PHYSICS AND REALITY. ALBERT EINSTEIN.
Kostic, Milivoje M.
PHYSICS AND REALITY. BY ALBERT EINSTEIN. (Translation by Jean Piccard.) § I. GENERALCONSIDERATION " of their connection. But even the concept of the Copyright, 1936, by Albert Einstein. 349 www.kostic.niu.eduHosted by Prof. M. Kostic at: Physics and Reality by Albert Einstein #12;35 ° ALBERT EINSTEIN. [J. F. I. " real
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.
The Collected Papers of Albert Einstein
Landweber, Laura
The Collected Papers of Albert Einstein The Collected Papers of Albert Einstein is one of the most from among more than 40,000 documents contained in the personal collection of Albert Einstein now housed at the Albert Ein- stein Archives at Hebrew University,and 15,000 Ein- stein and Einstein
Albert Einstein, 1905: Ein 3-Gange Menu
Dutz, Hartmut
. Albert Einstein, 1905: Ein 3-G¨ange Men¨u In Zusammenarbeit mit dem Deutschen Museum Bonn 6. M: Michael Kortmann, Markus Bernhardt #12;. Albert Einstein, 1905: Ein 3-G¨ange Physik draan #12;Speiseplan Einstein 1905: Biografisches ***** Brownsche Molekularbewegung
Albert Einstein: Relativity, War, Daniel J. Kevles
Landweber, Laura
Albert Einstein: Relativity, War, and Fame Daniel J. Kevles In 1922, Princeton University Press published Albert Einstein's The Meaning of Relativity, a popularization of his theory that has remained number of volumes by and about Einstein that the Press has published, a number that continues to grow
Howard, Don
Albert Einstein on the Relationship between Philosophy and Physics Albert Einstein to Robert A. Albert Einstein. "Ernst Mach."Physikalische Zeitschrift17 (1916): 101, 102 (A memorial notice
albert einstein chief engineer: Topics by E-print Network
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equipment owned by or in the possession of the Albert Einstein College Brown, Lucy L. 14 Engineering Virtualized Services Elvira Albert Computer Technologies and Information...
Albert Einstein In the spring of 1921, five
Landweber, Laura
Albert Einstein In the spring of 1921, five years after the appear- ance of his comprehensive paper Study, Albert Einstein toured the United States to help raise funds for the establishment of a Hebrew; the remaining three, more technical in nature, formed the rest of the book. In subsequent editions, Einstein
Howard, Don
Einstein: Physicist, Philosopher, Humanitarian Youngstown State March 25, 2009 Albert Einstein and Philosophy of Science University of Notre Dame Youngstown State University March 25, 2009 Einstein as a college student, ca. 1900 #12;Einstein: Physicist, Philosopher, Humanitarian Youngstown State March 25
The Collaboration of Mileva Maric and Albert Einstein
Asmodelle, Estelle
2015-01-01T23:59:59.000Z
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...
Zurek awarded Albert Einstein professorship prize
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Albert Einstein Distinguished Educator Fellowship (AEF) Program Homepage |
Office of Science (SC) Website
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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...
Albert Einstein's close friends and colleagues from the Patent Office
Weinstein, Galina
2012-01-01T23:59:59.000Z
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.
albert einstein und: Topics by E-print Network
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as it was before him. It is followed by a brief account of the problem of black body radiation which provided the context for Planck to introduce the idea of quantum. Einstein's...
Albert Einstein College of Medicine o f y e s h i va u n i v e r s i t y
Yates, Andrew
1 Albert Einstein College of Medicine o f y e s h i va u n i v e r s i t y 2 0 0 9 2 0 1 0 A n n u A l R E p o R t #12;2 science to medicine Albert Einstein College of Medicine is at the forefront-researcher divide 52 Our Supporters 58 On the COver: Left, naomi Maria assists in the einstein laboratory of John S
Horner, Jack K.
WAS EINSTEIN A LAPLACEAN? Jack Horner It is surely a truism that the science and philosophy of an age influence one another, and this century has been no exception: the rise of the quantum theory profoundly threatened the most promising... distinguished physicists, Niels Bohr and Albert Einstein. It is widely believed that the dynamics of this dialogue were dictated by an overview of "physical reality" held by Einstein. Such interpretations typically presume that Einstein's arguments...
Albert Einstein Distinguished Educator Fellowship Act of 1994 in U.S.C. |
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Mehra, J.
1987-05-01T23:59:59.000Z
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.
Albert Einstein - Hanford Site
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Transforming Education at Einstein
Yates, Andrew
Transforming Education at Einstein EinstEin Winter/spring 2012 The Magazine for Alumni and Friends of Albert Einstein College of Medicine of Yeshiva University #12;2 EinstEin : WintEr/spring 2012 Meet Our interactive Companion Magazine Give Einstein's "virtual" version a try! this interactive version
THE CAMPAIGN TO TRANSFORM EINSTEIN 2 THE CAMPAIGN TO TRANSFORM EINSTEIN
Yates, Andrew
THE CAMPAIGN TO TRANSFORM EINSTEIN #12;2 THE CAMPAIGN TO TRANSFORM EINSTEIN #12;ALBERT EINSTEIN COLLEGE OF MEDICINE 1 F or more than five decades, Albert Einstein College of Medicine has responded to the changing landscape of biomedical research with a commitment to improving human health. Einstein's research
Vasant Natarajan; V Balakrishnan; N Mukunda
2013-07-12T23:59:59.000Z
With each passing year, the young Albert Einstein's achievements in physics in the year 1905 seem to be ever more miraculous. We describe why the centenary of this remarkable year is worthy of celebration.
Philippe Depouilly, Albert Shih
van Tiggelen, Bart
vmware GSX Philippe Depouilly, Albert Shih Mathrice La PLM Les services Les contraintes Les 2006 #12;vmware GSX Philippe Depouilly, Albert Shih Mathrice La PLM Les services Les contraintes Les travers la Plateforme en Ligne Mathrice (PLM) #12;vmware GSX Philippe Depouilly, Albert Shih Mathrice La
2013 Fall : Distinguished Honors Distinguished
Kasman, Alex
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
2012 Spring : Distinguished Honors Distinguished
Kasman, Alex
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
2010 Spring : Distinguished Honors Distinguished
Kasman, Alex
Arthur Distinguished Brooksbank Michelle Dales Distinguished Brown Kayla Alexis Distinguished Buddin Ingelsby Distinguished Calhoun Stacy Michelle Distinguished Campbell Brian Joseph Distinguished Campbell
2009 Fall : Distinguished Honors Distinguished
Kasman, Alex
Distinguished Brooksbank Michelle Dales Distinguished Brown Anna Laughlin Distinguished Bruynell Trisha N Campbell Brian Joseph Distinguished Campbell Kathryn Elizabeth Distinguished Cannon Micah Q Distinguished
2014 Spring : Distinguished Honors Distinguished
Kasman, Alex
Lauren Ashley Distinguished Brophy Samantha Eileen Distinguished Brown Olivia Leigh Distinguished Brown Distinguished Campbell Christopher Reid Distinguished Campbell Elizabeth Merritt Distinguished Campbell Mitchell
2008 Fall : Distinguished Honors Distinguished
Kasman, Alex
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
2013 Spring : Distinguished Honors Distinguished
Kasman, Alex
Adams Olivia Leigh Distinguished Adickes Elizabeth Bryant Distinguished Advani Kirti Priya Distinguished Diane Rose Distinguished Brahney Meghan Elizabeth Distinguished Brantley Kindall G Distinguished
2011 Spring : Distinguished Honors Distinguished
Kasman, Alex
Distinguished Borges Catherine Rebecca Distinguished Bowen Meredith Ann Distinguished Bowers Michelle Diane Distinguished Bryan Brittany Alexandra Distinguished Bryant Taylor Danielle Distinguished Buazza Maryam Mahmud
2011 Fall : Distinguished Honors Distinguished
Kasman, Alex
Distinguished Bayag Kaitlyn Marie Distinguished Beanland Alexandra Sara Distinguished Beck Misty Nicole_NAME MIDDLE_NAME HONORS Brewer Patrick Kelly Distinguished Brig Kristin Victoria Distinguished Brindisi Alessi
2009 Spring : Distinguished Honors Distinguished
Kasman, Alex
_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
EINSTEIN POLICY ON OUTSIDE PROFESSIONAL INCOME BACKGROUND
Kenny, Paraic
EINSTEIN POLICY ON OUTSIDE PROFESSIONAL INCOME 1 BACKGROUND: The System of Appointments with the rules and regulations prescribed by the College of Medicine from time to time." The Albert Einstein to the management of professional fees or other outside income earned by individuals holding Einstein faculty
Einstein Room Reservations Rules and Regulations
Yates, Andrew
Einstein Room Reservations Rules and Regulations Before Reservation: Requests are not confirmed Activities, Joan Junger, (718) 430-2105 or student.activities@einstein.yu.edu. A meeting or conversation in accordance to Albert Einstein College of Medicine's Alcohol Policy. Before your request is confirmed you must
Einstein M.D. Program 20132014 applicant guide
Emmons, Scott
Einstein M.D. Program 20132014 applicant guide O F Y E S H I V A U N I V E R S I T Y Albert Einstein College of Medicine #12;2 Welcome Explore how Einstein can give you the skills to develop, learning opportunities and experiences that create the unique educational environment at Einstein
Einstein M.D. Program 20112012 applicant guide
Jenny, Andreas
Einstein M.D. Program 20112012 applicant guide O F Y E S H I V A U N I V E R S I T Y Albert Einstein College of Medicine #12;2 Welcome Explore how Einstein can give you the skills to develop, learning opportunities and experiences that create the unique educational environment at Einstein
Einstein's Philosophy of Science
Holmer, Bruce
EINSTEIN'S PHILOSOPHY OF SCIENCE Bt'uce Hoi me i" Consider a beginning scientist who pJans to perform a series of experiments. Before he can begin he must have a philosophical basis from which he will plan his activity. For instance, why does... interest, not only because of his contributions to science, but also because he spoke in great detail about his own philosophy, is Albert Einstein. This paper will cover only three main aspects of Einstein's philosophy of science: the nature...
2012 Fall : Highly Distinguished Honors Highly Distinguished
Kasman, Alex
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
2009 Spring : Highly Distinguished Honors Highly Distinguished
Kasman, Alex
Highly Distinguished Bowers Michelle Diane Highly Distinguished Bowling Joseph David Highly Distinguished Ashley Highly Distinguished Bryant Catherine Clancy Highly Distinguished Buckheister Elaine A Highly
2012 Spring : Highly Distinguished Honors Highly Distinguished
Kasman, Alex
Highly Distinguished Beck Misty Nicole Highly Distinguished Beckett Ethan Patrick Highly Distinguished Sara Nicole Highly Distinguished Borland Kelly Nicole Highly Distinguished Bosshardt Zachary Michael
2011 Spring : Highly Distinguished Honors Highly Distinguished
Kasman, Alex
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
Einstein M.D. Program 20142015 APPLICANT GUIDE
Emmons, Scott
Einstein M.D. Program 20142015 APPLICANT GUIDE O F Y E S H I V A U N I V E R S I T Y Albert Einstein College of Medicine #12;2 Welcome Explore how Einstein can give you the skills to develop at Einstein. There are 183 students in the first- year class. 8,193 applicants applied for entrance and 1
2013 Fall : Highly Distinguished Honors Highly Distinguished
Kasman, Alex
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
THE AMERICAS Albert Bierstadt, Puget
Hochberg, Michael
THE AMERICAS Albert Bierstadt, Puget Sound on the Pacific Coast A Superb Vision of Dreamland's spectacular, eight-foot- wide view of Puget Sound, which he painted but never visited. JULY 2011. 64 PP., 40
Einstein's Clocks, Poincar's Maps: An Interview with Peter Galison, Donald A. Yerxa
Galison, Peter L.
Einstein's Clocks, Poincaré's Maps: An Interview with Peter Galison, Part I Donald A. Yerxa, 1920), 9. Einstein's Clocks, Poincaré's Maps:An Interview With Peter Galison, Part I Conducted by Donald A. Yerxa Albert Einstein has becomean icon of20th-century science; indeed, he may wellstandas
EINSTEINSpring 2007 spring 2007 I EinstEin
Yates, Andrew
;spring 2007 I EinstEin eInSTeInCONTENTs 3 A meSSAge from the deAn 4 Children with AidS: the remarkableSiCiAn Ben Brody, Class of 2007 32 newS from the lAbS 35 Around the CAmpuS 26 22 14 4 3 Spring 2007 eInSTeIn: A publication for faculty, students, alumni, friends and supporters of the Albert einstein College of Medicine
Galison, Peter L.
Einstein for the 21st Century: His Legacy in Science, Art, and Modern Culture by Peter L. Galison and Gerald Holton and Silvan S. Schweber Einstein's Worldview and Its Effects A review by Daniel Kennefick: Albert Einstein's influence on society and culture. Einstein is strongly associated with modernism
Albert R Meyer April 1, 2013 sexgraph.1 Graph Theory
Meyer, Albert R.
1 Albert R Meyer April 1, 2013 sexgraph.1 Graph Theory & Sex Albert R Meyer April 1, 2013 sexgraph women partners Albert R Meyer April 1, 2013 sexgraph.3 Sex in America: Men more Promiscuous? Studies this is nonsense Albert R Meyer April 1, 2013 sexgraph.4 M partners F Sex Partner Graph #12;2 Albert R Meyer April
Albert-Ludwigs-Universitt Freiburg Styleguide Logo Albert-Ludwigs-Universitt Freiburg
Schindelhauer, Christian
Albert-Ludwigs-Universität Freiburg Styleguide Logo #12;2 Styleguide Logo Albert-Ludwigs-Universität Freiburg Richtlinien zur Verwendung der neuen Logos der Albert-Ludwigs-Universität Freiburg Abb.01: Die Grundver- sionen des Logos Sehr geehrte Verwenderinnen unseres neuen Logos, hier erläutern wir die
albert einstein centenary: Topics by E-print Network
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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...
albert einstein otto: 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...
albert einstein cancer: 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...
ausstellung albert einstein: Topics by E-print Network
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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...
The Albert Einstein College of Medicine of Yeshiva University
Jenny, Andreas
............................................................................................................................. 20 FIRE 21 HAZARDOUS MATERIALS 22 HAZARDOUS MATERIALS SPECIAL 24 HAZARD INDICATORS...................................................................................................................... 26 HAZARDOUS MATERIALS 27 HAZARDOUS MATERIALS 28 MAJOR NATURAL DISASTERS and Emergency Numbers......... 66 APPENDIX 4 Location of Safety Data Sheet Stations...................................
Albert Einstein Alerts President Roosevelt of German Atomic Energy Program
National Nuclear Security Administration (NNSA)
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FLOOD WARNING SYSTEM LOGAN & ALBERT RIVERS
Greenslade, Diana
. The system provides early warning of heavy rainfalls and river rises throughout the catchment and enablesFLOOD WARNING SYSTEM for the LOGAN & ALBERT RIVERS This brochure describes the flood warning system of Meteorology operates a flood warning system for the Logan and Albert River catchments based on a rainfall
Albert Carnesale | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
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D. Song
2013-04-16T23:59:59.000Z
An account of the subjective elements of quantum mechanics or of whether, as Einstein famously asked, the Moon exists when nobody is looking at it.
Einstein: His Impact on Accelerators; His Impact on theWorld
Sessler, A.
2005-07-30T23:59:59.000Z
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).
None
2011-04-25T23:59:59.000Z
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(?)
Celebrating Einstein A Series of Articles
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C o .FornlA Series of Articles "Albert Einstein
albert einsteini geeniuse: Topics by E-print Network
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a novel approach Puebla, Germn 23 5 Measuring Behavioral Energetics Albert F. Bennett Environmental Sciences and Ecology Websites Summary: 5 Measuring Behavioral...
van Dongen, Jeroen
2015-01-01T23:59:59.000Z
The Einstein-Rupp experiments have been unduly neglected in the history of quantum mechanics. While this is to be explained by the fact that Emil Rupp was later exposed as a fraud and had fabricated the results, it is not justified, due to the importance attached to the experiments at the time. This paper discusses Rupp's fraud, the relation between Albert Einstein and Rupp, and the Einstein-Rupp experiments, and argues that these experiments were an influence on Niels Bohr's development of complementarity and Werner Heisenberg's formulation of the uncertainty relations.
A new perspective on steady-state cosmology: from Einstein to Hoyle
O'Raifeartaigh, Cormac
2015-01-01T23:59:59.000Z
We recently reported the discovery of an unpublished manuscript by Albert Einstein in which he attempted a 'steady-state' model of the universe, i.e., a cosmic model in which the expanding universe remains essentially unchanged due to a continuous formation of matter from empty space. The manuscript was apparently written in early 1931, many years before the steady-state models of Fred Hoyle, Hermann Bondi and Thomas Gold. We compare Einstein's steady-state cosmology with that of Hoyle, Bondi and Gold and consider the reasons Einstein abandoned his model. The relevance of steady-state models for today's cosmology is briefly reviewed.
Primack, Joel (University of California, Santa Cruz) [University of California, Santa Cruz
2007-10-08T23:59:59.000Z
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.
STEM Mentoring Café- Engaging Young Women in an Authentic Mentoring...
Office of Environmental Management (EM)
Melinda Higgins Albert Einstein Distinguished Educator Fellow, NASA Office of Education, Headquarters and Goddard Space Flight Center It is a well-known fact: The...
STEM Mentoring Café- Engaging Young Women in an Authentic Mentoring...
Broader source: Energy.gov (indexed) [DOE]
Engaging Young Women in an Authentic Mentoring Experience Melinda Higgins Albert Einstein Distinguished Educator Fellow, NASA Office of Education, Headquarters and Goddard...
Albert Kang | Photosynthetic Antenna Research Center
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973ManagedStrategic| National Nuclear SecurityAlbert Kang
adolf kussmaul distinguished: Topics by E-print Network
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Distinguished Aragone Rachel Distinguished Ard Sheri M Distinguished Louise Distinguished Campbell Christopher Warren Distinguished Campbell Samantha Lyn Distinguished Carson...
apcs distinguishes hiv-1: Topics by E-print Network
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Distinguished Aragone Rachel Distinguished Ard Sheri M Distinguished Louise Distinguished Campbell Christopher Warren Distinguished Campbell Samantha Lyn Distinguished Carson...
Pafnuty Chebyshev, Steam Engines, and Polynomials by John Albert
Albert, John
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
Einstein , Ricci soliton , ...
Tamaru, Hiroshi
( ) 2012 2012/09/14 #12;1 1.1 : , , . #12;1.2 (Â§2) 1 , , ... (Â§3) Einstein , Ricci.1 : " " . : " " section : (3pp) Einstein (3pp) Ricci soliton (3pp) #12;3.2 (1/3) - : G : La : G G : g ag . : G ( ). #12;3.5 Einstein (1/3) - : (g, , ) : Einstein : c R : Ric = c Â· id (i.e., ric = c , ). : gCH2
Rácz, Zoltán
A Bose-Einstein kondenzációtól az atomlézerig Szépfalusy Péter 1;3 , Csordás András 2 1 ELTE TTK@galahad.elte.hu, csordas@power.szfki.kfki.hu Kivonat A Bose-Einstein (BE) kondenzáció témaköre történetének össze Planck 1900-ban felállított formuláját az eloszlás- függvényre. Bose statisztikáját Einstein
.1October 8, 2005Copyright Albert R. Meyer, 2005. All rights reserved. Planar Graphs
Goldwasser, Shafi
.1October 8, 2005Copyright Â© Albert R. Meyer, 2005. All rights reserved. Drawing Planar Graphs Mathematics for Computer Science MIT 6.042J/18.062J #12;.2October 8, 2005Copyright Â© Albert R. Meyer, 2005 edges crossing. #12;.3October 8, 2005Copyright Â© Albert R. Meyer, 2005. All rights reserved. Planar
Bose-Einstein KondensateBose-Einstein Kondensate W. Ketterle
Blatt, Rainer
Bose-Einstein KondensateBose-Einstein Kondensate © W. Ketterle #12;Der Weg zum BECDer Weg zum BEC? Verdampfungskühlung: http://www.colorado.edu/physics/2000/bec/evap_cool.html #12;Bose-Einstein KondensationBose-Einstein Kondensation Erzeugung eines BEC durch Verdampfungskühlung in Magnetfalle Film: © W. Ketterle, MIT Bose-Einstein
Yates, Andrew
and SAFETY UNIVERSITY ACCIDENT and INJURY REDUCTION CAMPAIGN "AVOIDING SLIPS, TRIPS and FALLS" Dear and injuries we would like to provide some information on Slip, Trip and Fall Prevention. The top ten things that can lead to a slip, trip and fall in the workplace are: 1. Contaminants on the floor such as water
Yates, Andrew
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
BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION Albert Ali Salah
BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION by Albert Ali Salah B.S, in Computer Engineering, Bogazi of Doctor of Philosophy Graduate Program in BogaziÂ¸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
Teaching Bayes' Rule: A Data Oriented Jim Albert 1
Albert, James H.
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
The Homerun Hitting of Mike Schmidt Jim Albert 1
Albert, James H.
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
A novel hybrid carbon material ALBERT G. NASIBULIN1
.2007.37 Both fullerenes and single-walled carbon nanotubes (SWNTs) exhibit many advantageous properties functionalization), we varied the reactor temperature and the concentrations of water vapour and carbon dioxide (seeA novel hybrid carbon material ALBERT G. NASIBULIN1 , PETER V. PIKHITSA2 , HUA JIANG3 , DAVID P
M. C. Werner; J. An; N. W. Evans
2008-07-30T23:59:59.000Z
A number of recent surveys for gravitational lenses have found examples of double Einstein rings. Here, we investigate analytically the occurrence of multiple Einstein rings. We prove, under very general assumptions, that at most one Einstein ring can arise from a mass distribution in a single plane lensing a single background source. Two or more Einstein rings can therefore only occur in multi-plane lensing. Surprisingly, we show that it is possible for a single source to produce more than one Einstein ring. If two point masses (or two isothermal spheres) in different planes are aligned with observer and source on the optical axis, we show that there are up to three Einstein rings. We also discuss the image morphologies for these two models if axisymmetry is broken, and give the first instances of magnification invariants in the case of two lens planes.
Domingos Soares
2012-03-26T23:59:59.000Z
Einstein's static model is the first relativistic cosmological model. The model is static, finite and of spherical spatial symmetry. I use the solution of Einstein's field equations in a homogeneous and isotropic universe -- Friedmann's equation -- to calculate the radius of curvature of the model (also known as "Einstein's universe"). Furthermore, I show, using a Newtonian analogy, the model's mostly known feature, namely, its instability under small perturbations on the state of equilibrium.
Virendra Singh
2005-10-24T23:59:59.000Z
We review here the main contributions of Einstein to the quantum theory. To put them in perspective we first give an account of Physics as it was before him. It is followed by a brief account of the problem of black body radiation which provided the context for Planck to introduce the idea of quantum. Einstein's revolutionary paper of 1905 on light-quantum hypothesis is then described as well as an application of this idea to the photoelectric effect. We next take up a discussion of Einstein's other contributions to old quantum theory. These include (i) his theory of specific heat of solids, which was the first application of quantum theory to matter, (ii) his discovery of wave-particle duality for light and (iii) Einstein's A and B coefficients relating to the probabilities of emission and absorption of light by atomic systems and his discovery of radiation stimulated emission of light which provides the basis for laser action. We then describe Einstein's contribution to quantum statistics viz Bose-Einstein Statistics and his prediction of Bose-Einstein condensation of a boson gas. Einstein played a pivotal role in the discovery of Quantum mechanics and this is briefly mentioned. After 1925 Einstein's contributed mainly to the foundations of Quantum Mechanics. We choose to discuss here (i) his Ensemble (or Statistical) Interpretation of Quantum Mechanics and (ii) the discovery of Einstein-Podolsky-Rosen (EPR) correlations and the EPR theorem on the conflict between Einstein-Locality and the completeness of the formalism of Quantum Mechanics. We end with some comments on later developments.
Piccioni, Robert
2010-10-05T23:59:59.000Z
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
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.
Einstein, Black Holes Gravitational Waves
Cook, Greg
1 #12;Einstein, Black Holes and Gravitational Waves Gregory B. Cook Wake Forest University 2 #12;Einstein's Miraculous Year: 1905 · Einstein, A. "¨Uber einen die Erzeugung und Verwandlung des Lichtes Concerning the Production and Transformation of Light. · Einstein, A. "¨Uber die von der molekularkinetischen
Einstein homogeneous riemannian fibrations
Araujo, Fatima
2008-01-01T23:59:59.000Z
This thesis is dedicated to the study of the existence of homogeneous Einstein metrics on the total space of homogeneous fibrations such that the fibers are totally geodesic manifolds. We obtain the Ricci curvature of ...
Almost Einstein and Poincare-Einstein manifolds in Riemannian signature
A. Rod Gover
2008-03-25T23:59:59.000Z
An almost Einstein manifold satisfies equations which are a slight weakening of the Einstein equations; Einstein metrics, Poincare-Einstein metrics, and compactifications of certain Ricci-flat asymptotically locally Euclidean structures are special cases. The governing equation is a conformally invariant overdetermined PDE on a function. Away from the zeros of this the almost Einstein structure is Einstein, while the zero set gives a scale singularity set which may be viewed as a conformal infinity for the Einstein metric. In this article we give a classification of the possible scale singularity spaces and derive geometric results which explicitly relate the intrinsic conformal geometry of these to the conformal structure of the ambient almost Einstein manifold. Classes of examples are constructed. A compatible generalisation of the constant scalar curvature condition is also developed. This includes almost Einstein as a special case, and when its curvature is suitably negative, is closely linked to the notion of an asymptotically hyperbolic structure.
Einstein's Theory of Relativity In algebra veritas!
Einstein's Theory of Relativity In algebra veritas! d) Einstein's Theory of Relativity, complete! If Einstein is correct (and having conducted many experiments using high-precision clocks
analysis distinguishes phases: Topics by E-print Network
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Lauren Ruth Distinguished Brooks Laura E Distinguished Brown Kyle R Distinguished Brown Leland D Distinguished Brown Lindsay Jane Kasman, Alex 18 Image analysis characterizes...
apomucin phenotype distinguishes: Topics by E-print Network
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Lauren Ruth Distinguished Brooks Laura E Distinguished Brown Kyle R Distinguished Brown Leland D Distinguished Brown Lindsay Jane Kasman, Alex 15 2009 Fall : Highly...
allozyme markers distinguishing: Topics by E-print Network
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Lauren Ruth Distinguished Brooks Laura E Distinguished Brown Kyle R Distinguished Brown Leland D Distinguished Brown Lindsay Jane Kasman, Alex 16 Character displacement in...
Albert City, Iowa: Energy Resources | Open Energy Information
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEEAisin Seikiand TelephoneAlbemarle County, Virginia:Albert
Einstein manifolds with skew torsion
Ilka Agricola; Ana Cristina Ferreira
2013-02-15T23:59:59.000Z
This paper is devoted to the first systematic investigation of manifolds that are Einstein for a connection with skew symmetric torsion. We derive the Einstein equation from a variational principle and prove that, for parallel torsion, any Einstein manifold with skew torsion has constant scalar curvature; and if it is complete of positive scalar curvature, it is necessarily compact and it has finite first fundamental group. The longest part of the paper is devoted to the systematic construction of large families of examples. We discuss when a Riemannian Einstein manifold can be Einstein with skew torsion. We give examples of almost Hermitian, almost metric contact, and G2 manifolds that are Einstein with skew torsion. For example, we prove that any Einstein-Sasaki manifold and any 7-dimensional 3-Sasakian manifolds admit deformations into an Einstein metric with parallel skew torsion.
Evangelos Chaliasos
2006-11-12T23:59:59.000Z
As we know, from the Einstein equations the vanishing of the four-divergence of the energy-momentum tensor follows. This is the case because the four-divergence of the Einstein tensor vanishes identically. Inversely, we find that from the vanishing of the four-divergence of the energy-momentum tensor not only the Einstein equations follow. Besides, the so-named anti-Einstein equations follow. These equations must be considered as complementary to the Einstein equations. And while from the Einstein equations the energy density (or the pressure) can be found, from the anti-Einstein equations the pressure (or the energy density) can be also found, without having to use an additional (but arbitrary) equation of state.
T. Damour
1994-12-21T23:59:59.000Z
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.
PERSPECTIVE Assessing the robustness of networks of spatial genetic Eva M. Albert,1
Fortuna, Miguel A.
. 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
West Indian mammals from the Albert Schwartz Collection: Biological and historical information
Timm, Robert M.; Genoways, Hugh H.
2003-06-01T23:59:59.000Z
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 ...
Einstein-Aether Theory With and Without Einstein
Boris Hikin
2010-03-28T23:59:59.000Z
The exact static spherically symmetric solutions for pure-aether theory and Einstein-aether theory are presented. It is shown that both theories can deliver the Schwarzschild metric, but only the Einstein-aether theory contains solutions with "almost-Schwarzschild" metrics that satisfy Einstein's experiments. Two specific solutions are of special interest: one in pure-aether theory that derives the attractive nature of gravitation as a result of Minskowski signature of the metric, and one - the Jacobson solution- of Einstein-aether theory with "almost-Schwarzschild" metric and non-zero Ricci tensor.
Tomé wins Distinguished Scientist, Engineer Award
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ScientistEngineer Award Tom wins Distinguished Scientist, Engineer Award The Minerals, Metals & Materials Society recognized Tom for his "long lasting contribution to...
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...
Argonne Distinguished Fellows | Argonne National Laboratory
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Argonne Distinguished Fellows Argonne's world-class scientists have achieved national and international recognition, including: Three Nobel Prizes, 119 R&D 100 Awards, More than...
MICHIGAN STATE UNIVERSITY DISTINGUISHED ALUMNI AWARD
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
Damour, Thibault
Si Einstein m'était conté Regard sur la rela5vité et le temps Thibault Damour (IHÉS) #12;· EINSTEIN scien5fique, mari, père, ami, amant, musicien, juif, sioniste, homme engagé, navigateur, ... · EINSTEIN et la joie de
The Einstein - Lorentz Dispute Revisited
Roger Ellman
2007-12-02T23:59:59.000Z
Lorentz [of the Lorentz transforms and Lorentz contractions fame] contended against Einstein that there had to be a medium in which electro-magnetic waves exist and propagate, and that that would of necessity be an absolute frame of reference for the universe. Einstein won that dispute contending that electro-magnetic waves needed no medium and that there was no absolute frame of reference. But, that victory was in a conflict of the Lorentz opinion opposed to the Einstein opinion combined with the substantial other successes and reputation or Einstein. It was not a victory of solid reasoning nor demonstrated factual evidence. Now solid reasoning and new data not available to Einstein and Lorentz show that Lorentz was correct and that Einstein's Theory of Relativity should correctly be termed Einstein's Principle of Invariance. It is shown that Einstein's comprehensive relativity and denial of an absolute frame of reference for the universe are incorrect and that the universe has an absolute universal prime frame of reference. The significance of this correction in its relation to the interaction of science and society is then presented.
Unified field theories and Einstein
S C Tiwari
2006-02-16T23:59:59.000Z
Einstein's contribution to relativity is reviewed. It is pointed out that Weyl gave first unified theory of gravitation and electromagnetism and it was different than the five dimensional theory of Kaluza. Einstein began his work on unification in 1925 that continued whole through the rest of his life.
`Access' report......................... 2 Distinguished lecture............. 3
Minnesota, University of
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
Einstein's unpublished opening lecture for his course on relativity theory in Argentina, 1925
Alejandro Gangui; Eduardo L. Ortiz
2009-03-11T23:59:59.000Z
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].
Atwater, Harry
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
Einstein's Special Relativity: The Hyperbolic Geometric Viewpoint
Abraham A. Ungar
2013-02-27T23:59:59.000Z
The analytic hyperbolic geometric viewpoint of Einstein's special theory of relativity is presented.
SDJS: Efficient Statistics in Wireless Networks Albert Krohn, Michael Beigl, Sabin Wendhack
Beigl, Michael
- width and therefore as well energy in frequently chang- ing environments with many network nodes. OneSDJS: Efficient Statistics in Wireless Networks Albert Krohn, Michael Beigl, Sabin Wendhack Jam Signalling (SDJS) is a new transmission scheme targeted to highly mobile and ad hoc wireless
Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey
Levi, Albert
Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey Tel : + 90 (216) 483 and Natural Sciences, Sabanci University, Istanbul, Turkey 2002 Â 2007 Assistant Prof. of Computer Science and Engineering, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey 1999 Â2002 Post
Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey
Levi, Albert
Albert Levi, Ph.D. Sabanci University, Orhanli, Tuzla, Istanbul 34956, Turkey Tel : + 90 (216) 483 and Natural Sciences, Sabanci University, Istanbul, Turkey 2002 Â 2007 Assistant Prof. of Computer Science and Engineering, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey 2001 Â 2002
Clean and highly ordered graphene synthesized in the gas phase Albert Dato,*a
Frenklach, Michael
Clean and highly ordered graphene synthesized in the gas phase Albert Dato,*a Zonghoon Lee,*b Kith August 2009 DOI: 10.1039/b911395a We report that the substrate-free gas-phase graphene synthesis method produces clean and highly ordered graphene sheets that are similar in quality to the graphene
An Econometrics Analysis of Freight Rail Demand Growth in Albert Wijeweera a, *
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
Completely distinguishable projections of spatial graphs
Nikkuni, Ryo
. 1.1. We can obtain the eight spatial embeddings g1, g2, . . . , g8 of G from ^f as illustrated 2 3 4 5 6 g1 g2 g3 g4 g5 g6 g7 g8 Fig. 1.2. 2 #12;2. Completely distinguishable projections
Conditional quantum distinguishability and pure quantum communication
Tian-Hai Zeng
2005-09-14T23:59:59.000Z
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.
Distinguished Lecturer Series Understanding Climate Change
California at Davis, University of
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
Soil Properties That Distinguish Ecological Sites
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
Final Report Distinguished Speaker Program (DSP) and
Zhou, Chongwu
Final Report Distinguished Speaker Program (DSP) and Annual Technology Workshop (ATW) VSoE Research the academia, government and the industry to USC. We also expect to hold our Annual Technology Workshop (ATW) in 20012, ATW will help put USC on the map associated with excellence in Geothermal Technology research
Four-Photon (In)Distinguishability Transition
Malte C. Tichy; Hyang-Tag Lim; Young-Sik Ra; Florian Mintert; Yoon-Ho Kim; Andreas Buchleitner
2011-03-14T23:59:59.000Z
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.
Abell Endowment Distinguished Lecture in Computer Engineering,
Abell Endowment Distinguished Lecture in Computer Engineering, in conjunction with the Electrical and Computer Engineering Seminar Series and the Computer Science Department Seminar Series "Parallex: An Innovative Execution Model for Exascale Computing" by Thomas Sterling, Ph.D Professor, School of Informatics
Einstein's theory of wavefronts versus Einstein's relativity of simultaneity
Dr Yves Pierseaux
2006-06-27T23:59:59.000Z
The relativity of simultaneity implies that the image of a Lorentz transformed (LT) spherical (circular) wavefront is not a spherical (circular) wavefront (Einstein 1905) but an ellipsoidal (elliptical) wavefront (Moreau, Am.J.of Phys).We show firstly that the relativity of simultaneity leads to the consequence that the image of a Lorentz transformed plane wavefront is a tangent plane to an ellipsoid and not a tangent plane to a sphere (Einstein 1905). We deduce then a longitudinal component of the tangent vector to Poincare's ellipse which is directly connected to the relativity of simultaneity. We suggest finally that this violation of relativity of simultaneity is related to Einstein's implicit choice of the (non relativistic) transverse gauge in his theory of (rigid) wavefronts.
Demonstrating mesoscopic superpositions in double-well Bose-Einstein condensates
T. J. Haigh; A. J. Ferris; M. K. Olsen
2009-07-08T23:59:59.000Z
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.
20 EINSTEIN : SPRING/SUMMER 2013 Major victories are likely as Einstein researchers
Yates, Andrew
20 EINSTEIN : SPRING/SUMMER 2013 Major victories are likely as Einstein researchers attack 1921 and has proven notoriously inconsistent in protecting against TB. At Einstein, home to one teams of Einstein scientists are working on novel TB vaccines that may one day replace the BCG vac- cine
The Einstein Fellowship 2014 Awarded by the Einstein Forum and the Daimler and Benz Foundation
Heermann, Dieter W.
The Einstein Fellowship 2014 Awarded by the Einstein Forum and the Daimler and Benz Foundation The Einstein Forum and the Daimler and Benz Foundation are offering a fellowship for outstanding young thinkers Einstein. The fellowship includes living accommodations for five to six months in the garden cottage
LOCC Distinguishable Unentangled Orthonormal Bases are Generic
Jiri Lebl; Asif Shakeel; Nolan Wallach
2015-02-23T23:59:59.000Z
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.
Homogeneous Einstein metrics on SU(n)
Abid H. Mujtaba
2011-10-10T23:59:59.000Z
It is known that every compact simple Lie group admits a bi-invariant homogeneous Einstein metric. In this paper we use two ansatz to probe the existence of additional inequivalent Einstein metrics on the Lie group SU (n) for arbitrary n. We provide an explicit construction of (2k+1) inequivalent Einstein metrics on SU (2k) and 2k inequivalent Einstein metrics on SU (2k + 1).
Einstein e os Bilogos Gisele A. Oda
Ribas, Roberto Vicençotto
Einstein e os Biólogos Gisele A. Oda Pós-doutoranda do Departamento de Física Aplicada (Bifusp 06/05/2005) Neste ano dedicado à divulgação da obra de Einstein, vale a pena conhecer fatos menos famosos mas, ainda". No mesmo livro, relata também o encontro entre Einstein e Karl Von Frisch(**), da forma como ele o
Einstein Metrics on Rational Homology 7-Spheres
Einstein Metrics on Rational Homology 7-Spheres Charles P. Boyer Krzysztof Galicki Michael Nakamaye Abstract: In this paper we demonstrate the existence of Sasakian-Einstein structures on certain 2-connected rational homology 7-spheres. These appear to be the #12;rst non-regular examples of Sasakian-Einstein
Damour, Thibault
Si Einstein m'était conté Regard sur la rela5vité et le temps Jeudi 31 janvier 2013 Gif-sur-YveBe Thibault Damour (IHÉS) #12;· EINSTEIN, navigateur, ... · EINSTEIN et la joie de la pensée « ce qui est essen0el
Distinguishing quantum and classical transport through nanostructures
Neill Lambert; Clive Emary; Yueh-Nan Chen; Franco Nori
2010-08-23T23:59:59.000Z
We consider the question of how to distinguish quantum from classical transport through nanostructures. To address this issue we have derived two inequalities for temporal correlations in nonequilibrium transport in nanostructures weakly coupled to leads. The first inequality concerns local charge measurements and is of general validity; the second concerns the current flow through the device and is relevant for double quantum dots. Violation of either of these inequalities indicates that physics beyond that of a classical Markovian model is occurring in the nanostructure.
Polymer Bose--Einstein Condensates
E. Castellanos; G. Chacon-Acosta
2013-01-22T23:59:59.000Z
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.
(Pseudo)Generalized Kaluza-Klein G-Spaces and Einstein Equations
C. M. Arcus; E. Peyghan
2014-06-14T23:59:59.000Z
Introducing the Lie algebroid generalized tangent bundle of a Kaluza-Klein bundle, we develop the theory of general distinguished linear connections for this space. In particular, using the Lie algebroid generalized tangent bundle of the Kaluza-Klein vector bundle, we present the $\\left( g,h\\right) $-lift of a curve on the base $M$ and we characterize the horizontal and vertical parallelism of the $\\left( g,h\\right) $-lift of accelerations with respect to a distinguished linear $\\left( \\rho ,\\eta \\right) $-connection. Moreover, we study the torsion, curvature and Ricci tensor field associated to a distinguished linear $\\left( \\rho ,\\eta \\right) $-connection and we obtain the identities of Cartan and Bianchi type in the general framework of the Lie algebroid generalized tangent bundle of a Kaluza-Klein bundle. Finally, we introduce the theory of (pseudo) generalized Kaluza-Klein G-spaces and we develop the Einstein equations in this general framework.
California Policy Should Distinguish Biofuels by Differential Global Warming Effects
Kammen, Daniel M.
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
Using Distinguishing and UIO Sequences Together in a Checking Sequence
Yanikoglu, Berrin
Using Distinguishing and UIO Sequences Together in a Checking Sequence M. Cihan Yalcin1 and Husnu Abstract. If a finite state machine M does not have a distinguishing sequence, but has UIO sequences for its states, there are methods to produce a checking sequence for M. However, if M has a distinguishing
Cumulants, coherence, and contamination in multiparticle Bose-Einstein interferometry
Cramer, J.G.; Kadija, K. [Max-Planck-Institut fuer Physik, Muenchen, Germany Department of Physics FM--15, University of Washington, Seattle, Washington 98195 (United States)] [Max-Planck-Institut fuer Physik, Muenchen, Germany Department of Physics FM--15, University of Washington, Seattle, Washington 98195 (United States)
1996-02-01T23:59:59.000Z
We examine the formalism of multiparticle correlations used in Bose-Einstein interferometry with pions produced in ultrarelativistic heavy ion collisions. We include incoherent and quantum optics coherent contributions as well as the effect of contamination from particles included in the correlation that are not pions. We give expressions for the correlation functions and normalized cumulants for orders 2{endash}5 in the presence of these effects. We show that in the presence of coherence the normalized cumulants include an additional contribution besides that usually called the {open_quote}{open_quote}true{close_quote}{close_quote} multiparticle correlation. We also consider the {ital Q}=0 intercepts of the correlation functions and normalized cumulants in the presence of coherence and of contamination and show that values of the intercept of the normalized cumulant as a function of order can distinguish these two effects. {copyright} {ital 1996 The American Physical Society.}
Einstein-Hessian barriers on convex cones
2012-05-21T23:59:59.000Z
Einstein-Hessian barriers on convex cones. Roland Hildebrand ?. May 21, 2012. Abstract. On the interior of a regular convex cone K ? Rn there exist two ...
A Cosmic Vision Beyond Einstein
Eric V. Linder
2008-10-09T23:59:59.000Z
The acceleration of the cosmic expansion is a fundamental challenge to standard models of particle physics and cosmology. The new physics of dark energy may lie in the nature of gravity, the quantum vacuum, or extra dimensions. I give a brief overview of the puzzles and possibilities of dark energy, and discuss the confrontation of a wide variety of "beyond Einstein" models with the latest data, showing what we currently know and what we must seek to learn. Next generation experiments using a variety of cosmological probes will deeply explore dark energy, dark matter, and gravitation.
Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model
Chassin, David P.; Posse, Christian
2005-09-15T23:59:59.000Z
The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabási-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using other methods and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.
Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model
David P. Chassin; Christian Posse
2005-03-11T23:59:59.000Z
The reliability of electric transmission systems is examined using a scale-free model of network structure and failure propagation. The topologies of the North American eastern and western electric networks are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power system reliability analysis methods, and they suggest that scale-free network models are useful for estimating aggregate electric network reliability.
Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model
Chassin, David P.; Posse, Christian
2005-09-15T23:59:59.000Z
The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power engineering methods, and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.
Bose-Einstein condensate strings
Tiberiu Harko; Matthew J. Lake
2015-01-17T23:59:59.000Z
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.
Einstein Product Metrics in Diverse Dimensions
K. R. Koehler
2006-01-27T23:59:59.000Z
We use direct products of Einstein Metrics to construct new solutions to Einstein's Equations with cosmological constant. We illustrate the technique with three families of solutions having the geometries Kerr/de Sitter X de Sitter, Kerr/anti-de Sitter X anti-de Sitter and Kerr X Kerr.
Experimental studies of Bose-Einstein condensation
Hart, Gus
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
Exact Vacuum Solutions to the Einstein Equation
Ying-Qiu Gu
2007-06-17T23:59:59.000Z
In this paper, we present a framework for getting a series of exact vacuum solutions to the Einstein equation. This procedure of resolution is based on a canonical form of the metric. According to this procedure, the Einstein equation can be reduced to some 2-dimensional Laplace-like equations or rotation and divergence equations, which are much convenient for the resolution.
LDRD 149045 final report distinguishing documents.
Mitchell, Scott A.
2010-09-01T23:59:59.000Z
This LDRD 149045 final report describes work that Sandians Scott A. Mitchell, Randall Laviolette, Shawn Martin, Warren Davis, Cindy Philips and Danny Dunlavy performed in 2010. Prof. Afra Zomorodian provided insight. This was a small late-start LDRD. Several other ongoing efforts were leveraged, including the Networks Grand Challenge LDRD, and the Computational Topology CSRF project, and the some of the leveraged work is described here. We proposed a sentence mining technique that exploited both the distribution and the order of parts-of-speech (POS) in sentences in English language documents. The ultimate goal was to be able to discover 'call-to-action' framing documents hidden within a corpus of mostly expository documents, even if the documents were all on the same topic and used the same vocabulary. Using POS was novel. We also took a novel approach to analyzing POS. We used the hypothesis that English follows a dynamical system and the POS are trajectories from one state to another. We analyzed the sequences of POS using support vector machines and the cycles of POS using computational homology. We discovered that the POS were a very weak signal and did not support our hypothesis well. Our original goal appeared to be unobtainable with our original approach. We turned our attention to study an aspect of a more traditional approach to distinguishing documents. Latent Dirichlet Allocation (LDA) turns documents into bags-of-words then into mixture-model points. A distance function is used to cluster groups of points to discover relatedness between documents. We performed a geometric and algebraic analysis of the most popular distance functions and made some significant and surprising discoveries, described in a separate technical report.
Sandia Energy - Two CRF Papers Named "Distinguished" for 34th...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
CRF Papers Named "Distinguished" for 34th International Symposium on Combustion Home Energy Transportation Energy CRF Facilities Partnership News News & Events Research &...
distinguishing schemes and tasks in children's development of ...
Pedro Gomez
2013-03-27T23:59:59.000Z
ty triggered to accomplish that goal, and a result expected to follow the activity. Tzur et al. (Tzur & Lambert, 2011; Tzur & Simon, 2004) further distinguished.
Generic Off--Diagonal Solutions and Solitonic Hierarchies in Einstein and Modified Gravity
Sergiu I. Vacaru
2015-03-04T23:59:59.000Z
We summarize some our recent results on encoding exact solutions of field equations in Einstein and modified gravity theories into solitonic hierarchies derived for nonholonomic curve flows with associated bi-Hamilton structure. We argue that there is a canonical distinguished connection for which the fundamental geometric/ physical equations decouple in general form. This allows us to construct very general classes of generic off-diagonal solutions determined by corresponding types of generating and integration functions depending on all (spacetime) coordinates. If the integral varieties are constrained to zero torsion configurations, we can extract solutions for the general relativity theory. We conclude that the geometric and physical data for various classes of effective/modified Einstein spaces can be encoded into multi-component versions of the sine-Gordon, or modified Korteweg - de Vries equations.
Al Hanbali, Ahmad
1 Islanded house operation using a micro CHP Albert Molderink, Vincent Bakker, Johann L. Hurink, The Netherlands email: a.molderink@utwente.nl Abstract-- The ÂµCHP is expected as the successor of the conventional. A ÂµCHP appliance saves money and reduces greenhouse gas emission. An additional functionality of the ÂµCHP
Ron, Amos
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
Liblit, Ben
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
United States Department of the Interior, J. A. Kru , Secretary Fish and Wildlife Service, Albert 1 ·.·.·.·....·..... Wet Reduction Equipment······ Continuous Cooker······· Continuous Press ········ Oil Recovery by Centrifuges··········· Direct-Heat Drier···.··· Steam-Tube Drier········ 2 3 3 5 5 6 6 Pap: Wet Reduction
Beigl, Michael
a closer look into the typical use of the above men- tioned sensor network in nowadays, activityµParts: Low Cost Sensor Networks at Scale Michael Beigl, Christian Decker, Albert Krohn, Till}@teco.edu ABSTRACT This paper presents the µPart wireless sensor system espe- cially designed for settings requiring
NOMINATION FORM 2010 Distinguished Texan in Agriculture Award
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
Call for Nominations Women's Faculty Caucus Distinguished Mentor Award
Dyer, Bill
Call for Nominations Women's Faculty Caucus Distinguished Mentor Award The Montana State University Distinguished Mentor Award. This award is intended to recognize extraordinary efforts in mentoring women faculty faculty members. Purpose Successful mentoring is a crucial dimension of developing and retaining faculty
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
Checking Sequence Construction Using Adaptive and Preset Distinguishing Sequences
Jourdan, Guy-Vincent
Checking Sequence Construction Using Adaptive and Preset Distinguishing Sequences Robert M. Hierons of a preset dis- tinguishing sequence for constructing checking sequences. It has been shown that an adaptive distinguishing sequence is sufficient for these methods. This result is significant because adaptive
Einstein Algebras and the Hole Argument JONATHAN BAIN
Aronov, Boris
1 Einstein Algebras and the Hole Argument JONATHAN BAIN Department of Humanities and Social@duke.poly.edu word count: 5498 #12;2 word count: 5498 Einstein Algebras and the Hole Argument ABSTRACT. Einstein. In particular, I suggest that a gauge-invariant interpretation of Einstein algebras that avoids the hole
Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki
Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki Abstract. We show that every KÂcontact Einstein manifold is SasakianÂEinstein and discuss several corollaries of this result. 1 types of Riemannian contact manifolds to construct Einstein metrics of positive scalar curvature
Tanja Rindler-Daller; Paul R. Shapiro
2014-04-17T23:59:59.000Z
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.
Roald Sosnovskiy
2009-01-16T23:59:59.000Z
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.
Quantum reflection of Bose-Einstein Condensates
Pasquini, Thomas A., Jr
2007-01-01T23:59:59.000Z
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 ...
Causality in scalar-Einstein waves
Mark D. Roberts
2015-03-13T23:59:59.000Z
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.
Coherent decay of Bose-Einstein condensates
Cragg, George E. (George Edwin), 1972-
2006-01-01T23:59:59.000Z
As the coldest form of matter known to exist, atomic Bose-Einstein condensates are unique forms of matter where the constituent atoms lose their individual identities, becoming absorbed into the cloud as a whole. Effectively, ...
Einstein's Apple: His First Principle of Equivalence
Engelbert L. Schucking; Eugene J. Surowitz
2012-08-09T23:59:59.000Z
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.
Einstein's Biggest Blunder: A Cosmic Mystery Story
Lawrence Krauss
2010-09-01T23:59:59.000Z
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.
QPOs: Einstein's gravity non-linear resonances
Paola Rebusco; Marek A. Abramowicz
2006-01-30T23:59:59.000Z
There is strong evidence that the observed kHz Quasi Periodic Oscillations (QPOs) in the X-ray flux of neutron star and black hole sources in LMXRBs are linked to Einstein's General Relativity. Abramowicz&Klu\\'zniak (2001) suggested a non-linear resonance model to explain the QPOs origin: here we summarize their idea and the development of a mathematical toy-model which begins to throw light on the nature of Einstein's gravity non-linear oscillations.
GuillÃ©n i FÃ bregas, Albert
, 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 GuillÂ´en i F
, 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
Rostock, Universität
Wolter,Lehrstuhl Strömungsmechanik, Universität Rostock Fr. 15.06.2012 10:30 Uhr Offshore Windkraft Niels
Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein condensates
Johannes Kofler; Mandip Singh; Maximilian Ebner; Michael Keller; Mateusz Kotyrba; Anton Zeilinger
2012-09-18T23:59:59.000Z
We propose an experiment which can demonstrate quantum correlations in a physical scenario as discussed in the seminal work of Einstein, Podolsky and Rosen. Momentum-entangled massive particles are produced via the four-wave mixing process of two colliding Bose-Einstein condensates. The particles' quantum correlations can be shown in a double double-slit experiment or via ghost interference.
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
2010 Society of Petroleum Engineers John Franklin Carll Distinguished
Zhou, Chongwu
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
Cerveny, Vlastislav
(Albert Einstein, Gerty and Carl Cori, Jaroslav Heyrovský), and remains an undisputed leader in Czech
Propagating torsion in the Einstein frame
Poplawski, Nikodem J. [Department of Physics, Indiana University, 727 East Third Street, Bloomington, Indiana 47405 (United States)
2006-11-15T23:59:59.000Z
The Einstein-Cartan-Saa theory of torsion modifies the spacetime volume element so that it is compatible with the connection. The condition of connection compatibility gives constraints on torsion, which are also necessary for the consistence of torsion, minimal coupling, and electromagnetic gauge invariance. To solve the problem of positivity of energy associated with the torsionic scalar, we reformulate this theory in the Einstein conformal frame. In the presence of the electromagnetic field, we obtain the Hojman-Rosenbaum-Ryan-Shepley theory of propagating torsion with a different factor in the torsionic kinetic term.
??Rubidium Bose-Einstein condensates in optical lattices
Campbell, Gretchen K. (Gretchen Kathleen)
2007-01-01T23:59:59.000Z
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 ...
Buffer-Gas Cooled Bose-Einstein Condensate
Ketterle, Wolfgang
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 ...
Einstein has dominated his subject more than any other scientist since the advent of mass
Loss, Daniel
Einstein has dominated his subject more than any other scientist since the advent of mass media with Einstein: The Einstein Factor; What Einstein told his barber; Sex, Drugs, Einstein and Elves;... What next? Taken at face value, Einstein's Heroes is a promising title. Might this be a long- overdue homage
August 5, 2009 How Hume and Mach Helped Einstein
1 August 5, 2009 Addendum How Hume and Mach Helped Einstein Find Special Relativity John D. Norton that it overlooked some material that further illuminated Einstein's attitude to David Hume.1 A revealing remark is made in Reiser's biography2 that notes Einstein's early philosophical reading: He approached
Einstein's Photoelectric Effect How ONE electron tells the story of
Deutsch, Josh
Einstein's Photoelectric Effect How ONE electron tells the story of GAZILLION electrons #12;Nov 28: The Photoelectric Effect Hertz (1887) Thompson & Lenard (1897-1902) Photo-electrons are involved Einstein (1905 Material Dependent Intensity Independent #12;Nov 28, 2006 G.-H. Gweon, Physics 10, UCSC 4 Einstein's Theory
Generating Einstein-scalar solutions D C Robinson
Bushnell, Colin J.
Generating Einstein-scalar solutions D C Robinson Mathematics Department King's College London on a recent paper by Dunajski a method of generating solutions of the Einstein-scalar field equations from Einstein metrics is presented. Two spherically symmetric examples are presented. 1 #12;In a recent paper,[1
Einstein's lost frame Rodrigo de Abreu and Vasco Guerra
Guerra, Vasco
Einstein's lost frame Rodrigo de Abreu and Vasco Guerra November 24, 2005 #12;2 #12;Contents 1 Introduction 7 2 Einstein's frame 15 2.1 Space and time . . . . . . . . . . . . . . . . . . . . . . . . . . 15 and Einstein . . . . . . . . . . . . . . . . . . 57 4.2 A formal Galileo transformation
Bose-Einstein Condensation (For the 9th
Bose-Einstein Condensation (For the 9th Edition of the McGraw-Hill Encyclopedia of Science of bosonic particles is cooled below a critical temperature, it condenses into a Bose-Einstein condensate. Bose-Einstein condensation (BEC) is a phase-transition, which does not depend on the specific
Einstein manifolds with convex boundaries JeanMarc Schlenker \\Lambda
Schlenker, Jean-Marc
Einstein manifolds with convex boundaries JeanÂMarc Schlenker \\Lambda February 2, 1999 Abstract Let (M; @M) be a compact m+1Âmanifold with boundary with an Einstein metric g 0 , with ric g0 = \\Gammamg metric on @M . Then any metric close enough to h 0 is induced on @M by an Einstein metric g with ric g
Einstein manifolds with convex boundaries Jean-Marc Schlenker*
Schlenker, Jean-Marc
Einstein manifolds with convex boundaries Jean Let (M, @M) be a compact m+1-manifold with boundary with an Einstein me* *tric g0, with ricg0 be the induced metric on @M. Then any metric close e* *nough to h0 is induced on @M by an Einstein metric g
Einstein relation for reversible diffusions in random environment
Gantert, Nina
Einstein relation for reversible diffusions in random environment N. Gantert P. Mathieu A the Einstein re- lation for this model. It says that the derivative at 0 of the effective velocity under an additional local drift equals the diffusivity of the model without drift. The Einstein rela- tion
EINSTEIN meets MAGRITTE : The Scholar, Terpsichore and the Barfly
Aerts, Diederik
EINSTEIN meets MAGRITTE : The Scholar, Terpsichore and the Barfly Diederik Aerts Center Leo Apostel was performed as opening act during the 'Einstein meets Magritte' conference at the Free University of Brussels, Terpsichore and the barfly", in Einstein meets Magritte: An Interdisciplinary Reflection eds. Aerts, D
Microtraps and Waveguides for Bose-Einstein Condensates
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
Manipulating Bose-Einstein condensates with laser light Shin Inouye
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
Unitary evolution and the distinguishability of quantum states
Sam Morley-Short; Lawrence Rosenfeld; Pieter Kok
2014-09-08T23:59:59.000Z
The study of quantum systems evolving from initial states to distinguishable, orthogonal final states is important for information processing applications such as quantum computing and quantum metrology. However, for most unitary evolutions and initial states the system does not evolve to an orthogonal quantum state. Here, we ask what proportion of quantum states evolves to nearly orthogonal systems as a function of the dimensionality of the Hilbert space of the system, and numerically study the evolution of quantum states in low-dimensional Hilbert spaces. We find that, as well as the speed of dynamical evolution, the level of maximum distinguishability depends critically on the Hamiltonian of the system.
Infrared fixed point in quantum Einstein gravity
S. Nagy; J. Krizsan; K. Sailer
2012-06-28T23:59:59.000Z
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 $\
Dynamics of Bose-Einstein Condensates
Benjamin Schlein
2007-04-05T23:59:59.000Z
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.
On Einstein Algebras and Relativistic Spacetimes
Rosenstock, Sarita; Weatherall, James Owen
2015-01-01T23:59:59.000Z
In this paper, we examine the relationship between general relativity and the theory of Einstein algebras. We show that according to a formal criterion for theoretical equivalence recently proposed by Halvorson (2012, 2015) and Weatherall (2015), the two are equivalent theories.
Bose-Einstein Condensation in Compactified Spaces
Kiyoshi Shiraishi
2012-11-26T23:59:59.000Z
We discuss the thermodynamic potential of a charged Bose gas with the chemical potential in arbitrary dimensions. The critical temperature for Bose-Einstein condensation is investigated. In the case of the compactified background metric, it is shown that the critical temperature depends on the size of the extra spaces. The asymmetry of the "Kaluza-Klein charge" is also discussed.
Chromohydrodynamics in Einstein-Cartan theory
Amorim, R.
1986-05-15T23:59:59.000Z
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.
General proof of entropy principle in Einstein-Maxwell theory
Fang, Xiongjun
2015-01-01T23:59:59.000Z
We consider a static self-gravitating charged perfect fluid system in the Einstein-Maxwell theory. Assume Maxwell's equation and the Einstein constraint equation are satisfied, and the temperature of the fluid obeys Tolman's law. Then we prove that the total entropy of the fluid achieves an extremum implies other components of Einstein's equation for any variations of metric and electrical potential with fixed boundary values. Conversely, if Einstein's equation and Maxwell's equations hold, the total entropy achieves an extremum. Our work suggests that the maximum entropy principle is consistent with Einstein's equation when electric field is taken into account.
Routing for Wireless Multi Hop Networks Unifying and Distinguishing Features
Graham, Nick
-to-end communication, wireless communication provides flexible deployment and use, cost reduction, mobility, network dynamic network conditions due to interference, loss of signal power with distance and freedom of mobilityRouting for Wireless Multi Hop Networks Unifying and Distinguishing Features Technical Report
Confrence de prestige Thermo Thermo Distinguished Lecture Alexander Makarov
Parrott, Lael
Conférence de prestige Thermo Thermo Distinguished Lecture Alexander Makarov Directeur de la recherche Sciences de la vie et spectrométrie de masse Thermo Scientific Jeudi, 6 juin 2013 à 11 débuta ses travaux sur l'analyseur de masse Orbitrap. Suite à l'acquisition de HD Technologies par Thermo
Cardiff University Distinguished Lecture Symposium Advances in Solar Energy
Martin, Ralph R.
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
2011 Robert Stewart Distinguished Lecture ALL SCIENCE IS COMPUTER SCIENCE
Mayfield, John
2011 Robert Stewart Distinguished Lecture ALL SCIENCE IS COMPUTER SCIENCE Alfred Aho, Columbia in the Computer Science Department at Columbia University. He served as Chair of the department from 1995 to 1997.D. in Electrical Engineering/Computer Science from Princeton University. Professor Aho won the Great Teacher Award
Distinguishing between interference and exploitation competition for shelter in a
Jones, Owen
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
Distinguishing between Dirac and Majorana neutrinos withtwo-particle interferometry
Gutierrez, Thomas D.
2006-03-02T23:59:59.000Z
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.
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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
CHANCELLOR'S AWARD FOR DISTINGUISHED CONTRIBUTION TO THE UNIVERSITY
Botea, Adi
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 contribution to Australian science. In 1997, he was elected to Fellowship of the Australian Academy of Science
Brief Genetics Report Distinguishing Covariation From Causation in Diabetes
Yandell, Brian S.
Brief Genetics Report Distinguishing Covariation From Causation in Diabetes A Lesson From-induced diabetes. We found that Pdi mRNA is 20-fold more abundant in the diabetes-susceptible BTBR mouse strain relative to the diabetes-resistant C56BL/6 (B6) strain. A genetic analysis was carried out to determine
Lynn Wecker, PhD Distinguished Professor, Psychiatry and
Meyers, Steven D.
A Addiction Lynn Wecker, PhD Distinguished Professor, Psychiatry and Pharmacology & Molecular of Pediatrics Adolescent Health Carol Bryant, PhD Professor and Co-director Florida Prevention Research Center Professor of Pediatrics Expertise: General adolescent medicine Ellen Daley, PhD Assistant Research Professor
Einstein metrics and Brans-Dicke superfields
Marques, S.
1988-01-01T23:59:59.000Z
It is obtained here a space conformal to the Einstein space-time, making the transition from an internal bosonic space, constructed with the Majorana constant spinors in the Majorana representation, to a bosonic ''superspace,'' through the use of Einstein vierbeins. These spaces are related to a Grassmann space constructed with the Majorana spinors referred to above, where the ''metric'' is a function of internal bosonic coordinates. The conformal function is a scale factor in the zone of gravitational radiation. A conformal function dependent on space-time coordinates can be constructed in that region when we introduce Majorana spinors which are functions of those coordinates. With this we obtain a scalar field of Brans-Dicke type. 11 refs.
Scattering amplitudes in N=2 Maxwell-Einstein and Yang-Mills/Einstein supergravity
Marco Chiodaroli; Murat Gunaydin; Henrik Johansson; Radu Roiban
2015-02-03T23:59:59.000Z
We expose a double-copy structure in the scattering amplitudes of the generic Jordan family of N=2 Maxwell-Einstein and Yang-Mills/Einstein supergravity theories in four and five dimensions. The Maxwell-Einstein supergravity amplitudes are obtained through the color/kinematics duality as a product of two gauge-theory factors; one originating from pure N=2 super-Yang-Mills theory and the other from the dimensional reduction of a bosonic higher-dimensional pure Yang-Mills theory. We identify a specific symplectic frame in four dimensions for which the on-shell fields and amplitudes from the double-copy construction can be identified with the ones obtained from the supergravity Lagrangian and Feynman-rule computations. The Yang-Mills/Einstein supergravity theories are obtained by gauging a compact subgroup of the isometry group of their Maxwell-Einstein counterparts. For the generic Jordan family this process is identified with the introduction of cubic scalar couplings on the bosonic gauge-theory side, which through the double copy are responsible for the non-abelian vector interactions in the supergravity theory. As a demonstration of the power of this structure, we present explicit computations at tree-level and one loop. The double-copy construction allows us to obtain compact expressions for the supergravity superamplitudes which are naturally organized as polynomials in the gauge coupling constant.
Bose-Einstein correlations from "within"
O. V. Utyuzh; G. Wilk; Z. Wlodarczyk
2005-09-28T23:59:59.000Z
We describe an attempt to model numerically Bose-Einstein correlations (BEC) from "within", i.e., by using them as the most fundamental ingredient of some Monte Carlo event generator (MC) rather than considering them as a kind of (more or less important, depending on the actual situation) "afterburner", which inevitably changes original physical content of the MC code used to model multiparticle production process.
Einstein's fluctuation formula. A historical overview
Sandor Varro
2006-11-02T23:59:59.000Z
A historical overview is given on the basic results which appeared by the year 1926 concerning Einstein's fluctuation formula of black-body radiation, in the context of light-quanta and wave-particle duality. On the basis of the original publications (from Planck's derivation of the black-body spectrum and Einstein's introduction of the photons up to the results of Born, Heisenberg and Jordan on the quantization of a continuum) a comparative study is presented on the first line of thoughts that led to the concept of quanta. The nature of the particle-like fluctuations and the wave-like fluctuations are analysed by using several approaches. With the help of the classical probability theory, it is shown that the infinite divisibility of the Bose distribution leads to the new concept of classical poissonian photo-multiplets or to the binary photo-multiplets of fermionic character. As an application, Einstein's fluctuation formula is derived as a sum of fermion type fluctuations of the binary photo-multiplets.
k-Boson Quantum Walks Do Not Distinguish Arbitrary Graphs
Jamie Smith
2010-04-01T23:59:59.000Z
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].
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,...
Distinguishing Off-Shell Supergravities With On-Shell Physics
Neil D. Lambert; Gregory W. Moore
2005-10-04T23:59:59.000Z
We show that it is possible to distinguish between different off-shell completions of supergravity at the on-shell level. We focus on the comparison of the ``new minimal'' formulation of off-shell four-dimensional N=1 supergravity with the ``old minimal'' formulation. We show that there are 3-manifolds which admit supersymmetric compactifications in the new-minimal formulation but which do not admit supersymmetric compactifications in other formulations. Moreover, on manifolds with boundary the new-minimal formulation admits ``singleton modes'' which are absent in other formulations.
Sorin, Daniel J.
1 Lazy Error Detection for Microprocessor Functional Units Mahmut Yilmaz1, Albert Meixner2, Sule and evaluate error detection mechanisms for a microprocessor's func- tional units (FUs), such as adders and multipliers. We want our error detectors to have three fea- tures: negligible impact on microprocessor
, 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
Shih, Albert J.
of the temperature distribution on the cavity wall surface in diesel exhaust aftertreatment filters usingABSTRACT KONG, JIAN. Infrared-Based Temperature Measurement in Ceramics Grinding and Diesel Exhaust Aftertreatment Filters. (Under the direction of Albert J. Shih) Non-contact remote-sensing radiation thermometry
Bose-Einstein Condensate general relativistic stars
P. H. Chavanis; T. Harko
2011-08-19T23:59:59.000Z
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.
Einstein-Yang-Mills-Lorentz Black Holes
Jose A. R. Cembranos; Jorge Gigante Valcarcel
2015-01-28T23:59:59.000Z
Different black hole solutions of the coupled Einstein-Yang-Mills equations are well known from long time. They have attracted much attention from mathematicians and physicists from their discovery. In this work, we analyze black holes associated with the gauge Lorentz group. In particular, we study solutions which identify the gauge connection with the spin connection. This ansatz allows to find exact solutions to the complete system of equations. By using this procedure, we show the equivalence between the Yang-Mills-Lorentz model in curved space-time and a particular set of extended gravitational theories.
Entangled light from Bose-Einstein condensates
H. T. Ng; S. Bose
2008-09-30T23:59:59.000Z
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.
Rydberg excitation of Bose-Einstein condensates
Rolf Heidemann; Ulrich Raitzsch; Vera Bendkowsky; Björn Butscher; Robert Löw; Tilman Pfau
2007-10-30T23:59:59.000Z
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.
Non-commutative Einstein-Proca Space-time
Blanca Gónzales; Román Linares; Marco Maceda; Oscar Sánchez-Santos
2014-09-12T23:59:59.000Z
In this work we present a deformed model of Einstein-Proca space-time based on the replacement of point-like sources by non-commutative smeared distributions. We discuss the solutions to the set of non-commutative Einstein-Proca equations thus obtained, with emphasis on the issue of singularities and horizons.
Static Solutions of Einstein's Equations with Spherical Symmetry
Iftikhar Ahmad; Maqsoom Fatima; Najam-ul-Basat
2014-05-02T23:59:59.000Z
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.
Dynamics of Bose-Einstein Condensates Benjamin Schlein
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 SchrÂ¨odinger equation known as the Gross-Pitaevskii equation for the time evolution of the condensate
DISORDERED BOSE EINSTEIN CONDENSATES WITH INTERACTION IN ONE DIMENSION
Boyer, Edmond
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
Williams Companies Distinguished Chair in Energy Technology Raj Singh will lead
Piao, Daqing
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
Botea, Adi
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
Bose-Einstein Condensates in Superlattices
Mason A. Porter; P. G. Kevrekidis
2005-07-28T23:59:59.000Z
We consider the Gross-Pitaevskii (GP) equation in the presence of periodic and quasiperiodic superlattices to study cigar-shaped Bose-Einstein condensates (BECs) in such potentials. We examine spatially extended wavefunctions in the form of modulated amplitude waves (MAWs). With a coherent structure ansatz, we derive amplitude equations describing the evolution of spatially modulated states of the BEC. We then apply second-order multiple scale perturbation theory to study harmonic resonances with respect to a single lattice wavenumber as well as ultrasubharmonic resonances that result from interactions of both wavenumbers of the superlattice. In each case, we determine the resulting system's equilibria, which represent spatially periodic solutions, and subsequently examine the stability of the corresponding solutions by direct simulations of the GP equation, identifying them as typically stable solutions of the model. We then study subharmonic resonances using Hamiltonian perturbation theory, tracing robust, spatio-temporally periodic patterns.
Energy in the Einstein-Aether Theory
Christopher Eling
2009-12-06T23:59:59.000Z
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.
Bose-Einstein Condensation on Holographic Screens
Mirza, Behrouz; Raissi, Zahra
2011-01-01T23:59:59.000Z
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.
Stability of Einstein Static Universe over Lyra Geometry
F. Darabi; Y. Heydarzade; F. Hajkarim
2014-06-30T23:59:59.000Z
The existence and stability conditions of Einstein static universe against homogeneous scalar perturbations in the context of Lyra geometry is investigated. The stability condition is obtained in terms of the constant equation of state parameter $\\omega=p/\\rho$ depending on energy density $\\rho_0$ and scale factor $a_0$ of the initial Einstein static universe. Also, the stability against vector and tensor perturbations is studied. It is shown that a stable Einstein static universe can be found in the context of Lyra geometry against scalar, vector and tensor perturbations for suitable range and values of physical parameters.
The magnetic dipole interaction in Einstein-Maxwell theory
W. B. Bonnor
2002-03-13T23:59:59.000Z
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.
Back-reaction of Quantum fields in an Einstein Universe
M. B. Altaie
2001-04-30T23:59:59.000Z
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.
More on the dilatonic Einstein-Gauss-Bonnet gravity
Masao Iihoshi
2010-11-16T23:59:59.000Z
Einstein-Gauss-Bonnet gravity coupled to a dynamical dilaton is examined from the viewpoint of Einstein's equivalence principle. We point out that the usual frame change that applies to the action without curvature correction does not cure the problem of nonminimal couplings by the dynamical nature of a dilaton field. Thus a modification of the Einstein frame is required. It is proposed that the kinetic term of a dilaton should be brought to a canonical form, which completely fixes the additional terms associated with the frame transformation.
More on the dilatonic Einstein-Gauss-Bonnet gravity
Iihoshi, Masao
2010-01-01T23:59:59.000Z
Einstein-Gauss-Bonnet gravity coupled to a dynamical dilaton is examined from the viewpoint of Einstein's equivalence principle. We point out that the usual frame change that applies to the action without curvature correction does not cure the problem of nonminimal couplings by the dynamical nature of a dilaton field. Thus a modification of the Einstein frame is required. It is proposed that the kinetic term of a dilaton should be brought to a canonical form, which completely fixes the additional terms associated with the frame transformation.
Bose-Einstein Condensate: A New state of matter KISHORE T. KAPALE
Allen, Roland E.
Bose-Einstein Condensate: A New state of matter KISHORE T. KAPALE June 24, 2003 #12;BOSE-EINSTEIN Statistics Intuitive picture of Bose-Einstein Condensation (BEC) Statistical mechanics of BECs Experimental techniques to achieve BEC. · What can we do with Bose-Einstein condensates? Coherence in the condensates Atom
EINSTEIN METRICS ON RATIONAL HOMOLOGY SPHERES CHARLES P. BOYER AND KRZYSZTOF GALICKI
EINSTEIN METRICS ON RATIONAL HOMOLOGY SPHERES CHARLES P. BOYER AND KRZYSZTOF GALICKI 1. Introduction In this paper we prove the existence of Einstein metrics, actually Sasakian- Einstein metrics is known about the existence of Einstein metrics on rational homology spheres, and the known ones
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS
Yates, Andrew
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS December, 2012 1 Einstein Research Profiles and Grant Funding Searches Einstein Research Profiles (ERP), which://www.experts.scival.com/ einstein/ Innovation in Healthcare Research In late October, the ICTR, along with Cornell, Columbia
Ground states and dynamics of multi-component Bose-Einstein condensates
Markowich, Peter A.
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
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
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.
Distinguishing two kinds of scalar mesons from heavy meson decays
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
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.
Method for distinguishing multiple targets using time-reversal acoustics
Berryman, James G.
2004-06-29T23:59:59.000Z
A method for distinguishing multiple targets using time-reversal acoustics. Time-reversal acoustics uses an iterative process to determine the optimum signal for locating a strongly reflecting target in a cluttered environment. An acoustic array sends a signal into a medium, and then receives the returned/reflected signal. This returned/reflected signal is then time-reversed and sent back into the medium again, and again, until the signal being sent and received is no longer changing. At that point, the array has isolated the largest eigenvalue/eigenvector combination and has effectively determined the location of a single target in the medium (the one that is most strongly reflecting). After the largest eigenvalue/eigenvector combination has been determined, to determine the location of other targets, instead of sending back the same signals, the method sends back these time reversed signals, but half of them will also be reversed in sign. There are various possibilities for choosing which half to do sign reversal. The most obvious choice is to reverse every other one in a linear array, or as in a checkerboard pattern in 2D. Then, a new send/receive, send-time reversed/receive iteration can proceed. Often, the first iteration in this sequence will be close to the desired signal from a second target. In some cases, orthogonalization procedures must be implemented to assure the returned signals are in fact orthogonal to the first eigenvector found.
NONE
1999-09-01T23:59:59.000Z
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.
Radiation Pressure Induced Einstein-Podolsky-Rosen Paradox
V. Giovannetti; S. Mancini; P. Tombesi
2000-05-17T23:59:59.000Z
We demonstrate the appearance of Einstein-Podolsky-Rosen (EPR) paradox when a radiation field impinges on a movable mirror. The, the possibility of a local realism test within a pendular Fabry-Perot cavity is shown to be feasible.
Induced Matter Brane Gravity and Einstein Static Universe
Y. Heydarzade; F. Darabi
2015-04-21T23:59:59.000Z
We investigate stability of the Einstein static universe against the scalar, vector and tensor perturbations in the context of induced matter brane gravity. It is shown that in the framework of this model, the Einstein static universe has a positive spatial curvature. In contrast to the classical general relativity, it is found that a stable Einstein static universe against the scalar perturbations does exist provided that the variation of time dependent geometrical equation of state parameter is proportional to the minus of the variation of the scale factor, $\\delta \\omega_{g}(t)=-C\\delta a(t)$. We obtain neutral stability against the vector perturbations, and the stability against the tensor perturbations is guaranteed due to the positivity of the spatial curvature of the Einstein static universe in induced matter brane gravity.
Bose-Einstein condensates of polaritons: Vortices and superfluidity...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Bose-Einstein condensates of polaritons: Vortices and superfluidity May 10, 2011 at 3:00PM36-428 Benoit Deveaud-Pldran Ecole Polytechnique Fdrale de Lausanne abstract: The...
Breakdown of Stokes-Einstein relation in supercooled water
Pradeep Kumar
2007-02-06T23:59:59.000Z
Water displays breakdown of the Stokes-Einstein relation at low temperatures. We hypothesize that the breakdown is a result of the structural changes and a sharp rise in dynamic heterogeneities that occurs low T upon crossing the Widom line.
Gravitation and Thermodynamics: The Einstein Equation of State Revisited
Jarmo Makela; Ari Peltola
2008-08-19T23:59:59.000Z
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.
Effects of interaction in Bose-Einstein condensates
Xu, Kaiwen
2006-01-01T23:59:59.000Z
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 ...
Realization of Bose-Einstein condensation with Lithium-7 atoms
Yu, Yichao
2014-01-01T23:59:59.000Z
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 ...
Yang, S.-H.
2008-01-01T23:59:59.000Z
1 and C. S. Fadley 2,5,6 BESSY mbH, Albert-Einstein-Str. 15,Association. The beamtime at BESSY was supported by theFlorian Kronast Address: BESSY mbH, Albert-Einstein-Str. 15,
Einstein's Concept of Rationality in Science and Religion
Fleming, Richard
EINSTEIN1S CONCEPT OF RATIONALITY IN SCIENCE AND RELIGION Richard Fleming Historically, science and religion often have been held to be irreconcilable antagonists. Scientific advances and the individual scientist or community of scientists who... of such attacks. Einstein found the historical antagonism between science and religion to be not only socially destructive but philosophically unsound and indefensible as well. In a much quoted phrase he held that "(s)cience without religion is lame, religion...
Einstein's other gravity and the acceleration of the Universe
Linder, Eric V. [Berkeley Lab and University of California, Berkeley, California 94720 (United States); Institute for the Early Universe, Ewha Womans University, Seoul 120-750 (Korea, Republic of)
2010-06-15T23:59:59.000Z
Spacetime curvature plays the primary role in general relativity but Einstein later considered a theory where torsion was the central quantity. Just as the Einstein-Hilbert action in the Ricci curvature scalar R can be generalized to f(R) gravity, we consider extensions of teleparallel, or torsion scalar T, gravity to f(T) theories. The field equations are naturally second order, avoiding pathologies, and can give rise to cosmic acceleration with unique features.
Bose-Einstein condensation of a quantum group gas
Marcelo R. Ubriaco
1997-10-10T23:59:59.000Z
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 $q>3$.
Gravitational dynamics in Bose Einstein condensates
Florian Girelli; Stefano Liberati; Lorenzo Sindoni
2008-12-03T23:59:59.000Z
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.
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
DISSERTATION Electronic structure and transport
Florian, Libisch
Unterschrift #12; ``Gott wË?urfelt nicht!'' ``God does not throw dice!'' Albert Einstein, Solvay conference
Paris-Sud XI, UniversitÃ© de
forte del vapore, dell'elettricitÃ e dell'energia solare: la volontÃ ." Albert Einstein tel-00864002
Pisenti, N.; Gaebler, C. P. E.; Lynn, T. W. [Department of Physics, Harvey Mudd College, 301 Platt Blvd., Claremont, California 91711 (United States)
2011-08-15T23:59:59.000Z
Measuring an entangled state of two particles is crucial to many quantum communication protocols. Yet Bell-state distinguishability using a finite apparatus obeying linear evolution and local measurement is theoretically limited. We extend known bounds for Bell-state distinguishability in one and two variables to the general case of entanglement in n two-state variables. We show that at most 2{sup n+1}-1 classes out of 4{sup n} hyper-Bell states can be distinguished with one copy of the input state. With two copies, complete distinguishability is possible. We present optimal schemes in each case.
Unified N=2 Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Four Dimensions
Günaydin, M; Zagermann, M
2005-01-01T23:59:59.000Z
We study unified N=2 Maxwell-Einstein supergravity theories (MESGTs) and unified Yang-Mills Einstein supergravity theories (YMESGTs) in four dimensions. As their defining property, these theories admit the action of a global or local symmetry group that is (i) simple, and (ii) acts irreducibly on all the vector fields of the theory, including the ``graviphoton''. Restricting ourselves to the theories that originate from five dimensions via dimensional reduction, we find that the generic Jordan family of MESGTs with the scalar manifolds [SU(1,1)/U(1)] X [SO(2,n)/SO(2)X SO(n)] are all unified in four dimensions with the unifying global symmetry group SO(2,n). Of these theories only one can be gauged so as to obtain a unified YMESGT with the gauge group SO(2,1). Three of the four magical supergravity theories defined by simple Euclidean Jordan algebras of degree 3 are unified MESGTs in four dimensions. Two of these can furthermore be gauged so as to obtain 4D unified YMESGTs with gauge groups SO(3,2) and SO(6,2)...
awards solar america: Topics by E-print Network
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Teacher Award, American Society of Metals Einstein Albert Einstein World Award of Science Humboldt Alexander von Humboldt Awards AmAcadMicBio American Rose, Michael R. 7...
Gallery of Distinguished Texans in Agriculture Texas A&M AgriLife
, Jr. Mary Nan West Nominations are currently being accepted for the 2010 Texas A&M Distinguished TexanGallery of Distinguished Texans in Agriculture Texas A&M AgriLife L. Don Anderson John B. Armstrong contributions to Texas agriculture. Nominations may be submitted utilizing the attached nomination form
Einstein static Universe in non-minimal kinetic coupled gravity
K. Atazadeh; F. Darabi
2015-04-18T23:59:59.000Z
We study the stability of Einstein static Universe, with FLRW metric, by considering linear homogeneous perturbations in the kinetic coupled gravity. By taking linear homogeneous perturbations, we find that the stability of Einstein static Universe, in the kinetic coupled gravity with quadratic scalar field potential, for closed ($K=1$) isotropic and homogeneous FLRW Universe depends on the coupling parameters $\\kappa$ and $\\varepsilon$. Specifically, for $\\kappa=L_P^2$ and $\\varepsilon=1$ we find that the stability condition imposes the inequality $a_0>\\sqrt{3}L_P$ on the initial size $a_0$ of the closed Einstein static Universe before the inflation. Such inequality asserts that the initial size of the Einstein static Universe must be greater than the Planck length $L_P$, in consistency with the quantum gravity and quantum cosmology requirements. In this way, we have determined the non-minimal coupling parameter $\\kappa$ in the context of Einstein static Universe. Such a very small parameter is favored in the inflationary models constructed in the kinetic coupled gravity. We have also studied the stability against the vector and tensor perturbations and discussed on the acceptable values of the equation of state parameter.
Large Einstein Radii: A Problem for LambdaCDM
Tom Broadhurst; Rennan Barkana
2008-08-19T23:59:59.000Z
The Einstein radius of a cluster provides a relatively model-independent measure of the mass density of a cluster within a projected radius of ~ 150 kpc, large enough to be relatively unaffected by gas physics. We show that the observed Einstein radii of four well-studied massive clusters, for which reliable virial masses are measured, lie well beyond the predicted distribution of Einstein radii in the standard LambdaCDM model. Based on large samples of numerically simulated cluster-sized objects with virial masses ~ 1e15 solar, the predicted Einstein radii are only 15-25'', a factor of two below the observed Einstein radii of these four clusters. This is because the predicted mass profile is too shallow to exceed the critical surface density for lensing at a sizable projected radius. After carefully accounting for measurement errors as well as the biases inherent in the selection of clusters and the projection of mass measured by lensing, we find that the theoretical predictions are excluded at a 4-sigma significance. Since most of the free parameters of the LambdaCDM model now rest on firm empirical ground, this discrepancy may point to an additional mechanism that promotes the collapse of clusters at an earlier time thereby enhancing their central mass density.
Unified N=2 Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Four Dimensions
M. Gunaydin; S. McReynolds; M. Zagermann
2005-07-22T23:59:59.000Z
We study unified N=2 Maxwell-Einstein supergravity theories (MESGTs) and unified Yang-Mills Einstein supergravity theories (YMESGTs) in four dimensions. As their defining property, these theories admit the action of a global or local symmetry group that is (i) simple, and (ii) acts irreducibly on all the vector fields of the theory, including the ``graviphoton''. Restricting ourselves to the theories that originate from five dimensions via dimensional reduction, we find that the generic Jordan family of MESGTs with the scalar manifolds [SU(1,1)/U(1)] X [SO(2,n)/SO(2)X SO(n)] are all unified in four dimensions with the unifying global symmetry group SO(2,n). Of these theories only one can be gauged so as to obtain a unified YMESGT with the gauge group SO(2,1). Three of the four magical supergravity theories defined by simple Euclidean Jordan algebras of degree 3 are unified MESGTs in four dimensions. Two of these can furthermore be gauged so as to obtain 4D unified YMESGTs with gauge groups SO(3,2) and SO(6,2), respectively. The generic non-Jordan family and the theories whose scalar manifolds are homogeneous but not symmetric do not lead to unified MESGTs in four dimensions. The three infinite families of unified five-dimensional MESGTs defined by simple Lorentzian Jordan algebras, whose scalar manifolds are non-homogeneous, do not lead directly to unified MESGTs in four dimensions under dimensional reduction. However, since their manifolds are non-homogeneous we are not able to completely rule out the existence of symplectic sections in which these theories become unified in four dimensions.
On the Einstein-Cartan cosmology vs. Planck data
Palle, Davor
2014-01-01T23:59:59.000Z
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 negativ...
A Machian Version of Einstein's Variable Speed of Light Theory
Unzicker, Alexander
2015-01-01T23:59:59.000Z
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.
A Machian Version of Einstein's Variable Speed of Light Theory
Alexander Unzicker; Jan Preuss
2015-03-13T23:59:59.000Z
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.
Bose-Einstein Condensation of Pions in High Multiplicity Events
V. V. Begun; M. I. Gorenstein
2007-03-19T23:59:59.000Z
We present microcanonical ensemble calculations of particle number fluctuations in the ideal pion gas approaching Bose-Einstein condensation. In the samples of events with a fixed number of all pions, $N_{\\pi}$, one may observe a prominent signal. When $N_{\\pi}$ increases the scaled variances for particle number fluctuations of both neutral and charged pions increase dramatically in the vicinity of the Bose-Einstein condensation line. As an example, the estimates are presented for $p+p$ collisions at the beam energy of 70 GeV.
All ASD complex and real 4-dimensional Einstein spaces with $?\
Adam Chudecki
2015-02-02T23:59:59.000Z
Anti-self-dual (ASD) 4-dimensional complex Einstein spaces with nonzero cosmological constant $\\Lambda$ equipped with a nonnul Killing vector are considered. It is shown, that any conformally nonflat metric of such spaces can be always brought to a special form and the Einstein field equations can be reduced to the Boyer-Finley-Pleba\\'nski equation (Toda field equation). Some alternative form of the metric are discussed. All possible real slices (neutral, Euclidean and Lorentzian) of ASD complex spaces admitting a nonnull Killing vector are found.
de Sitter group and Einstein-Hilbert Lagrangian
Mahato, Prasanta [Department of Mathematics, Narasinha Dutt College, Howrah, West Bengal, 711 101 (India)
2004-12-15T23:59:59.000Z
Axial-vector torsion in the Einstein-Cartan space U{sub 4} is considered here. By picking a particular term from the SO(4,1) Pontryagin density and then modifying it in a SO(3,1) invariant way, we get a Lagrangian density with Lagrange multipliers. Then considering torsion and torsionless connection as independent fields, it has been found that {kappa} and {lambda} of Einstein-Hilbert Lagrangian, appear as integration constants in such a way that {kappa} has been found to be linked with the topological Nieh-Yan density of U{sub 4} space.
??Rubidium Bose-Einstein condensates : machine construction and quantum Zeno experiments
Streed, Erik William
2006-01-01T23:59:59.000Z
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 ...
Chandan K Mishra; Rajesh Ganapathy
2014-09-29T23:59:59.000Z
We examine the role of shape of dynamical heterogeneities on the validity of the Stokes-Einstein (SE) and Stokes-Einstein-Debye (SED) relations in quasi-two-dimensional suspensions of colloidal ellipsoids. For ellipsoids with repulsive interactions, although the orientational relaxation time remains coupled to the structural one, the SED relation by the Einstein formalism shows a breakdown. Strikingly, we find that it is the change in the shape of the dynamical heterogeneities from string-like to compact and not just their presence that results in the breakdown of both the SE and SED relations. On introducing a short-range depletion attraction between the ellipsoids, associated with the lack of morphological evolution of dynamical heterogeneities, the SE and SED relations remain valid even for deep supercooling. Our observations are consistent with numerical predictions.
Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and Bela Szilagyi
Lindblom, Lee
Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and BeÂ´la SzilaÂ´gyi
EINSTEIN METRICS ON SPHERES CHARLES P. BOYER, KRZYSZTOF GALICKI AND J ANOS KOLLAR
EINSTEIN METRICS ON SPHERES CHARLES P. BOYER, KRZYSZTOF GALICKI AND J Â´ANOS KOLLÂ´AR 1. Introduction and Einstein, that is the Ricci curvature is a constant multiple of the metric. The spheres S4m+3 , m > 1 are known to have another Sp(m + 1)-homogeneous Einstein metric discovered by Jensen [Jen73]. In addi- tion
Einstein relation for biased random walk on GaltonWatson trees Gerard Ben Arous
Boyer, Edmond
Einstein relation for biased random walk on GaltonÂWatson trees Gerard Ben Arous Yueyun Hu Stefano Olla Ofer ZeitouniÂ§ June 19, 2011. Revised November 20, 2011 Abstract We prove the Einstein relation random walks on GaltonÂWatson trees. This provides the first example where the Einstein relation
Einstein/MMC CFAR Awarded Pilot Projects for 2006 Dr. Matthew Anderson, Department of
Yates, Andrew
Einstein/MMC CFAR Awarded Pilot Projects for 2006 PI Title Dr. Matthew Anderson, Department retention of gp160 Einstein/MMC CFAR Awarded Pilot Projects for 2005 PI Title Dr. Carol Harris, Department Einstein/MMC CFAR Awarded Pilot Projects for 2004 PI Title Dr. Laura Santambrogio, Department of Pathology
New Einstein Metrics on 8#(S 2 S 3 ) Charles P. Boyer Krzysztof Galicki
New Einstein Metrics on 8#(S 2 #2; S 3 ) Charles P. Boyer Krzysztof Galicki Abstract: We show that #8(S 2 #2;S 3 ) admits two 8-dimensional complex family of inequiva- lent non-regular Sasakian-Einstein structures. These are the #12;rst known non-regular Sasakian- Einstein metrics on this 5-manifold
Einstein's Clocks, Poincar's Maps: An Interview with Peter Galison, Donald A. Yerxa
Galison, Peter L.
Einstein's Clocks, Poincaré's Maps: An Interview with Peter Galison, Part II Donald A. Yerxa.html #12;January 2004 · Historically Speaking Einstein's Clocks, Poincaré's Maps:An Interview with Peter. " Moreover, hesuggests that in Einstein's Clocks, Poincaré's Maps Galison "is telling us that hestillbelieves
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS
Emmons, Scott
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS September, 2012 Upcoming Events 1 Drug Development and Public-Private Partnerships Course The Einstein to improved care, better Einstein has launched a new centralized webpage for all Center or Department Pilot
EINSTEIN METRICS ON SPHERES CHARLES P. BOYER, KRZYSZTOF GALICKI AND J
EINSTEIN METRICS ON SPHERES CHARLES P. BOYER, KRZYSZTOF GALICKI AND J â?? ANOS KOLL â?? AR 1 are homogeneous and Einstein, that is the Ricci curvature is a constant multiple of the metric. The spheres S 4m+3 , m > 1 are known to have another Sp(m + 1)Âhomogeneous Einstein metric discovered by Jensen [Jen73
The Einstein Database of IPC Xray Observations of Optically and Radio
Wilkes, Belinda
The Einstein Database of IPC Xray Observations of Optically and Radio Selected Quasars. 1 Belinda February 22, 1995 Abstract We present the first volume of the Einstein quasar database. The database galaxies observed with the Imaging Proportional Counter (IPC) aboard the Einstein observatory. All were
EINSTEIN AND POINCARE A Talk with Peter Galison [6.22.03
Galison, Peter L.
EINSTEIN AND POINCARE A Talk with Peter Galison [6.22.03] "I'm interested in bending the edges, Professor of the History of Science and of Physics at Harvard, asks how Poincaré and Einstein "could have and coordinating mapmaking across the empires might fit into a single story." Regarding Einstein's and Poincaré
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS
Yates, Andrew
Einstein-Montefiore Institute for Clinical and Translational Research ICTR CONNECTIONS FEBRUARY-March, 2013 1 New Med Student Pre-doctoral Research Program: SOAR Einstein has a rich tradition of promoting of genetic or other information. With Einstein seed funds, the Division of Translational Genetics directed
Bose-Einstein correlations in K K pairs from Z 0 decays into two hadronic jets
Bose-Einstein correlations in K #6; K #6; pairs from Z 0 decays into two hadronic jets The OPAL collaboration Abstract Bose-Einstein correlations in pairs of charged kaons produced in a sample of 3.9 million function. The parameters of the Bose- Einstein correlations were measured to be #21; = 0.82 #6; 0.22 + 0
Experiments with Bose-Einstein Condensates in a Double-Well Potential
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
Dynamic Properties of Dilute Bose-Einstein Condensates Dallin S. Durfee
Hart, Gus
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
Progress in year 2002 1. Propagation of Bose-Einstein condensates in a magnetic waveguide
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
Einstein equations in the null quasi-spherical gauge
Robert Bartnik
1997-05-29T23:59:59.000Z
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.
Bose Einstein correlations of neutral pion pairs at LEP
M. Boutemeur; G. Giacomelli
2005-10-10T23:59:59.000Z
With the OPAL detector at LEP we measured at energies around the Z0 peak the Bose-Einstein Correlations (BECs) of neutral pion pairs. We compare the results of this measurement with former results obtained at LEP for hadrons including those obtained from Fermi-Dirac Correlations (FDCs).
Bose-Einstein correlations at LEP and Tevatron energies
G. A. Kozlov; L. Lovas; S. Tokar; Yu. A. Boudagov; A. N. Sissakian
2005-10-04T23:59:59.000Z
Using the Bose-Einstein correlations (BEC) implemented in PYTHIA we investigated a possibility of the CDF experiment at the Tevatron to see the two-particle correlations in the final state of interactions. The approach based on quantum field theory at finite temperature was applied to the ALEPH data at LEP, and the BEC important parameters were retrieved.
Bose-Einstein or HBT correlations in high energy reactions
T. Csorgo
2009-01-07T23:59:59.000Z
Concepts of thermalization and hydrodynamical behavior are applied from time to time to e+e-, hadron+hadron and heavy ion collisions. These applications are scrutinized paying attention to particle multiplicities, spectra, and Bose-Einstein correlations in particular. Can hydrodynamics describe these data?
Einstein static Universe in hybrid metric-Palatini gravity
Christian G. Boehmer; Francisco S. N. Lobo; Nicola Tamanini
2015-02-18T23:59:59.000Z
Hybrid metric-Palatini gravity is a recent and novel approach to modified theories of gravity, which consists of adding to the metric Einstein-Hilbert Lagrangian an f(R) term constructed a la Palatini. It was shown that the theory passes local tests even if the scalar field is very light, and thus implies the existence of a long-range scalar field, which is able to modify the dynamics in galactic and cosmological scales, but leaves the Solar System unaffected. In this work, motivated by the possibility that the Universe may have started out in an asymptotically Einstein static state in the inflationary universe context, we analyse the stability of the Einstein static Universe by considering linear homogeneous perturbations in the respective dynamically equivalent scalar-tensor representation of hybrid metric-Palatini gravity. Considering linear homogeneous perturbations, the stability regions of the Einstein static universe are parametrized by the first and second derivatives of the scalar potential, and it is explicitly shown that a large class of stable solutions exists in the respective parameter space, in the context of hybrid metric-Palatini gravity.
2D dilaton-gravity from 5D Einstein equations
P. F. González-Díaz
1993-07-16T23:59:59.000Z
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.
A Continuous Source of Bose-Einstein Condensed Atoms
-Einstein condensate (BEC) is a macroscopic quantum system with analo- gies to superconductors, superfluids, and opti. In the optical domain, the leap from a pulsed ruby laser (3) to a more complex continuous wave (CW) helium beam from the typical phase-space density of laser cooling (10 6 ) into quantum degeneracy has been
Kinematical Hilbert Space for Einstein-Cartan Theory
Pilc, Marián
2013-01-01T23:59:59.000Z
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.
Kinematical Hilbert Space for Einstein-Cartan Theory
Marián Pilc
2013-12-07T23:59:59.000Z
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.
Einstein-Yang-Mills theory : I. Asymptotic symmetries
Glenn Barnich; Pierre-Henry Lambert
2013-10-10T23:59:59.000Z
Asymptotic symmetries of the Einstein-Yang-Mills system with or without cosmological constant are explicitly worked out in a unified manner. In agreement with a recent conjecture, one finds a Virasoro-Kac-Moody type algebra not only in three dimensions but also in the four dimensional asymptotically flat case.
On the Einstein-Cartan cosmology vs. Planck data
Davor Palle
2014-05-14T23:59:59.000Z
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.
Emergent gravitational dynamics in Bose-Einstein condensates
Lorenzo Sindoni; Florian Girelli; Stefano Liberati
2009-09-29T23:59:59.000Z
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.
Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates
Paris-Sud XI, UniversitÃ© de
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
Inhomogeneous Vortex Patterns in Rotating Bose-Einstein Condensates
Paris-Sud XI, UniversitÃ© de
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
Lauds & Laurels Past Recipients Acosta-Tello, Enid -Distinguished Alumna, 2001
Rose, Michael R.
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
Sorghum Ergot: Distinguishing Sphacelia and Sclerotia of Claviceps africana in Seed
Frederickson, Debra; Odvody, Gary; Isakeit, Thomas
1999-07-05T23:59:59.000Z
. Sclerotia are ?resting? or dormancy structures equipped to withstand degradation by the L-5315 6-99 Sorghum Ergot Distinguishing Sphacelia and Sclerotia of Claviceps africana in Seed Debra E. Frederickson and Gary N. Odvody Assisted by Thomas Isakeit...
10-Dim Einstein spaces made up on basis of 6-Dim Ricci-flat spaces and 4-Dim Einstein spaces
Valery Dryuma
2006-06-09T23:59:59.000Z
Some examples of ten-dimensional vacuum Einstein spaces made up on basis of four-dimensional Ricci-flat spaces and six-dimensional Ricci-flat spaces defined by solutions of the Sin-Gordon equation are constructed. The properties of geodesics for such type of the spaces are discussed
Piepke, Andreas G.
. Kravitz, M. Montero Díez, G. Gratta, W. Fairbank Jr., J. B. Albert, D. J. Auty, P. S. Barbeau, D. Beck, C to manipulate and identify individual Ba ions from bulk liquid Xe K. Twelker,1 S. Kravitz,1 M. Montero Díez,1,a
Alberta, University of
,2, Bret Hoehn1,2, Lindsay Rowe3, and Albert Murtha3 Abstract-- This paper introduces an automatic brain and B. Hoehn are with the Department of Computing Science, University of Alberta. 2 R. Greiner and B. Hoehn are also with the Alberta Innovates Centre for Machine Learning. 3L. Rowe and A. Murtha
Generalized Einstein Relation in an aging colloidal glass
Bérengère Abou; François Gallet; Pascal Monceau; Noëlle Pottier
2007-05-29T23:59:59.000Z
We present an experimental and theoretical investigation of the Generalized Einstein Relation (GER), a particular form of a fluctuation-dissipation relation, in an out-of-equilibrium visco-elastic fluid. Micrometer beads, used as thermometers, are immersed in an aging colloidal glass to provide both fluctuation and dissipation measurements. The deviations from the Generalized Einstein Relation are derived as a function of frequency and aging time. The observed deviations from GER are interpreted as directly related to the change in the glass relaxation times with aging time. In our scenario, deviations are observed in the regime where the observation time scale is of the order of a characteristic relaxation time of the glass.
Bose-Einstein Condensation in the Luttinger-Sy Model
Olivier Lenoble; Valentin Zagrebnov
2006-04-27T23:59:59.000Z
We present a rigorous study of the Bose-Einstein condensation in the Luttinger-Sy model. We prove the existence of the condensation in this one-dimensional model of the perfect boson gas placed in the Poisson random potential of singular point impurities. To tackle the off-diagonal long-range order we calculate explicitly the corresponding space-averaged one-body reduced density matrix. We show that mathematical mechanism of the Bose-Einstein condensation in this random model is similar to condensation in a one-dimensional nonrandom hierarchical model of scaled intervals. For the Luttinger-Sy model we prove the Kac-Luttinger conjecture, i.e., that this model manifests a type I BEC localized in a single "largest" interval of logarithmic size.
Interferometry with Bose-Einstein Condensates in Microgravity
H. Müntinga; H. Ahlers; M. Krutzik; A. Wenzlawski; S. Arnold; D. Becker; K. Bongs; H. Dittus; H. Duncker; N. Gaaloul; C. Gherasim; E. Giese; C. Grzeschik; T. W. Hänsch; O. Hellmig; W. Herr; S. Herrmann; E. Kajari; S. Kleinert; C. Lämmerzahl; W. Lewoczko-Adamczyk; J. Malcolm; N. Meyer; R. Nolte; A. Peters; M. Popp; J. Reichel; A. Roura; J. Rudolph; M. Schiemangk; M. Schneider; S. T. Seidel; K. Sengstock; V. Tamma; T. Valenzuela; A. Vogel; R. Walser; T. Wendrich; P. Windpassinger; W. Zeller; T. van Zoest; W. Ertmer; W. P. Schleich; E. M. Rasel
2013-01-24T23:59:59.000Z
Atom interferometers covering macroscopic domains of space-time are a spectacular manifestation of the wave nature of matter. Due to their unique coherence properties, Bose-Einstein condensates are ideal sources for an atom interferometer in extended free fall. In this paper we report on the realization of an asymmetric Mach-Zehnder interferometer operated with a Bose-Einstein condensate in microgravity. The resulting interference pattern is similar to the one in the far-field of a double-slit and shows a linear scaling with the time the wave packets expand. We employ delta-kick cooling in order to enhance the signal and extend our atom interferometer. Our experiments demonstrate the high potential of interferometers operated with quantum gases for probing the fundamental concepts of quantum mechanics and general relativity.
Interferometry with Bose-Einstein Condensates in Microgravity
Müntinga, H; Krutzik, M; Wenzlawski, A; Arnold, S; Becker, D; Bongs, K; Dittus, H; Duncker, H; Gaaloul, N; Gherasim, C; Giese, E; Grzeschik, C; Hänsch, T W; Hellmig, O; Herr, W; Herrmann, S; Kajari, E; Kleinert, S; Lämmerzahl, C; Lewoczko-Adamczyk, W; Malcolm, J; Meyer, N; Nolte, R; Peters, A; Popp, M; Reichel, J; Roura, A; Rudolph, J; Schiemangk, M; Schneider, M; Seidel, S T; Sengstock, K; Tamma, V; Valenzuela, T; Vogel, A; Walser, R; Wendrich, T; Windpassinger, P; Zeller, W; van Zoest, T; Ertmer, W; Schleich, W P; Rasel, E M
2013-01-01T23:59:59.000Z
Atom interferometers covering macroscopic domains of space-time are a spectacular manifestation of the wave nature of matter. Due to their unique coherence properties, Bose-Einstein condensates are ideal sources for an atom interferometer in extended free fall. In this paper we report on the realization of an asymmetric Mach-Zehnder interferometer operated with a Bose-Einstein condensate in microgravity. The resulting interference pattern is similar to the one in the far-field of a double-slit and shows a linear scaling with the time the wave packets expand. We employ delta-kick cooling in order to enhance the signal and extend our atom interferometer. Our experiments demonstrate the high potential of interferometers operated with quantum gases for probing the fundamental concepts of quantum mechanics and general relativity.
Polymer quantization of the Einstein-Rosen wormhole throat
G. Kunstatter; J. Louko; A. Peltola
2010-01-23T23:59:59.000Z
We present a polymer quantization of spherically symmetric Einstein gravity in which the polymerized variable is the area of the Einstein-Rosen wormhole throat. In the classical polymer theory, the singularity is replaced by a bounce at a radius that depends on the polymerization scale. In the polymer quantum theory, we show numerically that the area spectrum is evenly-spaced and in agreement with a Bohr-Sommerfeld semiclassical estimate, and this spectrum is not qualitatively sensitive to issues of factor ordering or boundary conditions except in the lowest few eigenvalues. In the limit of small polymerization scale we recover, within the numerical accuracy, the area spectrum obtained from a Schrodinger quantization of the wormhole throat dynamics. The prospects of recovering from the polymer throat theory a full quantum-corrected spacetime are discussed.
Improved gauge driver for the generalized harmonic Einstein system
Lindblom, Lee; Szilagyi, Bela [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)
2009-10-15T23:59:59.000Z
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.
Back reaction of the neutrino field in an Einstein universe
M. B. Altaie
2002-12-31T23:59:59.000Z
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.
An Electrical Spinning Particle In Einstein's Unified Field Theory
S. N. Pandey; B. K. Sinha; Raj Kumar
2006-10-01T23:59:59.000Z
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.
Polymer quantization of the Einstein-Rosen wormhole throat
Kunstatter, Gabor; Peltola, Ari [Department of Physics, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 (Canada); Louko, Jorma [School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD (United Kingdom)
2010-01-15T23:59:59.000Z
We present a polymer quantization of spherically symmetric Einstein gravity in which the polymerized variable is the area of the Einstein-Rosen wormhole throat. In the classical polymer theory, the singularity is replaced by a bounce at a radius that depends on the polymerization scale. In the polymer quantum theory, we show numerically that the area spectrum is evenly spaced and in agreement with a Bohr-Sommerfeld semiclassical estimate, and this spectrum is not qualitatively sensitive to issues of factor ordering or boundary conditions except in the lowest few eigenvalues. In the limit of small polymerization scale we recover, within the numerical accuracy, the area spectrum obtained from a Schroedinger quantization of the wormhole throat dynamics. The prospects of recovering from the polymer throat theory a full quantum-corrected spacetime are discussed.
Quantum-limited metrology and Bose-Einstein condensates
Sergio Boixo; Animesh Datta; Matthew J. Davis; Anil Shaji; Alexandre B. Tacla; Carlton M. Caves
2009-08-18T23:59:59.000Z
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.
Supermassive Black Holes as Giant Bose-Einstein Condensates
Theo M. Nieuwenhuizen
2008-07-02T23:59:59.000Z
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.
Distillation of Bose-Einstein condensates in a double-well potential The characteristic feature by preparing a Bose-Einstein condensate in an optical dipole trap and distilling it into a second empty dipole trap adjacent to the first one [2]. The distillation was driven by thermal atoms spilling over
Creation of Dirac Monopoles in Spinor Bose-Einstein Condensates
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
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.
Bose-Einstein Condensates as a Probe for Lorentz Violation
Don Colladay; Patrick McDonald
2006-02-08T23:59:59.000Z
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.
On the Solutions of Einstein Equations with Massive Point Source
P. P. Fiziev
2004-12-30T23:59:59.000Z
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
LIMITE DE CHAMP MOYEN ET CONDENSATION DE BOSE-EINSTEIN
-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
Class of Einstein-Maxwell-dilaton-axion space-times
Matos, Tonatiuh; Miranda, Galaxia; Sanchez-Sanchez, Ruben; Wiederhold, Petra [Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 14-740, 07000 Distrito Federal (Mexico); Departamento de Fisica, Escuela Superior de Fisica y Matematicas del IPN, Edificio 9, 07738 Distrito Federal (Mexico); Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada del IPN, Legaria 694, 11500 Distrito Federal (Mexico); Departamento de Control Automatico, Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 14-740, 07000 Distrito Federal (Mexico)
2009-06-15T23:59:59.000Z
We use the harmonic maps ansatz to find exact solutions of the Einstein-Maxwell-dilaton-axion (EMDA) equations. The solutions are harmonic maps invariant to the symplectic real group in four dimensions Sp(4,R){approx}O(5). We find solutions of the EMDA field equations for the one- and two-dimensional subspaces of the symplectic group. Specially, for illustration of the method, we find space-times that generalize the Schwarzschild solution with dilaton, axion, and electromagnetic fields.
Class of Einstein-Maxwell-Dilaton-Axion Space-Times
Tonatiuh Matos; Galaxia Miranda; Ruben Sanchez-Sanchez; Petra Wiederhold
2009-05-26T23:59:59.000Z
We use the harmonic maps ansatz to find exact solutions of the Einstein-Maxwell-Dilaton-Axion (EMDA) equations. The solutions are harmonic maps invariant to the symplectic real group in four dimensions $Sp(4,\\Rreal)\\sim O(5)$. We find solutions of the EMDA field equations for the one and two dimensional subspaces of the symplectic group. Specially, for illustration of the method, we find space-times that generalise the Schwarzschild solution with dilaton, axion and electromagnetic fields.
Bose-Einstein condensates in rf-dressed adiabatic potentials
White, M.; Gao, H.; Pasienski, M.; DeMarco, B. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
2006-08-15T23:59:59.000Z
Bose-Einstein condensates of {sup 87}Rb atoms are transferred into radio-frequency induced adiabatic potentials and the properties of the corresponding dressed states are explored. We report on measurements of the spin composition of dressed condensates. We also show that adiabatic potentials can be used to trap atom gases in novel geometries, including suspending a cigar-shaped cloud above a curved sheet of atoms.
Photon-photon gates in Bose-Einstein condensates
Arnaud Rispe; Bing He; Christoph Simon
2010-09-30T23:59:59.000Z
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.
Beyond spontaneously broken symmetry in Bose-Einstein condensates
W. J. Mullin; F. Laloë
2009-12-31T23:59:59.000Z
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).
Liquid-Gas phase transition in Bose-Einstein Condensates
A. Gammal; T. Frederico; L. Tomio; Ph. Chomaz
1999-04-13T23:59:59.000Z
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.
Controlling chaos in the Bose-Einstein condensate
Cong Fuzhong, E-mail: wzx2007111@126.com; Wang Zhixia; Hua Hongtu; Pang Shichun; Tong Shouyu [Aviation University of Air Force (China)
2012-03-15T23:59:59.000Z
The spatial structure of the Bose-Einstein condensate (BEC) is investigated and spatially chaotic distributions of the condensates are revealed. By means of changing the s-wave scattering length with a Feshbach resonance, the chaotic behavior can be well controlled to enter into periodicity. Numerical simulation shows that there are different periodic orbits according to different s-wave scattering lengths only if the Lyapunov exponent of the system is negative.
Einstein, incompleteness, and the epistemic view of quantum states
Nicholas Harrigan; Robert W. Spekkens
2007-06-18T23:59:59.000Z
Does the quantum state represent reality or our knowledge of reality? In making this distinction precise, we are led to a novel classification of hidden variable models of quantum theory. Indeed, representatives of each class can be found among existing constructions for two-dimensional Hilbert spaces. Our approach also provides a fruitful new perspective on arguments for the nonlocality and incompleteness of quantum theory. Specifically, we show that for models wherein the quantum state has the status of something real, the failure of locality can be established through an argument considerably more straightforward than Bell's theorem. The historical significance of this result becomes evident when one recognizes that the same reasoning is present in Einstein's preferred argument for incompleteness, which dates back to 1935. This fact suggests that Einstein was seeking not just any completion of quantum theory, but one wherein quantum states are solely representative of our knowledge. Our hypothesis is supported by an analysis of Einstein's attempts to clarify his views on quantum theory and the circumstance of his otherwise puzzling abandonment of an even simpler argument for incompleteness from 1927.
Beyond Einstein ... Are we all afraid of the Truth?
Sanjay M Wagh
2006-03-20T23:59:59.000Z
The power-point presentation \\cite{ppt} provided herein shows exactly why Einstein's field equations of his general relativity are based on an illogical approach to representing the observable world. Einstein had, in fact, discarded these equations way back in 1928 when he had began his solitary search for a unified field theory. However, the rest of us learned, taught, and also put too much faith for too long (for more than seventy years) in an illogical approach to representing the observable world. Consequently, we have developed great reluctance, resulting from dogmatic perceptions, prestige, reputation, ..., that is holding us back from orienting ourselves in the ``right'' direction to the understanding of the observable phenomena. This raises the question mentioned in the title: Are we all afraid of the Truth? Rhetorically speaking, we could then also ask: are we all afraid of Virginia Woolf? In the sequel, I also illustrate my approach to going Beyond Einstein for developing an appropriate mathematical framework for the fundamental physical ideas behind the General Principle of Relativity, for the unification of fundamental physical interactions and, hence, for a theory of everything.
Bose-Einstein correlations and color reconnection in hadronic W
Raimund Ströhmer
2006-01-09T23:59:59.000Z
We report on studies of Bose-Einstein correlations and color reconnection in hadronic W pair production at LEP. Bose-Einstein correlations between identical particles from the decay of different W's are studied by comparing the particle correlation in hadronic W pair decays to those in events which are constructed from the combination of the hadronic parts of two events where one of the Ws decays leptonicaly. The LEP combined result of the strength of the effect is consistent with zero and can be used to limit the systematic uncertainty due to Bose-Einstein correlations on the W mass measurements. Color reconnection is expected to affect the production of particles in hadronic decays of W pairs. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of color reconnection. The results are both consistent with models without color reconnection and models with moderate color reconnection. They can be used to exclude more extreme models of color reconnection and thereby limit the uncertainty due to color reconnection on the W mass measurement.
A Machian Version of Einstein's Variable Speed of Light Theory
Alexander Unzicker; Jan Preuss
2015-03-28T23:59:59.000Z
It is a little known fact that while he was developing his theory of general relativity, Einstein's initial idea was a variable speed of light theory. Indeed space-time 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 has the equivalence of the variable speed of light approach to the conventional formalism 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 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, has its origin in all other masses in the universe.
Energy decomposition within Einstein-Born-Infeld black holes
Jonas P. Pereira; Jorge A. Rueda
2015-03-09T23:59:59.000Z
We analyze the consequences of the recently found generalization of the Christodoulou-Ruffini black hole mass decomposition for Einstein-Born-Infeld black holes [characterized by the parameters $(Q,M,b)$, where $M = M(M_{irr},Q,b)$, $b$ scale field, $Q$ charge, $M_{irr}$ "irreducible mass", physically meaning the energy of a black hole when its charge is null] and their interactions. We show in this context that their description is largely simplified and can basically be split into two families depending upon the parameter $b|Q|$. If $b|Q|\\leq 1/2$, then black holes could have even zero irreducible masses and they always exhibit single, non degenerated, horizons. If $b|Q|>1/2$, then an associated black hole must have a minimum irreducible mass (related to its minimum energy) and has two horizons up to a transitional irreducible mass. For larger irreducible masses, single horizon structures raise again. By assuming that black holes emit thermal uncharged scalar particles, we further show in light of the black hole mass decomposition that one satisfying $b|Q|>1/2$ takes an infinite amount of time to reach the zero temperature, settling down exactly at its minimum energy. Finally, we argue that depending on the fundamental parameter $b$, the radiation (electromagnetic and gravitational) coming from Einstein-Born-Infeld black holes could differ significantly from Einstein-Maxwell ones. Hence, it could be used to assess such a parameter.
Analogue spacetime based on 2-component Bose-Einstein condensates
Silke Weinfurtner; Stefano Liberati; Matt Visser
2006-05-22T23:59:59.000Z
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.
Portable radiation-detection instruments for distinguishing nuclear from non-nuclear munitions
Fehlau, P.E.
1991-01-01T23:59:59.000Z
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.
Method and apparatus for distinguishing actual sparse events from sparse event false alarms
Spalding, Richard E. (Albuquerque, NM); Grotbeck, Carter L. (Albuquerque, NM)
2000-01-01T23:59:59.000Z
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.
Distinguishing Neutrino Mass Hierarchies using Dark Matter Annihilation Signals at IceCube
Rouzbeh Allahverdi; Bhaskar Dutta; Dilip Kumar Ghosh; Bradley Knockel; Ipsita Saha
2015-06-27T23:59:59.000Z
We explore the possibility of distinguishing neutrino mass hierarchies through the neutrino signal from dark matter annihilation at neutrino telescopes. We consider a simple extension of the standard model where the neutrino masses and mixing angles are obtained via the type-II seesaw mechanism. We show that for a detector with the same capability as the IceCube DeepCore array, multiyear data from DM annihilation at the Galactic Center and inside the Sun can be used to distinguish the normal and inverted neutrino mass hierarchies.
New Einstein Metrics in Dimension Five Charles P. Boyer Krzysztof Galicki
New Einstein Metrics in Dimension Five Charles P. Boyer Krzysztof Galicki Abstract: The purpose of this note is to prove the existence of new SasakianÂEinstein metÂ rics on S 2 \\ThetaS 3 and on (S 2 \\ThetaS 3 )#(S 2 \\ThetaS 3 ): These give the first known examples of nonÂregular SasakianÂEinstein 5
Einstein as the Greatest of the Nineteenth Century Physicists John D. Norton
Einstein as the Greatest of the Nineteenth Century Physicists John D. Norton Department of History://www.pitt.edu/~jdnorton This text is based on the chapter of the same name in my online textbook, Einstein for Everyone at http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/index.html Modern day writers often endow Einstein with a 21st century prescience about
G. A. Alekseev
2014-11-13T23:59:59.000Z
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.
Chikkatur, Ananth P.
2006-02-22T23:59:59.000Z
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
Controlling phase separation of a two-component Bose-Einstein ...
2012-04-05T23:59:59.000Z
Apr 5, 2012 ... Bose-Einstein condensate is insufficient if kinetic energy is taken into account, which competes against the intercomponent interaction and ...
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...
TEXAS A&M AGRILIFE TEXAS A&M DISTINGUISHED TEXAN IN AGRICULTURE AWARD
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
Distinguishing human ethnic groups by means of sequences from Helicobacter pylori
Wirth, Thierry
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
George W. Crabtree George Crabtree is Distinguished Professor of Physics, Electrical,
Illinois at Chicago, University of
, and Mechanical Engineering at University of Illinois at Chicago and Senior Scientist and Distinguished Fellow, a notable accomplishment. He has an R&D 100 Award for his pioneering development of Magnetic Flux Imaging of the Advisory Committee for the National Magnet Laboratory in Tallahassee, Florida, and as Editor of several
ELLEN STONE MOSLEY-THOMPSON Distinguished University Professor, Department of Geography
Howat, Ian M.
1 ELLEN STONE MOSLEY-THOMPSON Distinguished University Professor, Department of Geography Director, Byrd Polar Research Center The Ohio State University, Columbus OH thompson.4@osu.edu; phone 614 (125) 2013 Thompson, L.G., E. Mosley-Thompson, M.E. Davis, V.S. Zagorodnov, I.M. Howat, V.N. Mikhalenko
ELLEN STONE MOSLEY-THOMPSON Distinguished University Professor, Department of Geography
Howat, Ian M.
1 ELLEN STONE MOSLEY-THOMPSON Distinguished University Professor, Department of Geography Director, Byrd Polar Research Center The Ohio State University, Columbus OH thompson.4@osu.edu; phone 614 are available at http://bprc.osu.edu/Icecore/Abstracts/Publications.html 2013 Thompson, L.G., E. Mosley-Thompson
Illinois at Chicago, University of
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
Lee, H.C. Paul
fragility). A key research problem is distinguishing among laws, protocols, and historical frequency and voltag- es of delivered power, oil refineries have 10,000 such control loops, and Internet, terabytes of data, and a billion-dollar price tag. 55. Systems Biology Workbench (www.cds.caltech.edu/ sbw
Classifying Climbs in Soaring Flight Data 1 Data Mining to distinguish Wave vs. Thermal
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
Sender-Based Heuristics for Distinguishing Congestion Losses from Wireless Transmission Losses
Vaidya, Nitin
Sender-Based Heuristics for Distinguishing Congestion Losses from Wireless Transmission Losses Saad-3112, USA E-mail: saadb@cs.tamu.edu Phone : (409) 845-5007 Fax : (409) 847-8578 Technical Report #98-013 Abstract TCP is a popular transport protocol used in present-day internet. When packet losses occur, TCP
A Bayesian Approach for TCP to Distinguish Congestion from Wireless Losses #
A Bayesian Approach for TCP to Distinguish Congestion from Wireless Losses # Dhiman Barman,matta}@cs.bu.edu Technical Report BUCSÂ2003Â030 Abstract. The Transmission Control Protocol (TCP) has been the protocol approach to infer at the source host the reason of a packet loss, whether congesÂ tion or wireless
Using End-to-End Statistics to Distinguish Congestion and Corruption Losses
Vaidya, Nitin
://www.cs.tamu.edu/faculty/vaidya/mobile.html Technical Report 97-009 August 18, 1997 Abstract On wireless links, the rate of corruption losses canUsing End-to-End Statistics to Distinguish Congestion and Corruption Losses: A Negative Result Saad be signi cant, leading to poor TCP performance. The performance gets worse when these losses are mistaken
Differentiated Services: A New Direction for Distinguishing Congestion Losses from Wireless Losses
Differentiated Services: A New Direction for Distinguishing Congestion Losses from Wireless Losses Sa^ad Biaz Nitin H. Vaidya Â¡Â£Â¢ sbiaz@eng.auburn.edu nhv@crhc.uiuc.edu February 21, 2003 Technical Report # CSSE03-02 Abstract Currently, a TCP sender considers all losses as congestion signals and reacts
Testing Photons' Bose-Einstein Statistics With Compton Scattering
Brett Altschul
2010-08-27T23:59:59.000Z
It is an empirical question whether photons always obey Bose-Einstein statistics, but devising and interpreting experimental tests of photon statistics can be a challenge. The nonrelativistic cross section for Compton scattering illustrates how a small admixture nu of wrong-sign statistics leads to a loss of gauge invariance; there is a large anomalous amplitude for scattering timelike photons. Nevertheless, one can interpret the observed transparency of the solar wind plasma at low frequencies as a bound nu < 10^(-25) if Lorentz symmetry is required. If there is instead a universal preferred frame, the bound is nu < 10^(-14), still strong compared with previous results.
Bose-Einstein Correlations and the Tau-Model
W. J. Metzger; T. Novák; T. Csörg?; W. Kittel
2011-05-09T23:59:59.000Z
Bose-Einstein correlations of pairs of identical charged pions produced in hadronic Z decays are analyzed in terms of various parametrizations. A good description is achieved using a L\\'evy stable distribution in conjunction with a model where a particle's momentum is highly correlated with its space-time point of production, the tau model. However, a small but significant elongation of the particle emission region is observed in the Longitudinal Center of Mass frame, which is not accommodated in the tau model. This is investigated using an ad hoc modification of the tau model.
Causality Constraint on Noncritical Einstein-Weyl Gravity
Fu-Wen Shu; Yungui Gong
2014-10-31T23:59:59.000Z
We explore, in the context of AdS/CFT correspondence, the causality constraints on the Noncritical Einstein-Weyl (NEW) gravity model in five dimensions. The scalar and shear channels are considered as small metric perturbations around an AdS black brane background. Our results show that causality analysis on the propagation of these two channels imposes a new bound on the coupling of the Weyl-squared terms in the NEW gravity. This new bound imposes more stringent restrictions than those of the tachyon-free condition, improving predictive power of the theory.
2+1 dimensional solution of Einstein Cartan equations
M. Hortacsu; H. T. Ozcelik; N. Ozdemir
2008-07-28T23:59:59.000Z
In this work a static solution of Einstein-Cartan (EC) equations in 2+1 dimensional space-time is given by considering classical spin-1/2 field as external source for torsion of the space-time. Here, the torsion tensor is obtained from metricity condition for the connection and the static spinor field is determined as the solution of Dirac equation in 2+1 spacetime with non-zero cosmological constant and torsion. The torsion itself is considered as a non-dynamical field.
Quantum-information approach to rotating Bose-Einstein condensates
Liu Zhao; Guo Hongli; Chen Shu; Fan Heng [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2009-12-15T23:59:59.000Z
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.
On Einstein-Cartan Theory: I. Kinematical description
Marián Pilc
2013-12-07T23:59:59.000Z
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.
On Einstein-Cartan Theory: I. Kinematical description
Pilc, Marián
2013-01-01T23:59:59.000Z
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.
Spectroscopy of the Einstein-Maxwell-Dilaton-Axion black hole
Deyou Chen; Haitang Yang
2012-10-03T23:59:59.000Z
The entropy spectrum of a spherically symmetric black hole was derived via the Bohr-Sommerfeld quantization rule in Majhi and Vagenas's work. Extending this work to charged and rotating black holes, we quantize the horizon area and the entropy of an Einstein-Maxwell-Dilaton-Axion (EMDA) black hole via the Bohr-Sommerfeld quantization rule and the adiabatic invariance. The result shows the area spectrum and the entropy spectrum are respectively equally spaced and independent on the parameters of the black hole.
Bose-Einstein Condensation of Dark Matter Axions
Sikivie, P.; Yang, Q. [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
2009-09-11T23:59:59.000Z
We show that cold dark matter axions thermalize and form a Bose-Einstein condensate (BEC). We obtain the axion state in a homogeneous and isotropic universe, and derive the equations governing small axion perturbations. Because they form a BEC, axions differ from ordinary cold dark matter in the nonlinear regime of structure formation and upon entering the horizon. Axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multipoles.
On isotropic metric of Schwarzschild solution of Einstein equation
T. Mei
2006-10-24T23:59:59.000Z
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
Foliation, jet bundle and quantization of Einstein gravity
I. Y. Park
2015-03-14T23:59:59.000Z
With the Hamiltonian and Lagrangian analyses in the ADM setup, it was observed in \\cite{Park:2014tia} that the physical configuration space of the 4D Einstein-Hilbert action admits a three-dimensional description. Subsequently, a more mathematical picture of the reduction based on foliation theory was presented in \\cite{Park:2014qoa}. In this work, we expand \\cite{Park:2014qoa} by adding another mathematical ingredient - an element of jet bundle theory - and present a more systematic and refined account thereof.
Three-dimensional asymptotically flat Einstein-Maxwell theory
Glenn Barnich; Pierre-Henry Lambert; Pujian Mao
2015-03-03T23:59:59.000Z
Three-dimensional Einstein-Maxwell theory with non trivial asymptotics at null infinity is solved. The symmetry algebra is a Virasoro-Kac-Moody type algebra that extends the bms3 algebra of the purely gravitational case. Solution space involves logarithms and provides a tractable example of a polyhomogeneous solution space. The associated surface charges are non-integrable and non-conserved due to the presence of electromagnetic news. As in the four dimensional purely gravitational case, their algebra involves a field-dependent central charge.
Acceleration of particles in Einstein-Maxwell-Dilaton black hole
Pu-Jian Mao; Ran Li; Lin-Yu Jia; Ji-Rong Ren
2011-03-08T23:59:59.000Z
It has been recently pointed out that, under certain conditions, the energy of particles accelerated by black holes in the center-of-mass frame can become arbitrarily high. In this Letter, we study the collision of two particles around the four-dimensional Kaluza-Klein black hole in Einstein-Maxwell-Dilaton theory. We find that the center-of-mass energy for a pair of colliding particles is unlimited at the horizon of charged nonrotating and extremal rotating Kaluza-Klein black hole.
A New Solution of Einstein Vacuum Field Equations
Ram Gopal Vishwakarma
2014-09-11T23:59:59.000Z
A new solution of Einstein's vacuum field equations is discovered which appears as a generalization of the well-known Ozsvath-Schucking solution and explains its source of curvature which has otherwise remained hidden. Curiously, the new solution has a vanishing Kretschmann scalar and is singularity-free despite being curved. The discovery of the new solution is facilitated by a new insight which reveals that it is always possible to define the source of curvature in a vacuum solution in terms of some dimensional parameters. As the parameters vanish, so does the curvature. The new insight also helps to make the vacuum solutions Machian.
Dark Matter Halos as Bose-Einstein Condensates
Eckehard W. Mielke; Burkhard Fuchs; Franz E. Schunck
2006-08-24T23:59:59.000Z
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.
Optimal quantum control of Bose Einstein condensates in magnetic microtraps
Ulrich Hohenester; Per Kristian Rekdal; Alfio Borzi; Joerg Schmiedmayer
2007-01-15T23:59:59.000Z
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.
Fidelity decay in trapped Bose-Einstein condensates
G. Manfredi; P. -A. Hervieux
2008-01-29T23:59:59.000Z
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.
Cappelluti, Emmanuele
Gesellschaft für Synchrotronstrahlung m.b.H (BESSY), Albert-Einstein-Strasse 15, D-12489 Berlin, Germany E Berliner Elektronenspeicherring Gesellschaft für Synchtrotronstrahlung m.b.H (BESSY), Albert
Fermi-Einstein condensation in dense QCD-like theories
Kurt Langfeld; Andreas Wipf
2011-09-02T23:59:59.000Z
While pure Yang-Mills theory feature the centre symmetry, this symmetry is explicitly broken by the presence of dynamical matter. We study the impact of the centre symmetry in such QCD-like theories. In the analytically solvable Schwinger model, centre transitions take place even under extreme conditions, temperature and/or density, and we show that they are key to the solution of the Silver-Blaze problem. We then develop an effective SU(3) quark model which confines quarks by virtue of centre sector transitions. The phase diagram by confinement is obtained as a function of the temperature and the chemical potential. We show that at low temperatures and intermediate values for the chemical potential the centre dressed quarks undergo condensation due to Bose like statistics. This is the Fermi Einstein condensation. To corroborate the existence of centre sector transitions in gauge theories with matter, we study (at vanishing chemical potential) the interface tension in the three-dimensional Z2 gauge theory with Ising matter, the distribution of the Polyakov line in the four-dimensional SU(2)-Higgs model and devise a new type of order parameter which is designed to detect centre sector transitions. Our analytical and numerical findings lead us to conjecture a new state of cold, but dense matter in the hadronic phase for which Fermi Einstein condensation is realised.
Wave turbulence and vortices in Bose-Einstein condensation
Sergey Nazarenko; Miguel Onorato
2005-07-25T23:59:59.000Z
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.
Strong gravitational lensing of gravitational waves in Einstein Telescope
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
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.
Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology
Songbai Chen; Bin Wang; Jiliang Jing
2008-11-10T23:59:59.000Z
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.
Diffractive Nonlinear Geometrical Optics for Variational Wave Equations and the Einstein Equations
Giuseppe Ali; John K. Hunter
2005-11-02T23:59:59.000Z
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.
Asymptotic singular behaviour of inhomogeneous cosmologies in Einstein-Maxwell-dilaton-axion theory
Luis A. Lopez; Nora Breton
2006-08-29T23:59:59.000Z
We present the study of exact inhomogeneous cosmological solutions to a four-dimensional low energy limit of string theory containing non-minimal interacting electromagnetic, dilaton and axion fields. We analyze Einstein-Rosen solutions of Einstein-Maxwell-dilaton-axion equations and show, by explicitly taken the asymptotic limits, that they have asymptotically velocity-term dominated (AVTD) singularities.
Einstein energy-momentum complex for a phantom black hole metric
P. K. Sahoo; K. L. Mahanta; D. Goit; A. K. Sihna; S. S. Xulu; U. R. Das; A. Prasad; R. Prasad
2015-01-16T23:59:59.000Z
In this paper we calculate the energy distribution E(r) associated with a static spherically symmetric non-singular phantom black hole metric in Einstein's prescription in general relativity. As required for Einstein energy-momentum complex, we perform calculations in quasi-Cartesian coordinates. We also calculate momentum components and get zero values as expected from the geometry of the metric.
Einstein's View of God Nancy Ellen Abrams and Joel R. Primack
California at Santa Cruz, University of
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
ccsd-00021948,version1-29Mar2006 Bose-Einstein condensates in fast rotation
Boyer, Edmond
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
Abraham, Eric
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
PreprintKULTF2000/12 Interferencing in coupled BoseEinstein condensates
PreprintÂKULÂTFÂ2000/12 Interferencing in coupled BoseÂEinstein condensates T. Michoel 1 , AÂEinstein condensates with a JosephÂ sonÂtype 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
Vortex-peak interaction and lattice shape in rotating two-component Bose-Einstein condensates
Wei, Jun-cheng
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
Efficiently computing vortex lattices in fast rotating Bose-Einstein condensates Yanzhi Zhang1,2
Bao, Weizhu
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
Dynamical quantum noise in trapped Bose-Einstein condensates M. J. Steel,1,2
Queensland, University of
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
ccsd00001592, Interference of an array of independent Bose-Einstein condensates
-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
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
Formation and Decay of Vortex Lattices in Bose-Einstein Condensates at Finite Temperatures
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
Progress in year 2001 1. Observation of Vortex Lattices in Bose-Einstein Condensates
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
Bose-Einstein condensates in 85 Rb gases at higher densities
Glyde, Henry R.
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
Feshbach resonance management of Bose-Einstein condensates in optical lattices Mason A. Porter
Porter, Mason A.
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
Experimental observation of the Bogoliubov transformation for a Bose-Einstein condensed gas
Experimental observation of the Bogoliubov transformation for a Bose- Einstein condensed gas phonons into the condensate, momentum analysis via Bragg spectroscopy transfers a momentum Â±Q (two photon of the Bogoliubov transformation for a Bose-Einstein condensed gas, Phys. Rev. Lett. 88, 060402 (2002). #12;
0.5setgray00.5setgray1 Bose-Einstein condensates in optical lattices
Cipolatti, Rolci
0.5setgray00.5setgray1 Bose-Einstein condensates in optical lattices: mathematical analysis Â 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
NUMERICAL COMPUTATION OF QUANTIZED VORTICES IN THE BOSE-EINSTEIN CONDENSATE
Du, Qiang
. 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
Distinguishing a SM-like MSSM Higgs boson from SM Higgs boson at muon collider
Jai Kumar Singhal; Sardar Singh; Ashok K Nagawat
2005-07-26T23:59:59.000Z
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.
Ilya Mandel; Carl-Johan Haster; Michal Dominik; Krzysztof Belczynski
2015-05-04T23:59:59.000Z
We analyze the distinguishability of populations of coalescing binary neutron stars, neutron-star black-hole binaries, and binary black holes, whose gravitational-wave signatures are expected to be observed by the advanced network of ground-based interferometers LIGO and Virgo. We consider population-synthesis predictions for plausible merging binary distributions in mass space, along with measurement accuracy estimates from the main gravitational-wave parameter-estimation pipeline. We find that for our model compact-object binary mass distribution, we can always distinguish binary neutron stars and black-hole--neutron-star binaries, but not necessarily black-hole--neutron-star binaries and binary black holes; however, with a few tens of detections, we can accurately identify the three subpopulations and measure their respective rates.
Reconstruction of Einstein-Aether Gravity from other Modified Gravity Models
Chayan Ranjit; Ujjal Debnath
2014-09-08T23:59:59.000Z
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.
Water value in power generation: Experts distinguish water use and consumption
Kalisek, D
2013-01-01T23:59:59.000Z
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...
Distinguishing between Dirac and Majorana Neutrinos with Two-Particle Interferometry
Gutierrez, Thomas D. [Nuclear Science Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2006-03-31T23:59:59.000Z
Two-particle interferometry, a second-order interference effect, is explored as another possible tool to distinguish between massive Dirac and Majorana neutrinos. A simple theoretical framework is discussed in the context of several gedanken experiments. The method can in principle provide both the mass scale and the quantum nature of the neutrino for a certain class of incoherent left-handed source currents.
Water value in power generation: Experts distinguish water use and consumption
Kalisek, D
2013-01-01T23:59:59.000Z
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...
Ulsoy, A. Galip
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
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
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.
Einstein relation for biased random walk on Galton--Watson trees Gerard Ben Arous # Yueyun Hu + Stefano Olla # Ofer Zeitouni Â§ June 19, 2011 Abstract We prove the Einstein relation, relating on Galton--Watson trees. This provides the first example where the Einstein relation is proved for motion
Watrous, John
Einstein-Podolsky-Rosen steering provides the advantage in entanglement-assisted subchannel-based quantum effect that embodies the "spooky action at a dis- tance" disliked by Einstein and scrutinized by Einstein, Podolsky, and Rosen. Here we provide a necessary and sufficient characterization of steering
Boyer, Edmond
-Einstein condensates Ionut Danaila,a,b , FrÂ´edÂ´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
Recanati, Catherine
ÂEinstein 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 fastÂrotating BoseÂEinstein condensates requireÂEinstein condensate, vortex, Sobolev gradient, descent method. 1. Introduction Recent research e#orts in the field
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
Modulated amplitude waves with non-trivial phase in quasi-1D inhomogeneous Bose-Einstein condensates
Arias, Cristina M.
-Einstein condensates Pedro J. Torres Departamento de MatemÂ´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
Localized breathing solutions for BoseÂEinstein condensates in periodic traps. R. Carretero6, Canada (June 1, 2001) We consider BoseÂEinstein condensates confined by a peÂ riodic potentialÂ Einstein condensates (BECs) has triggered a vast interÂ est in the physics community. Novel techniques
Holographic Superconductors from Einstein-Maxwell-Dilaton Gravity
Yan Liu; Ya-Wen Sun
2010-07-07T23:59:59.000Z
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.
Newton's cradle analogue with Bose-Einstein condensates
Roberto Franzosi; Ruggero Vaia
2014-03-20T23:59:59.000Z
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.
Bose-Einstein Correlations in Multihadron Events at LEP
C. Ciocca; M. Cuffiani; G. Giacomelli
2007-12-05T23:59:59.000Z
Bose-Einstein correlations in pairs of identical particles were analyzed in e+ e- multihadron annihilations at ~91.2 GeV at LEP. The first studies involved identical charged pions and the emitting source size was determined. Then the study of charged kaons suggested that the radius depends on the mass of the emitted particles. Subsequenty the dependence of the source radius on the event multiplicity was analyzed. The study of the correlations in neutral pions and neutral kaons extended these concepts to neutral particles. The shape of the source was analyzed in 3 dimensions and was found not to be spherically symmetric. In recent studies at LEP the correlations were analyzed in intervals of the average pair transverse momentum and of the pair rapidity to study the correlations between the pion production points and their momenta (position-momentum correlations). The latest e+ e- data are consistent with an expanding source.
Einstein-Maxwell equations for asymmetric resonant cavities
Frasca, Marco
2015-01-01T23:59:59.000Z
We analyze the behavior of electromagnetic fields inside a resonant cavity by solving Einstein--Maxwell field equations. It is shown that the modified geometry of space-time inside the cavity due to a propagating mode can affect the propagation of a laser beam. It is seen that components of laser light with a shifted frequency appear originating from the coupling between the laser field and the mode cavity due to gravity. The analysis is extended to the case of an asymmetric resonant cavity taken to be a truncated cone. It is shown that a proper choice of the geometrical parameters of the cavity and dielectric can make the gravitational effects significant for an interferometric setup. This could make possible to realize table-top experiments involving gravitational effects.
Fast production of Bose-Einstein condensates of metastable Helium
Bouton, Q; Hoendervanger, A L; Nogrette, F; Aspect, A; Westbrook, C I; Clément, D
2015-01-01T23:59:59.000Z
We report on the Bose-Einstein condensation of metastable Helium-4 atoms using a hybrid approach, consisting of a magnetic quadrupole and a crossed optical dipole trap. In our setup we cross the phase transition with 2x10^6 atoms, and we obtain pure condensates of 5x10^5 atoms in the optical trap. This novel approach to cooling Helium-4 provides enhanced cycle stability, large optical access to the atoms and results in production of a condensate every 6 seconds - a factor 3 faster than the state-of-the-art. This speed-up will dramatically reduce the data acquisition time needed for the measurement of many particle correlations, made possible by the ability of metastable Helium to be detected individually.
Josephson effects in a Bose–Einstein condensate of magnons
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
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.
Bose-Einstein condensation in liquid 4He under 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
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.
Geometric Phase in a Bose-Einstein Josephson Junction
Radha Balakrishnan; Mitaxi Mehta
2003-07-04T23:59:59.000Z
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.
The Violation of Stokes-Einstein Relation in Supercooled Water
Sow-Hsin Chen; Francesco Mallamace; Chung-Yuan Mou; Matteo Broccio; Carmelo Corsaro; Antonio Faraone; Li Liu
2006-05-17T23:59:59.000Z
By confining water in nanopores, so narrow that the liquid cannot freeze, it is possible to explore its properties well below its homogeneous nucleation temperature TH ~ 235 K. In particular, the dynamical parameters of water can be measured down to 180 K approaching the suggested glass transition temperature Tg ~ 165 K. Here we present experimental evidence, obtained from Nuclear Magnetic Resonance and Quasi-Elastic Neutron Scattering spectroscopies, of a well defined decoupling of transport properties (the self-diffusion coefficient and the average translational relaxation time), which implies the breakdown of the Stokes-Einstein relation. We further show that such a non-monotonic decoupling reflects the characteristics of the recently observed dynamic crossover, at about 225 K, between the two dynamical behaviors known as fragile and strong, which is a consequence of a change in the hydrogen bond structure of liquid water.
A Bose-Einstein Model of Particle Multiplicity Distributions
A. Z. Mekjian; T. Csorgo; S. Hegyi
2006-12-19T23:59:59.000Z
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.
Internal Josephson effects in spinor dipolar Bose-Einstein condensates
Yasunaga, Masashi; Tsubota, Makoto [Department of Physics, Osaka City University, Sumiyoshi-ku, Osaka 558-8585 (Japan)
2010-02-15T23:59:59.000Z
We theoretically study the internal Josephson effect, which is driven by spin-exchange interactions and magnetic dipole-dipole interactions, in a three-level system for spin-1 Bose-Einstein condensates, obtaining novel spin dynamics. We introduce single spatial mode approximations into the Gross-Pitaevskii equations and derive the Josephson-type equations, which are analogous to tunneling currents through three junctions between three superconductors. From an analogy with two interacting nonrigid pendulums, we identify unique varied oscillational modes, called the 0-{pi}, 0-running, running-running, 2n{pi} and running-2{pi}, single nonrigid pendulum, and two rigid pendulums phase modes. These Josephson modes in the three states are expected to be found in real atomic Bose gas systems.
Optical computing with soliton trains in Bose-Einstein condensates
Florian Pinsker
2014-11-18T23:59:59.000Z
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.
Dynamics of vortices in weakly interacting Bose-Einstein condensates
Alexander Klein; Dieter Jaksch; Yanzhi Zhang; Weizhu Bao
2007-10-03T23:59:59.000Z
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.
Bose Einstein condensation in a gas of the Fibonacci oscillators
Abdullah Algin
2008-10-10T23:59:59.000Z
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.
Bose-Einstein Condensates in the Large Gas Parameter Regime
A. Fabrocini; A. Polls
2001-01-25T23:59:59.000Z
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 $\\sim 40%$.
Detecting Beyond-Einstein Polarizations of Continuous Gravitational Waves
Maximiliano Isi; Alan J. Weinstein; Carver Mead; Matthew Pitkin
2015-03-30T23:59:59.000Z
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.
Detecting Beyond-Einstein Polarizations of Continuous Gravitational Waves
Isi, Maximiliano; Mead, Carver; Pitkin, Matthew
2015-01-01T23:59:59.000Z
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.
Test of the Stokes-Einstein relation in a two-dimensional Yukawa liquid
Bin Liu; J. Goree
2005-11-08T23:59:59.000Z
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.
Bernard Jancewicz
1998-07-17T23:59:59.000Z
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.
Distinguishing Flavor Non-universal Colorons from Z' Bosons at the LHC
R. Sekhar Chivukula; Pawin Ittisamai; Elizabeth H. Simmons
2015-02-17T23:59:59.000Z
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.
Sparks, Donald L.
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
5D Einstein-Maxwell solitons and concentric rotating dipole black rings
Stoytcho Yazadjiev
2008-05-12T23:59:59.000Z
We discuss the application of the solitonic techniques to the 5D Einstein-Maxwell gravity. As an illustration we construct an exact solution describing two concentric rotating dipole black rings. The properties of the solution are investigated.
Chikkatur, Ananth P., 1975-
2003-01-01T23:59:59.000Z
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 ...
Bose-Einstein condensates in optical lattices : the superfluid to Mott insulator phase transition
Mun, Jongchul
2008-01-01T23:59:59.000Z
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 ...
Ghost-Free Massive $f(R)$ Theories Modelled as Effective Einstein Spaces and Cosmic Acceleration
Sergiu I. Vacaru
2014-10-15T23:59:59.000Z
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.
Thermodynamics In Einstein equation, the energy momentum tensor of homogeneous, isotropic
Murayama, Hitoshi
Thermodynamics In Einstein equation, the energy momentum tensor of homogeneous, isotropic fluid using the 1st law of thermodynamics, T = (U/S)V . Since U = V is expressed in terms of the temperature
Conformally flat Einstein-Yang-Mills-Higgs solutions with spherical symmetry
Mondaini, R.P.; Santos, N.O.
1983-10-15T23:59:59.000Z
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.
Experiments with Bose-Einstein condensates in a double-well potential
Shin, Yong-Il
2006-01-01T23:59:59.000Z
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 ...
Evidence for a critical velocity in a Bose-Einstein condensed gas
C. Raman; M. Kohl; R. Onofrio; D. S. Durfee; C. E. Kuklewicz; Z. Hadzibabic; W. Ketterle
1999-09-07T23:59:59.000Z
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.
Evolution and dynamical properties of Bose-Einstein condensate dark matter stars
Eniko J. M. Madarassy; Viktor T. Toth
2014-12-22T23:59:59.000Z
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.
Exact convoluted solutions in higher-dimensional Einstein-Maxwell theory
A. M. Ghezelbash
2014-09-10T23:59:59.000Z
We construct two classes of exact solutions to six and higher dimensional Einstein-Maxwell theory in which the metric functions can be written as convolution-like integrals of two special functions. The solutions are regular everywhere and show a bolt structure on a single point in any dimensionality. Moreover, we find the exact nonstationary solutions to the Einstein-Maxwell theory with positive cosmological constant. We show that the cosmological solutions are expanding patches in asymptotically de Sitter spacetime.
Transition of a mesoscopic bosonic gas into a Bose-Einstein condensate
Alexej Schelle
2011-11-03T23:59:59.000Z
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.
Microsoft Word - March2014.docx
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
radioactivity with Nobel Prize-winning chemist Otto Hahn and later discovering nuclear fission. It was her revelation that led Albert Einstein to write his famous warning...
The White House's Week of Making | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
as advanced manufacturing and technology. Last year, the Energy Department's Albert Einstein Teaching Fellowship responded to the White House's Maker call to action by announcing...
COLLOQUIUM: "The Usefulness of Useless Knowledge": The History...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
research in the sciences and humanities. Diverse scholars including Albert Einstein, Erwin Panofsky, John von Neumann, J. Robert Oppenheimer, Freeman Dyson, Kurt Gdel,...
Einstein-Schrodinger theory in the presence of zero-point fluctuations
J. A. Shifflett
2007-04-13T23:59:59.000Z
The Einstein-Schrodinger theory is modified by adding a cosmological constant contribution caused by zero-point fluctuations. This cosmological constant which multiplies the symmetric metric is assumed to be nearly cancelled by Schrodinger's ``bare'' cosmological constant which multiplies the nonsymmetric fundamental tensor, such that the total ``physical'' cosmological constant matches measurement. We first derive the field equations of the theory from a Lagrangian density. We show that the divergence of the Einstein equations vanishes using the Christoffel connection formed from the symmetric metric, allowing additional fields to be included in the same manner as with ordinary general relativity. We show that the field equations match the ordinary electro-vac Einstein and Maxwell equations except for additional terms which are $Einstein-Infeld-Hoffmann (EIH) equations of motion for this theory match the equations of motion for Einstein-Maxwell theory to Newtonian/Coulombian order, which proves the existence of a Lorentz force. We derive an exact electric monopole solution, and show that it matches the Reissner-Nordstrom solution except for additional terms which are $\\sim10^{-66}$ of the usual terms for worst-case radii accessible to measurement. Finally, we show that the theory becomes exactly electro-vac Einstein-Maxwell theory in the limit as the cosmological constant from zero-point fluctuations goes to infinity.
Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate
G. Edward Marti; Ryan Olf; Dan M. Stamper-Kurn
2014-06-26T23:59:59.000Z
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.
The Einstein Equation on the 3-Brane World
Shiromizu, T; Sasaki, M; Shiromizu, Tetsuya; Maeda, Kei-ichi; Sasaki, Misao
2000-01-01T23:59:59.000Z
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...
Quantum dynamics of the Einstein-Rosen wormhole throat
Gabor Kunstatter; Jorma Louko; Ari Peltola
2011-02-26T23:59:59.000Z
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.
Quantum dynamics of the Einstein-Rosen wormhole throat
Kunstatter, Gabor; Peltola, Ari [Department of Physics and Winnipeg Institute for Theoretical Physics, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, R3B 2E9 (Canada); Louko, Jorma [School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD (United Kingdom)
2011-02-15T23:59:59.000Z
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, semiclassical wave packet. As expected from previous work on loop quantum cosmology, the wave packet remains semiclassical 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 semiclassical state at late times. The value of the minimum depends in a nontrivial 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 semiclassical 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.
Planck-scale effects on Bose-Einstein condensates
F. Briscese; M. Grether; M. de Llano
2012-06-20T23:59:59.000Z
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.
Hays, David C. [United States Army Corps of Engineers, Kansas City, Missouri, 64106 (United States)
2012-07-01T23:59:59.000Z
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)
Charged black holes in expanding Einstein-de Sitter universes
Manuela G. Rodrigues; Vilson T. Zanchin
2015-02-02T23:59:59.000Z
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.
Horizon structure of rotating Einstein-Born-Infeld black holes and shadow
Atamurotov, Farruh; Ahmedov, Bobomurat
2015-01-01T23:59:59.000Z
We investigate the horizon structure of the rotating Einstein-Born-Infeld solution which goes over to the Einstein-Maxwell's Kerr-Newman solution as the Born-Infeld parameter goes to infinity ($\\beta \\rightarrow \\infty$). We find that for a given $\\beta$, mass $M$ and charge $Q$, there exist critical spinning parameter $a_{E}$ and $r_{H}^{E}$, which corresponds to an extremal Einstein-Born-Infeld black hole with degenerate horizons, and $a_{E}$ decreases and $r_{H}^{E}$ increases with increase in the Born-Infeld parameter $\\beta$. While $aEinstein-Born-Infeld black hole with outer and inner horizons. Similarly, the effect of $\\beta$ on infinite redshift surface and in turn on ergoregion is also included. It is well known that a black hole can cast a shadow as an optical appearance due to its strong gravitational field. We also investigate the shadow cast by the non-rotating ($a=0$) Einstein-Born-Infeld black hole and demonstrate that the null geodesic equations can be integr...
Verification of exceptional points in the collapse dynamics of Bose-Einstein condensates
Jonas Brinker; Jacob Fuchs; Jörg Main; Günter Wunner; Holger Cartarius
2014-11-20T23:59:59.000Z
In Bose-Einstein condensates with an attractive contact interaction the stable ground state and an unstable excited state emerge in a tangent bifurcation at a critical value of the scattering length. At the bifurcation point both the energies and the wave functions of the two states coalesce, which is the characteristic of an exceptional point. In numerical simulations signatures of the exceptional point can be observed by encircling the bifurcation point in the complex extended space of the scattering length, however, this method cannot be applied in an experiment. Here we show in which way the exceptional point effects the collapse dynamics of the Bose-Einstein condensate. The harmonic inversion analysis of the time signal given as the spatial extension of the collapsing condensate wave function can provide clear evidence for the existence of an exceptional point. This method can be used for an experimental verification of exceptional points in Bose-Einstein condensates.
Einstein-Cartan formulation of Chern-Simons Lorentz-violating Gravity
Marcelo Botta Cantcheff
2008-07-18T23:59:59.000Z
We consider a modification of the standard Einstein theory in four dimensions, alternative to R. Jackiw and S.-Y. Pi, Phys. Rev. D 68, 104012 (2003), since it is based on the first-order (Einstein-Cartan) approach to General Relativity, whose gauge structure is manifest. This is done by introducing an additional topological term in the action which becomes a Lorentz-violating term by virtue of the dependence of the coupling on the space-time point. We obtain a condition on the solutions of the Einstein equations, such that they persist in the deformed theory, and show that the solutions remarkably correspond to the classical solutions of a collection of independent 2+1-d (topological) Chern-Simons gravities. Finally, we study the relation with the standard second-order approach and argue that they both coincide to leading order in the modulus of the Lorentz-violating vector field.
Observation of Fractional Stokes-Einstein Behavior in the Simplest Hydrogen-bonded Liquid
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
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.
Electrical effects in superfluid helium. I. Thermoelectric effect in Einstein's capacitor
Ledenyov, Viktor O; Ledenyov, Oleg P
2012-01-01T23:59:59.000Z
The Einstein's research ideas about the thermodynamical fluctuational nature of certain electrical phenomena [1] and the physical nature of the electric potentials difference U in an electric capacitor at the temperature of T [2] were proposed in 1906-1907. Exploring the Einstein's research ideas, we propose the consistent theoretical mechanism on the physical nature of the electric effects in an electric capacitor at an action of the second sound standing wave in the superfluid helium 4He [3] and in the rotational torsional mechanical resonator in the helium II [4]. The use of the Einstein's research approach, based on the consideration of an interconnection between the thermal, mechanical and electrical fluctuations, allows us to obtain the quantitative theoretical research results, which are in a good agreement with the experimental data on the correlations of the alternate low temperatures difference in the second sound wave, and the alternate electric potentials difference between the capacitor plates in...
Annual Security Report October 1, 2013
Yates, Andrew
® Annual Security Report October 1, 2013 Albert Einstein College of Medicine Jack & Pearl Resnick Campus Bronx, NY #12;2 | P a g e TABLE OF CONTENTS ABOUT THE ANNUAL SECURITY REPORT ................................................................................................4 MESSAGE FROM THE EINSTEIN SECURITY DEPARTMENT
Bose-Einstein correlations of neutral gauge bosons in $pp$ collisions
G. A. Kozlov
2008-01-15T23:59:59.000Z
The theory for Bose-Einstein correlations in case of neutral gauge bosons in $pp$ collisions at high energies is presented. Based on quantum field theory at finite temperature the two-particle Bose-Einstein correlations of neutral gauge bosons are carried out for the first time. As a result, the important parameters of the correlation functions can be obtained for the $Z^{0}Z^{0}$ pairs. The correlations of two bosons in 4-momentum space presented in this paper offer useful and instructive complimentary viewpoints to theoretical and experimental works in multiparticle femtoscopy and interferometry measurements at hadron colliders.
Exact solutions of three dimensional black holes: Einstein gravity vs F(R) gravity
S. H. Hendi; B. Eslam Panah; R. Saffari
2014-10-28T23:59:59.000Z
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.
Knot Topology of Vacuum Space-Time and Vacuum Decomposition of Einstein's Theory
Y. M. Cho; Franklin H. Cho
2011-10-28T23:59:59.000Z
Viewing Einstein's theory as the gauge theory of Lorentz group, we construct the most general vacuum connections which have vanishing curvature tensor and show that the vacuum space-time can be classified by the knot topology $\\pi_3(S^3)\\simeq \\pi_3(S^2)$ of $\\pi_3(SO(3,1))$. With this we obtain the gauge independent vacuum decomposition of Einstein's theory to the vacuum and gauge covariant physical parts. We discuss the physical implications of our result in quantum gravity.
The Second Law in 4D Einstein-Gauss-Bonnet Gravity
Saugata Chatterjee; Maulik Parikh
2015-01-21T23:59:59.000Z
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.
Manipulating Quantum States of Molecules Created via Photoassociation of Bose-Einstein Condensates
Xiao-Ting Zhou; Xiong-Jun Liu; Hui Jing; C. H. Lai; C. H. Oh
2007-01-14T23:59:59.000Z
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.
Bose-Einstein Condensation of Magnons under Incoherent Pumping A. V. Chumak,1,* G. A. Melkov,1
Demokritov, S.O.
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
Bao, Weizhu
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
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
BoseEinstein condensates in spatially periodic potentials Kirstine BergSrensen 1 and Klaus Mlmer 2
Berg-SÃ¸rensen, Kirstine
BoseÂEinstein condensates in spatially periodic potentials Kirstine BergÂSÃ¸rensen 1 and Klaus theoretically the properties of a BoseÂEinstein condensate located in a spatially periodic potential. The excitations of the condensate are obtained from linear equations involving the periodic potential
BoseEinstein condensates in spatially periodic potentials Kirstine BergSrensen 1 and Klaus Mlmer 2
Berg-SÃ¸rensen, Kirstine
BoseÂEinstein condensates in spatially periodic potentials Kirstine BergÂSÃ¸rensen 1 and Klaus BoseÂEinstein 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
ccsd-00005538,version2-12Nov2005 Observation of Phase Defects in Quasi-2D Bose-Einstein Condensates
Boyer, Edmond
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
arXiv:cond-mat/9904034v25Apr1999 Making, probing and understanding Bose-Einstein condensates
Hart, Gus
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
Gruner, Daniel S.
by distinguished faculty, many of whom hold joint appointments in Computer Science, Electrical and Computer, and over 400 workstations and PCs. Â· UMIACS' environment is enriched by a strong outreach program including, operating systems, and scientific computing Sponsored Research ANNUAL RESEARCH FUNDING $15 MILLION 3 #12
Duchowski, Andrew T.
. 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
Howat, Ian M.
Mosley-Thompson (9/19/2011) 1 Ellen Mosley-Thompson is a Distinguished University Professor://bprc.osu.edu/Icecore/vitae/emt_cv.pdf Short Vita (updated September 2011) ELLEN MOSLEY-THOMPSON Professor, Department of Geography Research Scientist, Byrd Polar Research Center thompson.4@osu.edu; phone 614-292-6662 DEGREES Ph.D., 1979, Geography
Computer Science Distinguished Lectures 2010-11 http://www.cs.iastate.edu/~colloq/new/dls.shtml
Mayfield, John
Computer Science Distinguished Lectures 2010-11 http relate these efforts to our NSF-sponsored IGERT PhD program in Computational Transportation Science. Ouri/pervasive computing. He received his B.A. degree in mathematics, and his Ph.D. degree in computer science from Courant
Reif, John H.
E. Allan Lind is the James L. Vincent Distinguished Professor of Leadership at the Fuqua School of Business, Duke University. Professor Lind's teaching interests center on leadership and global management, the Philippines and Japan. Professor Lind has consulted for GlaxoSmithKline, Micron Technologies, and the United
, 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
Kammen, Daniel M.
, including Newsweek, Time, The New York Times, The Guardian, and The Financial Times. Kammen has appearedDANIEL M. KAMMEN Dr. Kammen is the Class of 1935 Distinguished Professor of Energy at the University of California, Berkeley, with parallel appointments in the Energy and Resources Group, the Goldman
Sarkar, Nilanjan
, 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
Botea, Adi
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
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
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
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...
Matrix subdivision schemes Albert Cohen
Cohen, Albert
in the analysis of multivariate scalar schemes, in subdivision processes corresponding to shiftÂinvariant 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
Albert Polman Center for Nanophotonics
Polman, Albert
(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
Finite Element Wavelets Albert Cohen
Cohen, Albert
Andes A. A. 4976, Bogota, Colombia Qiyu Sun Center for Mathematical Sciences Zhejiang University. Let us simply mention that, in contrast to area such as statistical signal and image processing, where, as proposed in e.g. [1] or [7], exploits the well understood constructions of orthonormal or biorthogonal
Bose-Einstein condensation in dilute atomic gases1 Hans-Joachim Miesner and Wolfgang Ketterle
-8] contained a more complete account on the cooling and trapping techniques and described the progress during and observe nanokelvin samples of atoms. Keywords: Bose-Einstein condensation, optical cooling and trapping atoms by two to three orders of magnitude. The observation of BEC in such systems [1-3] has created