional Wigner representation appropriate for quantum fields. Our approach describes spatial evolution of spinor components and properly accounts for nonlinear losses. Such techniques are applicable to calculating the leading quantum corrections, including effects such as quantum squeezing, entanglement, EPR correlations, and interactions with engineered nonlinear reservoirs. By using a consistent expansion in the inverse density, we are able to explain an inconsistency in the nonlinear loss equations found by earlier authors.

Opanchuk, B.; Drummond, P. D. [Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Hawthorn VIC 3122 (Australia)] [Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Hawthorn VIC 3122 (Australia)

2013-04-15T23:59:59.000Z

500

Evolution of the interacting viscous dark energy model in Einstein cosmology  

E-Print Network [OSTI]

In this paper we investigate the evolution of the viscous dark energy (DE) interacting with the dark matter (DM) in the Einstein cosmology model. Using the linearizing theory of the dynamical system, we find, in our model, there exists a stable late time scaling solution which corresponds to the accelerating universe, and we also find the unstable solution under some appropriate parameters. In order to alleviate the coincidence problem, some authors considered the effect of quantum correction due to the conform anomaly and the interacting dark energy model. But if we take into account the bulk viscosity of the cosmic fluid, the coincidence problem will be softened just like the interacting dark energy cosmology model. That's to say, both the non-perfect fluid model and the interacting models of the dark energy can alleviate or soften the singularity of the universe.

Juhua Chen; Yongjiu Wang

2009-09-05T23:59:59.000Z