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: 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 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
Albert Einstein, 1905: Ein 3-Gange Menu
Buse, Karsten
Materie Dalton #12;· 1811 Avogadro: Gleiches Volumen f¨ur verschiedene Gase hat gleiche ZAHL von Atomen - Fl¨ussig, 1000x dichter, dichtgepackt · Atom-radius 10-10 meter · Einstein Avogadro #12;Kinetische
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 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. |
Office of Environmental Management (EM)
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Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
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Albert Einstein - Hanford Site
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Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
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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
Kunkle, Tom
Distinguished Barnes Elizabeth Pate Distinguished Barth Caitlin Elizabeth Distinguished Bartley Dylan Lake Becker-Krail Darius Demetrius Distinguished Bell Stephen Joseph Distinguished Benfield Katherine Distinguished Carey Caitlin Elizabeth Distinguished Carl Emma Leah Distinguished Carls
2010 Spring : Distinguished Honors Distinguished
Kunkle, Tom
Caitlin Alice Distinguished Barton Cory A Distinguished Bath Sean C Distinguished Beasley Elizabeth Lines Kaitlyn Distinguished Behrens Marissa Alison Distinguished Behringer Steven James Distinguished Bell Brant Caitlin Victoria Distinguished Breunsbach Jeffrey William Distinguished Brezina Sara Ann
2009 Fall : Distinguished Honors Distinguished
Kunkle, Tom
Bell Lorin Legene Distinguished Bellamy Kara Nicole Distinguished Benjamin Abigail Distinguished Bergman Kelsey Jean Distinguished Bettendorf Caitlin Marie Distinguished Bevacqua Kayla Marie Robyn Jane Distinguished Busby Caitlin McCushing Distinguished Buschur William H Distinguished Buskirk
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
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
2014 Fall : Distinguished Honors Distinguished
Kunkle, Tom
: Distinguished Honors LAST_NAME FIRST_NAME MIDDLE_NAME HONORS Barry Kendall Kathleen Distinguished Barth Caitlin Brielen Hunter Distinguished Beck Morgan Elyse Distinguished Bednar Alexander Barrett Distinguished Bell
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...
Einstein's View of God Nancy Ellen Abrams and Joel R. Primack
California at Santa Cruz, University of
Einstein's View of God Nancy Ellen Abrams and Joel R. Primack Did Albert Einstein believe in God way, they are part of a search that Einstein began Â the search for language to communicate the sacred, it was spiritually unacceptable to Einstein that the ultimate nature of reality was randomness. "The [quantum] theory
2012 Spring : Highly Distinguished Honors Highly Distinguished
Kunkle, Tom
Distinguished Bell Lauren Ashley Highly Distinguished Benjamin Abigail Highly Distinguished Benson Alexandrea Hannah Elizabeth Highly Distinguished Bishop Anna Laurel Highly Distinguished Black Caitlin Emily Highly
2014 Fall : Highly Distinguished Honors Highly Distinguished
Kunkle, Tom
Morgan Highly Distinguished Beech Kaylie Schaefer Highly Distinguished Bell Brandi Lakeisha Highly Distinguished Billard Caitlin Rose Highly Distinguished Birk Christian Gustave Highly Distinguished Birkhead
2011 Fall : Highly Distinguished Honors Highly Distinguished
Kunkle, Tom
Distinguished Beidler Katilyn V. Highly Distinguished Belanger Brett Russell Highly Distinguished Bell Lauren Ashley Highly Distinguished Bennett Caitlin Renee Highly Distinguished Berdusco Ann Marie Highly Highly Distinguished Bertel Jeffrey Robert Highly Distinguished Bettendorf Caitlin Marie 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
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
This article was downloaded by:[Newen, Albert] [Newen, Albert
Indiana University
Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK: http://www.informaworld.com/smpp/title~content=t713441835 Animal Minds and the Possession of Concepts To cite this Article: Newen, Albert and Bartels, Andreas , 'Animal Minds and the Possession of Concepts
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
Manhattan Project: Einstein's Letter, 1939
Office of Scientific and Technical Information (OSTI)
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ALBERT EINSTEIN COLLEGE OF MEDICINE COMMITTEE ON GRADUATE MEDICAL EDUCATION
Emmons, Scott
- Voluntary - Mandatory to include fitness for duty evaluations · End of rotation debriefing · Establish
Albert Einstein Alerts President Roosevelt of German Atomic Energy Program
National Nuclear Security Administration (NNSA)
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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 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.
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(?)
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.
STEM Mentoring Café- Engaging Young Women in an Authentic Mentoring...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Mentoring Experience Melinda Higgins Albert Einstein Distinguished Educator Fellow, NASA Office of Education, Headquarters and Goddard Space Flight Center It is a well-known...
Connecting the Classroom: Guiding Energy Educators | Department...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Energy Educators September 25, 2013 - 10:13am Addthis Josh Sneideman is an Albert Einstein Distinguished Educator Fellow and helps lead the Energy Department's Energy Literacy...
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.
Argerami, Martin
(Local and International Beers) Near the campus and the suggested hotels · Brewster's Brewing Co. & Restaurant, 4180 Albert Street. 522.2739 · Bonzinni's Brew Pub, 4634 Albert Street. 586.3553 · Triffon's Pizza, 1101 Kramer Boulevard. 584.0040 Downtown · Bushwakker Brewing Co. 2206 Dewdney Avenue. 359
LANL Distinguished Postdoc Fellows
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
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Termination Analysis of Java Bytecode Elvira Albert1
Arenas, Puri
program properties is often split into separately proving partial correctness and termination. ObjectTermination Analysis of Java Bytecode Elvira Albert1 , Puri Arenas1 , Michael Codish2 , Samir Abstract. Termination analysis has received considerable attention, traditionally in the context
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
.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
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
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
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
Albert R. Mann Library Government Information Policy and Procedure Manual
Angenent, Lars T.
code, regulations, and serve as a primary source of statistical data. Government information acquiredAlbert R. Mann Library Government Information Policy and Procedure Manual Table of Contents and damaged information Acquisitions Acquisitions activities 1. Item selection profile 2. Shipment delivery 3
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
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.
2015 Spring : Highly Distinguished Honors As of: Jun 12, 2015
Kunkle, Tom
Hunter Highly Distinguished Barry Madeline Regan Highly Distinguished Barth Caitlin Elizabeth Highly Garrett Robert Highly Distinguished Belcher Harlan Lloyd Highly Distinguished Bell Brandi Lakeisha Highly Distinguished Bell Stephen Joseph Highly Distinguished Bello Austin Tyler Highly Distinguished Bennett Meredith
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.
Greenslade, Diana
June 2015) · Flood Risk · Previous Flooding · Flood Forecasting · Local Information · Flood Warnings Flood Risk The Logan River has a catchment area of about 3850 square kilometres and lies in the south and Albert FLOOD WARNING SYSTEM for the LOGAN & ALBERT RIVERS This brochure describes the flood warning
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
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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP a gHigh4-FD-a <Alaska Underground Storage Tanks Website Jump to:Albany County,AlbemarleAlbert City,
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.
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 ...
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.
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.
West Virginia University 1 Distinguished Professors
Mohaghegh, Shahab
of Clinical Psychology · Eloise Elliott, The Ware Family Distinguished Professorship · Sanford Emery, RTF in Cardiology · Thomas Kammer, Eberly College Centennial Professor of Geology #12;2 Distinguished Professors Professor of Outstanding Teaching · Joyce E. McConnell, William J. Maier, Jr. Dean and Thomas R. Goodwin
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
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.
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.
JACK E. CERMAK University Distinguished Professor Emeritus
Connors, Daniel A.
JACK E. CERMAK University Distinguished Professor Emeritus 50 YEARS OF WIND ENGINEERING DEVELOPMENTS #12;The Beginning Colorado State University Wind Tunnel Constructed in 1949 Jack Cermak & BFarland Wind-chill Investigation of Artic Clothing for the Environmental Research Section, Department
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.
Colored HOMFLY polynomials can distinguish mutant knots
Satoshi Nawata; P. Ramadevi; Vivek Kumar Singh
2015-04-01T23:59:59.000Z
We illustrate from the viewpoint of braiding operations on WZNW conformal blocks how colored HOMFLY polynomials with multiplicity structure can detect mutations. As an example, we explicitly evaluate the (2,1)-colored HOMFLY polynomials that distinguish a famous mutant pair, Kinoshita-Terasaka and Conway knot.
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
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
COMPRESSED REMOTE SENSING OF SPARSE OBJECTS ALBERT C. FANNJIANG, PENGCHONG YAN, AND THOMAS STROHMER
Fannjiang, Albert
COMPRESSED REMOTE SENSING OF SPARSE OBJECTS ALBERT C. FANNJIANG, PENGCHONG YAN, AND THOMAS STROHMER sensing. By introducing the sensor as well as target ensembles, the maximum number of recoverable targets that in many imaging applications the targets are sparse in the sense that they typically occupy a small
Internet Protocol version 6 Overview* Albert Cabellos-Aparicio, Jordi Domingo-Pascual
PolitÃ¨cnica de Catalunya, Universitat
Internet Protocol version 6 Overview* Albert Cabellos-Aparicio, Jordi Domingo-Pascual Departament d stands for "Internet Protocol" and it was designed during the `70s with the purpose of interconnecting heterogeneous network technologies. IP was a huge success, and made it possible to create today's Internet
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
AlbertA Space program alberta Space program boundleSS opportunity
MacMillan, Andrew
AlbertA Space program alberta Space program boundleSS opportunity Alberta is a national leader in space sciences and that leadership starts at our universities. The Universities of Alberta, Calgary. Partnerships with Alberta's Universities will be key to leading future Alberta space innovation in the decades
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
Nuclear structure effects in light muonic atoms Krzysztof Pachucki and Albert Wienczek
Pachucki, Krzysztof
Nuclear structure effects in light muonic atoms Krzysztof Pachucki and Albert Wienczek Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland (Dated: April 28, 2015) Nuclear structure corrections to energy levels of light muonic atoms are derived with particu- lar attention to the nuclear mass
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
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.
Coarse-grained distinguishability of field interactions
Bény, Cédric
2015-01-01T23:59:59.000Z
Information-theoretical quantities such as statistical distinguishability typically result from optimisations over all conceivable observables. Physical theories, however, are not generally considered valid for all mathematically allowed measurements. For instance, quantum field theories are not meant to be correct or even consistent at arbitrarily small lengthscales. A general way of limiting such an optimisation to certain observables is to first coarse-grain the states by a quantum channel. We show how to calculate contractive quantum information metrics on coarse-grained equilibrium states of free bosonic systems (Gaussian states), in directions generated by arbitrary perturbations of the Hamiltonian. As an example, we study the Klein-Gordon field. If the phase-space resolution is coarse compared to h-bar, the various metrics become equal and the calculations simplify. In that context, we compute the scale dependence of the distinguishability of the quartic interaction.
Coarse-grained distinguishability of field interactions
Cédric Bény
2015-09-10T23:59:59.000Z
Information-theoretical quantities such as statistical distinguishability typically result from optimisations over all conceivable observables. Physical theories, however, are not generally considered valid for all mathematically allowed measurements. For instance, quantum field theories are not meant to be correct or even consistent at arbitrarily small lengthscales. A general way of limiting such an optimisation to certain observables is to first coarse-grain the states by a quantum channel. We show how to calculate contractive quantum information metrics on coarse-grained equilibrium states of free bosonic systems (Gaussian states), in directions generated by arbitrary perturbations of the Hamiltonian. As an example, we study the Klein-Gordon field. If the phase-space resolution is coarse compared to h-bar, the various metrics become equal and the calculations simplify. In that context, we compute the scale dependence of the distinguishability of the quartic interaction.
United states Department of the Interior, Oscar L. Chapman, Fish and fildl i fe Service , Albert f1 are equipped with motors with the propeller mounted on one side. Others have twin engines with propellers
Beigl, Michael
Typical Sensors needed in Ubiquitous and Pervasive Computing Michael Beigl, Albert Krohn, Tobias and presents an overview of their characteristics. Keywords: ubiquitous and pervasive computing, networked for networked embedded sensor systems, especially in ubiquitous and pervasive computing settings. Several
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
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.
Do open clusters have distinguishable chemical signatures?
Blanco-Cuaresma, S; Heiter, U
2015-01-01T23:59:59.000Z
Past studies have already shown that stars in open clusters are chemically homogeneous (e.g. De Silva et al. 2006, 2007 and 2009). These results support the idea that stars born from the same giant molecular cloud should have the same chemical composition. In this context, the chemical tagging technique was proposed by Freeman et al. 2002. The principle is to recover disrupted stellar clusters by looking only to the stellar chemical composition. In order to evaluate the feasibility of this approach, it is necessary to test if we can distinguish between stars born from different molecular clouds. For this purpose, we studied the chemical composition of stars in 32 old and intermediate-age open clusters, and we applied machine learning algorithms to recover the original cluster by only considering the chemical signatures.
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
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.
Entropic corrections to Einstein equations
Hendi, S. H. [Physics Department, College of Sciences, Yasouj University, Yasouj 75914 (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Sheykhi, A. [Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Department of Physics, Shahid Bahonar University, P.O. Box 76175-132, Kerman (Iran, Islamic Republic of)
2011-04-15T23:59:59.000Z
Considering the general quantum corrections to the area law of black hole entropy and adopting the viewpoint that gravity interprets as an entropic force, we derive the modified forms of Modified Newtonian dynamics (MOND) theory of gravitation and Einstein field equations. As two special cases we study the logarithmic and power-law corrections to entropy and find the explicit form of the obtained modified equations.
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 ...
INVERSE PROBLEMS FOR EINSTEIN MANIFOLDS 1. Introduction ...
2008-12-11T23:59:59.000Z
principle is that Einstein's equation becomes a non-linear elliptic system with real ...... manifolds with boundary, Communications in Analysis and Geometry 11 ...
Lanier, Clinton David
1994-01-01T23:59:59.000Z
comes from the Greek word paradoxon with the roots para, which means "contrary to, " and doza, which means "opinion. " To state it simply, paradox is defined as a statement which is contrary to accepted opinion. This simple definition has evolved over... valuable and enduring lessons. "' In 1914, Camus's father was drafted into the French army and was killed in the first battle of the Marne. Camus's mother moved herself and her two sons, Lucien, the eldest, and Albert, to the working-class district...
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.
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.
Local distinguishability with preservation of entanglement
Scott M. Cohen
2007-06-25T23:59:59.000Z
I consider deterministic distinguishability of a set of orthogonal, bipartite states when only a single copy is available and the parties are restricted to local operations and classical communication, but with the additional requirement that entanglement must be preserved in the process. Several general theorems aimed at characterizing sets of states with which the parties can succeed in such a task are proven. These include (1) a maximum for the number of states when the Schmidt rank of every outcome must be at least a given minimum; (2) an upper bound (equal to the dimension of Hilbert space if entanglement need not be preserved) for the sum over Schmidt ranks of the initial states when only one-way classical communication is allowed; and (3) separately, a necessary and a sufficient condition on the states such that their original Schmidt ranks can always be preserved. It is shown that our bound on the sum of Schmidt ranks can be exceeded if two-way communication is permitted, and this includes the case that entanglement need not be preserved, so that this sum can exceed the dimension of Hilbert space. Such questions, concerning how the various results are effected by the resources used by the parties are addressed for each theorem. This subject is closely related to the problem of locally purifying an entangled state from a mixed state, which is of direct relevance to teleportation and dense coding using a mixed-state resource. In an appendix, I give an extremely simple and transparent proof of "non-locality without entanglement", a phenomenon originally discussed by Bennett and co-workers several years ago.
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.
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.
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.
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.
Three Alumni Honored at Distinguished Alumni Awards Dinner in April
Simons, Jack
summer ahead of you as well! Sincerely, Cynthia J. Burrows Distinguished Professor and Chair Thatcher Presidential Endowed Chair of Biological Chemistry Dear Chemistry Friends and Families, Several women
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 &...
New Integral Distinguisher for Rijndael-256 Yuechuan Wei1
International Association for Cryptologic Research (IACR)
New Integral Distinguisher for Rijndael-256 Yuechuan Wei1 , Bing Sun2 and Chao Li1,2,3 1 School, integral attack, Rijndael-256 1 Introduction The known integral distinguishers of Rijndael-256 are based the square property which is byte-oriented[15, 7]. For example, the known 3-round integral distin- guisher
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
Davis, H. Floyd
A Low-Cost Quantitative Absorption Spectrophotometer Daniel R. Albert, Michael A. Todt, and H with spectrophotometry. Additionally, more than 75% of the high school teachers polled stated that the high cost of modern spectrophotometers was prohibitive for regular classroom use. The lowest-cost modern
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
Hurink, Johann
1 Islanded house operation using a micro CHP Albert Molderink, Vincent Bakker, Johann L. Hurink, The Netherlands email: a.molderink@utwente.nl Abstract-- The µCHP is expected as the successor of the conventional. A µCHP appliance saves money and reduces greenhouse gas emission. An additional functionality of the µCHP
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
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
Quantum Physics at the `Einstein meets Magritte' conference
Aerts, Diederik
Quantum Physics at the `Einstein meets Magritte' conference Diederik Aerts Center Leo Apostel at the international conference 'Einstein meets Magritte'. The meeting between Einstein and Magritte represented: Aerts, D., 1996, "Quantum physics at the Einstein meets Magritte confer- ence", Int. J. Theor. Phys., 35
REVIEW ARTICLE FOCUS BoseEinstein condensation in
Loss, Daniel
REVIEW ARTICLE FOCUS BoseEinstein condensation in magnetic insulators The BoseEinstein condensate-mail: thierry.giamarchi@physics.unige.ch; c.ruegg@ucl.ac.uk; olegt@jhu.edu Not long after Bose and Einstein . It is thus natural to ask whether these bosons can undergo Bose Einstein condensation and become superfluid
Stability of the Einstein static universe in Einstein-Cartan theory
Atazadeh, K., E-mail: atazadeh@azaruniv.ac.ir [Department of Physics, Azarbaijan Shahid Madani University, Tabriz, 53714-161 (Iran, Islamic Republic of)
2014-06-01T23:59:59.000Z
The existence and stability of the Einstein static solution have been built in the Einstein-Cartan gravity. We show that this solution in the presence of perfect fluid with spin density satisfying the Weyssenhoff restriction is cyclically stable around a center equilibrium point. Thus, study of this solution is interesting because it supports non-singular emergent cosmological models in which the early universe oscillates indeterminately about an initial Einstein static solution and is thus past eternal.
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 Biggest Blunder: A Cosmic Mystery Story
Krauss, Lawrence
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.
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.
Cerveny, Vlastislav
(Albert Einstein, Gerty and Carl Cori, Jaroslav Heyrovský), and remains an undisputed leader in Czech
Distinguishing exotic states from scattering states in lattice QCD
Sigaev, Dmitry
2008-01-01T23:59:59.000Z
This work explores the problem of distinguishing potentially interesting new exotic states in QCD from conventional scattering states using lattice QCD, and addresses the specific case of the search for localized resonances ...
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.
Multi-Photon Interference and Temporal Distinguishability of Photons
Z. Y. Ou
2007-08-24T23:59:59.000Z
A number of recent interference experiments involving multiple photons are reviewed. These experiments include generalized photon bunching effects, generalized Hong-Ou-Mandel interference effects and multi-photon interferometry for demonstrations of multi-photon de Broglie wavelength. The multi-photon states used in these experiments are from two pairs of photons in parametric down-conversion. We find that the size of the interference effect in these experiments, characterized by the visibility of interference pattern, is governed by the degree of distinguishability among different pairs of photons. Based on this discovery, we generalize the concept of multi-photon temporal distinguishability and relate it to a number of multi-photon interference effects. Finally, we make an attempt to interpret the coherence theory by the multi-photon interference via the concept of temporal distinguishability of photons.
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.
Understanding entanglement as resource: locally distinguishing unextendible product bases
Scott M. Cohen
2008-01-08T23:59:59.000Z
It is known that the states in an unextendible product basis (UPB) cannot be distinguished perfectly when the parties are restricted to local operations and classical communication (LOCC). Previous discussions of such bases have left open the following question: What entanglement resources are necessary and/or sufficient for this task to be possible with LOCC? In this paper, I present protocols which use entanglement more efficiently than teleportation to distinguish certain classes of UPB's. The ideas underlying my approach to this problem offer rather general insight into why entanglement is useful for such tasks.
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
BoseEinstein condensation of excitons in bilayer electron systems
Eisenstein, Jim
BoseEinstein condensation of excitons in bilayer electron systems J. P. Eisenstein1 * & A. H. Mac is represented by a wave that has both amplitude and phase. The most remarkable consequence of BoseEinstein cousins, any number of bosons can crowd into the same microscopic state. Indeed, Einstein predicted
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.
ROBERT E. MARC, PHD Distinguished Professor of Ophthalmology
Marc, Robert E.
ROBERT E. MARC, PHD Distinguished Professor of Ophthalmology University of Utah School of Medicine, Salt Lake City, UT 84132 robert.marc@hsc.utah.edu (801) 585-6500 EDUCATION 1971 BSc Honors, Univ Texas (Science, Nature, PNAS, PLoS Biology) SELECTED PUBLICATIONS Marc et al. 2012 Building retinal connectomes
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
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
A New Statistical Distinguisher for the Shrinking Generator
International Association for Cryptologic Research (IACR)
, the output sequences possess a long period, a high linear complexity, and good statistical properties. 1 #12 of the shrinking generator from a purely random sequence. 1 It is shown in [2] and [5] that the output sequence mayA New Statistical Distinguisher for the Shrinking Generator Jovan Dj. Goli#19;c and Renato
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
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
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
David B. Geohegan Distinguished R&D Staff
Pennycook, Steve
, nanoparticles, inorganic and organic nanowires. Laser interactions with materials for synthesis of Materials Science and Engineering 2006p Co-Chair, SPIE Photonics West Conference "Synthesis and PhotonicsDavid B. Geohegan Distinguished R&D Staff Center for Nanophase Materials Sciences Oak Ridge
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
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.
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.
Visibility bound caused by a distinguishable noise particle
Miroslav Gavenda; Lucie Celechovska; Jan Soubusta; Miloslav Dusek; Radim Filip
2011-03-11T23:59:59.000Z
We investigate how distinguishability of a "noise" particle degrades interference of the "signal" particle. The signal, represented by an equatorial state of a photonic qubit, is mixed with noise, represented by another photonic qubit, via linear coupling on the beam splitter. We report on the degradation of the "signal" photon interference depending on the degree of indistinguishability between "signal" and "noise" photon. When the photons are principally completely distinguishable but technically indistinguishable the visibility drops to the value 1/sqrt(2). As the photons become more indistinguishable the maximal visibility increases and reaches the unit value for completely indistinguishable photons. We have examined this effect experimentally using setup with fiber optics two-photon Mach-Zehnder interferometer.
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].
The Geroch group in Einstein spaces
Robert G. Leigh; Anastasios C. Petkou; P. Marios Petropoulos; Prasanta K. Tripathy
2015-06-17T23:59:59.000Z
Geroch's solution-generating method is extended to the case of Einstein spaces, which possess a Killing vector {{}and are thus asymptotically (locally) (anti-)de Sitter}. This includes the reduction to a three-dimensional coset space, the description of the dynamics in terms of a sigma-model and its transformation properties under the $SL(2,\\mathbb{R})$ group, and the reconstruction of new four-dimensional Einstein spaces. The detailed analysis of the space of solutions is performed using the Hamilton--Jacobi method in the instance where the three-dimensional coset space is conformal to $\\mathbb{R}\\times \\mathcal{S}_2$. The cosmological constant appears in this framework as a constant of motion and transforms under $SL(2,\\mathbb{R})$.
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.
Time Reversal of Bose-Einstein Condensates
Martin, J.; Georgeot, B.; Shepelyansky, D. L. [Laboratoire de Physique Theorique, Universite de Toulouse III, CNRS, 31062 Toulouse (France)
2008-08-15T23:59:59.000Z
Using Gross-Pitaevskii equation, we study the time reversibility of Bose-Einstein condensates (BEC) in kicked optical lattices, showing that in the regime of quantum chaos, the dynamics can be inverted from explosion to collapse. The accuracy of time reversal decreases with the increase of atom interactions in BEC, until it is completely lost. Surprisingly, quantum chaos helps to restore time reversibility. These predictions can be tested with existing experimental setups.
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.
The Semiclassical Einstein Equation on Cosmological Spacetimes
Daniel Siemssen
2015-03-06T23:59:59.000Z
The subject of this thesis is the coupling of quantum fields to a classical gravitational background in a semiclassical fashion. It contains a thorough introduction into quantum field theory on curved spacetime with a focus on the stress-energy tensor and the semiclassical Einstein equation. Basic notions of differential geometry, topology, functional and microlocal analysis, causality and general relativity will be summarised, and the algebraic approach to QFT on curved spacetime will be reviewed. Apart from these foundations, the original research of the author and his collaborators will be presented: Together with Fewster, the author studied the up and down structure of permutations using their decomposition into so-called atomic permutations. The relevance of these results to this thesis is their application in the calculation of the moments of quadratic quantum fields. In a work with Pinamonti, the author showed the local and global existence of solutions to the semiclassical Einstein equation in flat cosmological spacetimes coupled to a scalar field by solving simultaneously for the quantum state and the Hubble function in an integral-functional equation. The theorem is proved with a fixed-point theorem using the continuous functional differentiability and boundedness of the integral kernel of the integral-functional equation. In another work with Pinamonti the author proposed an extension of the semiclassical Einstein equations which couples the moments of a stochastic Einstein tensor to the moments of the quantum stress-energy tensor. In a toy model of a Newtonianly perturbed exponentially expanding spacetime it is shown that the quantum fluctuations of the stress-energy tensor induce an almost scale-invariant power spectrum for the perturbation potential and that non-Gaussianties arise naturally.
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.
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.
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,...
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
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
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.
An alternative derivation of Einstein's Doppler shift and aberration formulae
Jean Reignier
2009-02-06T23:59:59.000Z
I propose an alternative, purely kinematical, derivation of Einstein's Doppler formula. It is valid for periodic signals of any shape that propagate with the velocity of light. The formula is asymptotic in a parameter proportional to the relative variation of the distance source-receiver during one period. As a by-product, I also derive an alternative proof of Einstein's aberration formulae.
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 self-gravitating elastic bodies in Einstein gravity
Lars Andersson; Robert Beig; Bernd Schmidt
2009-01-12T23:59:59.000Z
We prove that given a stress-free elastic body there exists, for sufficiently small values of the gravitational constant, a unique static solution of the Einstein equations coupled to the equations of relativistic elasticity. The solution constructed is a small deformation of the relaxed configuration. This result yields the first proof of existence of static solutions of the Einstein equations without symmetries.
Distinguishing Spins in Decay Chains at the Large Hadron Collider
Christiana Athanasiou; Christopher G. Lester; Jennifer M. Smillie; Bryan R. Webber
2008-08-29T23:59:59.000Z
If new particles are discovered at the LHC, it will be important to determine their spins in as model-independent a way as possible. We consider the case, commonly encountered in models of physics beyond the Standard Model, of a new scalar or fermion $D$ decaying sequentially into other new particles $C,B,A$ via the decay chain $D\\to C q$, $C\\to B l^{near}$, $B\\to A l^{far}$, $l^{near}$ and $l^{far}$ being opposite-sign same-flavour charged leptons and $A$ being invisible. We compute the observable 2- and 3-particle invariant mass distributions for all possible spin assignments of the new particles, and discuss their distinguishability using a quantitative measure known as the Kullback-Leibler distance.
Newton to Einstein — dust to dust
Kopp, Michael; Uhlemann, Cora; Haugg, Thomas, E-mail: michael.kopp@physik.lmu.de, E-mail: cora.uhlemann@physik.lmu.de, E-mail: thomas.haugg@physik.lmu.de [Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilian University Munich, Theresienstr. 37, Munich, 80333 (Germany)
2014-03-01T23:59:59.000Z
We investigate the relation between the standard Newtonian equations for a pressureless fluid (dust) and the Einstein equations in a double expansion in small scales and small metric perturbations. We find that parts of the Einstein equations can be rewritten as a closed system of two coupled differential equations for the scalar and transverse vector metric perturbations in Poisson gauge. It is then shown that this system is equivalent to the Newtonian system of continuity and Euler equations. Brustein and Riotto (2011) conjectured the equivalence of these systems in the special case where vector perturbations were neglected. We show that this approach does not lead to the Euler equation but to a physically different one with large deviations already in the 1-loop power spectrum. We show that it is also possible to consistently set to zero the vector perturbations which strongly constrains the allowed initial conditions, in particular excluding Gaussian ones such that inclusion of vector perturbations is inevitable in the cosmological context. In addition we derive nonlinear equations for the gravitational slip and tensor perturbations, thereby extending Newtonian gravity of a dust fluid to account for nonlinear light propagation effects and dust-induced gravitational waves.
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.
Nonlinear interferometry with Bose-Einstein condensates
Tacla, Alexandre B. [Center for Quantum Information and Control, MSC 07-4220, University of New Mexico, Albuquerque, New Mexico 87131-0001 (United States); Boixo, Sergio [Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125 (United States); Datta, Animesh [Clarendon Laboratory, Department of Physics, University of Oxford, OX1 3PU (United Kingdom); Shaji, Anil [School of Physics, Indian Institute of Science Education and Research, College of Engineering Trivandrum Campus, Thiruvananthapuram, Kerala 695016 (India); Caves, Carlton M. [Center for Quantum Information and Control, MSC 07-4220, University of New Mexico, Albuquerque, New Mexico 87131-0001 (United States); School of Mathematics and Physics, University of Queensland, Brisbane, Queensland 4072 (Australia)
2010-11-15T23:59:59.000Z
We analyze a proposed experiment [Boixo et al., Phys. Rev. Lett. 101, 040403 (2008)] for achieving sensitivity scaling better than 1/N in a nonlinear Ramsey interferometer that uses a two-mode Bose-Einstein condensate (BEC) of N atoms. We present numerical simulations that confirm the analytical predictions for the effect of the spreading of the BEC ground-state wave function on the ideal 1/N{sup 3/2} scaling. Numerical integration of the coupled, time-dependent, two-mode Gross-Pitaevskii equations allows us to study the several simplifying assumptions made in the initial analytic study of the proposal and to explore when they can be justified. In particular, we find that the two modes share the same spatial wave function for a length of time that is sufficient to run the metrology scheme.
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.
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.
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,
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.
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.
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
Public Education Peter N. Nemetz
Phani, A. Srikantha
-61), lifelong adherents to Albert Einstein's Credo: "The striving after knowledge for its own sake, the love
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.
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 ...
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.
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 ...
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.
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...
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...
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.
Topography of FUS pathology distinguishes late-onset BIBD from aFTLD-U
2013-01-01T23:59:59.000Z
as: Lee et al. : Topography of FUS pathology distinguishesRESEARCH Open Access Topography of FUS pathologyregions. Conclusions: The topography of FUS pathology in
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)...
Integral Distinguishers for Reduced-round Riham AlTawy and Amr M. Youssef
International Association for Cryptologic Research (IACR)
Integral Distinguishers for Reduced-round Stribog Riham AlTawy and Amr M. Youssef Concordia as an asymmetric reply to the new SHA-3 selected by NIST. In this paper we investigate the structural integral, we present a forward and backward higher order integrals that can be used to distinguish 4 and 3
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
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.
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.
Shrestha, Uttam; Ruostekoski, Janne
2012-01-01T23:59:59.000Z
Two-species atomic Bose–Einstein condensates (BECs) exhibitof a two-species Bose–Einstein condensate in an opticalof a two-species Bose–Einstein condensate to an optical
Emergent quantum phases in a heteronuclear molecular Bose--Einstein condensate model
Melissa Duncan; Angela Foerster; Jon Links; Eduardo Mattei; Norman Oelkers; Arlei Prestes Tonel
2006-10-30T23:59:59.000Z
We study a three-mode Hamiltonian modelling a heteronuclear molecular Bose--Einstein condensate. Two modes are associated with two distinguishable atomic constituents, which can combine to form a molecule represented by the third mode. Beginning with a semi-classical analogue of the model, we conduct an analysis to determine the phase space fixed points of the system. Bifurcations of the fixed points naturally separate the coupling parameter space into different regions. Two distinct scenarios are found, dependent on whether the imbalance between the number operators for the atomic modes is zero or non-zero. This result suggests the ground-state properties of the model exhibit an unusual sensitivity on the atomic imbalance. We then test this finding for the quantum mechanical model. Specifically we use Bethe ansatz methods, ground-state expectation values, the character of the quantum dynamics, and ground-state wavefunction overlaps to clarify the nature of the ground-state phases. The character of the transition is smoothed due to quantum fluctuations, but we may nonetheless identify the emergence of a quantum phase boundary in the limit of zero atomic imbalance.
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...
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.
??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 ...
BoseEinstein Condensation in the Large Deviations Regime with Applications to Information
Merhav, Neri
BoseEinstein Condensation in the Large Deviations Regime with Applications to Information System(U) = lim M " - 1 M log Pr ( X i ni MU )# may exhibit phase transitions BoseEinstein condensation (BEC
Modelling Bose Einstein Correlations via Elementary Emitting Cells
Oleg Utyuzh; Grzegorz Wilk; Zbigniew Wlodarczyk
2007-04-24T23:59:59.000Z
We propose a method of numerical modeling Bose Einstein Correlations by using the notion of Elementary Emitting Cells (EEC). They are intermediary objects containing identical bosons and are supposed to be produced independently during the hadronization process. Only bosons in EEC, which represents a single quantum state here, are subjected to the effects of Bose-Einstein (BE) statistics, which forces them to follow a geometrical distribution. There are no such effects between particles from different EECs. We illustrate our proposition by calculating a representative number of typical distributions and discussing their sensitivity to EECs and their characteristics.
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.
The Einstein static universe in Scalar-Fluid theories
Boehmer, Christian G; Wright, Matthew
2015-01-01T23:59:59.000Z
A new Lagrangian framework has recently been proposed to describe interactions between relativistic perfect fluids and scalar fields. In this paper we investigate the Einstein static universe in this new class of theories, which have been named Scalar-Fluid theories. The stability of the static solutions to both homogeneous and inhomogeneous perturbations is analysed deriving the relevant cosmological perturbation equations at the linear order. We can find several configurations corresponding to an Einstein static universes which are stable against inhomogeneous perturbations, but unstable against homogeneous perturbations. This shows the possible applications of Scalar-Fluid theories to the inflationary emergent universe scenario.
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.
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
BoseEinstein condensation of quasi-equilibrium magnons at room temperature under pumping
Demokritov, S.O.
BoseEinstein condensation of quasi-equilibrium magnons at room temperature under pumping S. O BoseEinstein condensation1,2 is one of the most fascinating phenomena predicted by quantum mechanics momentum (bosons), if the particle density exceeds a critical value. To achieve BoseEinstein conden
Physica B 293 (2001) 283}288 Bose}Einstein condensation of noninteracting charged Bose gas
Bayindir, Mehmet
2001-01-01T23:59:59.000Z
Physica B 293 (2001) 283}288 Bose}Einstein condensation of noninteracting charged Bose gas of charged Bose particles. We conclude that Bose}Einstein condensation of the charged Bose gas occurs.75.Fi; 05.30.Jp; 67.40.Kh; 64.60.!i Keywords: Bose}Einstein condensation; External potentials; Density
A perturbative analysis of modulated amplitude waves in BoseEinstein condensates
Porter, Mason A.
A perturbative analysis of modulated amplitude waves in BoseEinstein condensates Mason A. Portera-temporal structures in nonlinear Schro¨dinger equations and thereby study the dynamics of quasi-one-dimensional BoseEinstein waves on their wave number. We also explore the band structure of BoseEinstein condensates in detail
Oscillations and interactions of dark and darkbright solitons in BoseEinstein
Loss, Daniel
ARTICLES Oscillations and interactions of dark and darkbright solitons in BoseEinstein in highly stable optically trapped 87 Rb BoseEinstein condensates. In particular, our detailed studies excitation in BoseEinstein condensates. Nowadays, solitons are a very active field of research in many areas
BoseEinstein condensation of atomic gases Frederic Chevy and Jean Dalibard
Dalibard, Jean
BoseEinstein condensation of atomic gases Fr´ed´eric Chevy and Jean Dalibard Laboratoire Kastler The discovery of the superfluid transition of liquid helium [1, 2] marked the first achievement of BoseEinstein, gaseous BoseEinstein condensates (BECs) discovered in 1995 after the development of laser cooling
Numerical analysis of BoseEinstein condensation in a three-dimensional harmonic oscillator potential
Ligare, Martin
Numerical analysis of BoseEinstein condensation in a three-dimensional harmonic oscillator 24 March 1997; accepted 12 May 1997 BoseEinstein condensation is the anomalous accumulation the conditions of the recent experiments achieving BoseEinstein condensation in laser-cooled alkali vapors
Toward a tomographic picture of a BoseEinstein Stefano Mancini
D'Ariano, Giacomo Mauro
Toward a tomographic picture of a BoseEinstein condensate Stefano Mancini Istituto Nazionale per 12, 2000 The possibilities of applying tomographic techniques to a BoseEinstein condensate have break- throughs in the evaporative cooling of dilute alkali gases allowed the generation of BoseEinstein
THREEPARTICLE BOSE--EINSTEIN CORRELATIONS a sensitive probe for Lund string fragmentation
Ringnér, Markus
THREEPARTICLE BOSE--EINSTEIN CORRELATIONS a sensitive probe for Lund string fragmentation M with respect to the jet axis in e + e \\Gamma annihilation, arises naturally in a model for BoseEinstein , and is a description of some features of the model for Bose--Einstein (BE) correlations developed in 2 (an extension
Residual BoseEinstein Correlations in Inclusive + \\Gamma Systems and the ae(770) 0 Line
Residual BoseEinstein Correlations in Inclusive ß + ß \\Gamma Systems and the ae(770) 0 Line Shape of multihadronic Z 0 decay, BoseEinstein correlations acting between identical pions may have significant indirect on experimental studies of BoseEinstein correlations, particularly with regard to the use of ß + ß \\Gamma
Paris-Sud XI, Université de
Information Systems-- Animations Artificial, augmented, and virtual realities Keywords: Human Motions performing various interactions in VE. Animating virtual humans to perform these tasks involves taking manyCan We Distinguish Biological Motions of Virtual Humans? Perceptual Study With Captured Motions
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...
Journal of Economic Perspectives--Volume5,Number 1--Winter 1991--Pages 171179 Distinguished Fellow
Tesfatsion, Leigh
Journal of Economic Perspectives--Volume5,Number 1--Winter 1991--Pages 171179 Distinguished Fellow in · Harold W. Watts is Professor of Economics, Columbia University, New York, New York. #12;172 Journal
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.
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.
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.
Hamilton-Jacobi Counterterms for Einstein-Gauss-Bonnet Gravity
James T. Liu; Wafic A. Sabra
2008-07-08T23:59:59.000Z
The on-shell gravitational action and the boundary stress tensor are essential ingredients in the study of black hole thermodynamics. We employ the Hamilton-Jacobi method to calculate the boundary counterterms necessary to remove the divergences and allow the study of the thermodynamics of Einstein-Gauss-Bonnet black holes.
Historical Approach to Physics according to Kant, Einstein, and Hegel
Kim, Y S
2013-01-01T23:59:59.000Z
It is known that Einstein's conceptual base for his theory of relativity was the philosophy formulated by Immanuel Kant. Things appear differently to observers in different frames. However, Kant's Ding-an-Sich leads to the existence of the absolute reference frame which is not acceptable in Einstein's theory. It is possible to avoid this conflict using the ancient Chinese philosophy of Taoism where two different views can co-exist in harmony. This is not enough to explain Einstein's discovery of the mass-energy relation. The energy-momentum relations for slow and ultra-fast particles take different forms. Einstein was able to synthesize these two formulas to create his energy-mass relation. Indeed, this is what Hegelianism is about in physics. Isaac Newton synthesized open orbits for comets and closed orbits for planets to create his second law of motion. Maxwell combined electricity and magnetism to create his four equations to the present-day wireless world. In order to synthesize wave and particle views of...
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
July 12, 2007 Einstein's Miraculous Argument of 1905
signature of a microscopic energy distribution of independent, spatially localized components. The content century physics, the wave theory of light and its accommodation in electrodynamics. However the methods. In his statistical work of 1905, Einstein dealt with several thermal systems consisting of many
What Is the Largest Einstein Radius in the Universe?
Oguri, Masamune; Blandford, Roger D.
2008-08-05T23:59:59.000Z
The Einstein radius plays a central role in lens studies as it characterizes the strength of gravitational lensing. In particular, the distribution of Einstein radii near the upper cutoff should probe the probability distribution of the largest mass concentrations in the universe. Adopting a triaxial halo model, we compute expected distributions of large Einstein radii. To assess the cosmic variance, we generate a number of Monte-Carlo realizations of all-sky catalogues of massive clusters. We find that the expected largest Einstein radius in the universe is sensitive to parameters characterizing the cosmological model, especially {sigma}{sub s}: for a source redshift of unity, they are 42{sub -7}{sup +9}, 35{sub -6}{sup +8}, and 54{sub -7}{sup +12} arcseconds (errors denote 1{sigma} cosmic variance), assuming best-fit cosmological parameters of the Wilkinson Microwave Anisotropy Probe five-year (WMAP5), three-year (WMAP3) and one-year (WMAP1) data, respectively. These values are broadly consistent with current observations given their incompleteness. The mass of the largest lens cluster can be as small as {approx} 10{sup 15} M{sub {circle_dot}}. For the same source redshift, we expect in all-sky {approx} 35 (WMAP5), {approx} 15 (WMAP3), and {approx} 150 (WMAP1) clusters that have Einstein radii larger than 2000. For a larger source redshift of 7, the largest Einstein radii grow approximately twice as large. While the values of the largest Einstein radii are almost unaffected by the level of the primordial non-Gaussianity currently of interest, the measurement of the abundance of moderately large lens clusters should probe non-Gaussianity competitively with cosmic microwave background experiments, but only if other cosmological parameters are well-measured. These semi-analytic predictions are based on a rather simple representation of clusters, and hence calibrating them with N-body simulations will help to improve the accuracy. We also find that these 'superlens' clusters constitute a highly biased population. For instance, a substantial fraction of these superlens clusters have major axes preferentially aligned with the line-of-sight. As a consequence, the projected mass distributions of the clusters are rounder by an ellipticity of {approx} 0.2 and have {approx} 40%-60% larger concentrations compared with typical clusters with similar redshifts and masses. We argue that the large concentration measured in A1689 is consistent with our model prediction at the 1.2{sigma} level. A combined analysis of several clusters will be needed to see whether or not the observed concentrations conflict with predictions of the at {Lambda}-dominated cold dark matter model.
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
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
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
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.
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.
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.
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.
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
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.
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
Foreword The field of BoseEinstein condensation in atomic gases has been full of sur- prises. What happened after the first realization of BoseEinstein condensates in 1995 has far exceeded the vision of their creators. Originally, I expected interesting studies of equilibrium properties and dynamics, but the Bose
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.
A Hamiltonian functional for the linearized Einstein vacuum field equations
R. Rosas-Rodriguez
2005-07-26T23:59:59.000Z
By considering the Einstein vacuum field equations linearized about the Minkowski metric, the evolution equations for the gauge-invariant quantities characterizing the gravitational field are written in a Hamiltonian form by using a conserved functional as Hamiltonian; this Hamiltonian is not the analog of the energy of the field. A Poisson bracket between functionals of the field, compatible with the constraints satisfied by the field variables, is obtained. The generator of spatial translations associated with such bracket is also obtained.
Time-Periodic Solutions of the Einstein's Field Equations II
De-Xing Kong; Kefeng Liu; Ming Shen
2008-07-31T23:59:59.000Z
In this paper, we construct several kinds of new time-periodic solutions of the vacuum Einstein's field equations whose Riemann curvature tensors vanish, keep finite or take the infinity at some points in these space-times, respectively. The singularities of these new time-periodic solutions are investigated and some new physical phenomena are found. The applications of these solutions in modern cosmology and general relativity can be expected.
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.
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.
On the Bartnik conjecture for the static vacuum Einstein equations
Anderson, Michael T
2015-01-01T23:59:59.000Z
We prove that given any smooth metric $\\gamma$ and smooth positive function $H$ on $S^{2}$, there is a constant $\\lambda > 0$, depending on $(\\gamma, H)$, and an asymptotically flat solution $(M, g, u)$ of the static vacuum Einstein equations on $M = {\\mathbb R}^{3} \\setminus B^{3}$, such that the induced metric and mean curvature of $(M, g, u)$ at $\\partial M$ are given by $(\\gamma, \\lambda H)$. This gives a partial resolution of a conjecture of Bartnik.
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.
Formation of molecules in an expanding Bose-Einstein condensate
V. A. Yurovsky; A. Ben-Reuven
2004-02-12T23:59:59.000Z
A mean field theory of expanding hybrid atom-molecule Bose-Einstein condensates is applied to the recent MPI experiments on ${}^{87}$Rb that demonstrated the formation of ultracold molecules due to Feshbach resonance. The subsequent dissociation of the molecules is treated using a non-mean-field parametric approximation. The latter method is also used in determining optimal conditions for the formation of molecular BEC
Geometry and experience: Einstein's 1921 paper and Hilbert's axiomatic system
De Gandt, Francois [Universite Lille III, UMR 8163 'Savoirs et Textes', BP 60149, 59653 Villeneuve d'Ascq (France)
2006-06-19T23:59:59.000Z
In his 1921 paper Geometrie und Erfahrung, Einstein decribes the new epistemological status of geometry, divorced from any intuitive or a priori content. He calls that 'axiomatics', following Hilbert's theoretical developments on axiomatic systems, which started with the stimulus given by a talk by Hermann Wiener in 1891 and progressed until the Foundations of geometry in 1899. Difficult questions arise: how is a theoretical system related to an intuitive empirical content?.
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.
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.
Albert, Réka
;#12;#12;#12;Vertex Pre Post a 1 8 b 2 7 c 3 6 d 4 2 e 5 1 f 6 4 g 7 3 h 8 5 #12;Properties of DFS trees for a link Pre Post a 1 8 b 2 7 e 3 6 g 4 5 c 5 4 h 6 3 d 7 2 f 8 1 #12;Properties of BFS traversal Corresponds the depth first search on its reverse and compute the post-order numbering. Then run the search again
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
CUNY Thermal Energy Storage Global Energy Solution DISTINGUISHED PROFESSOR EMERITUS REUEL SHINNAR
Wolberg, George
emission reduced ·Cost-effective ·Much lower cost vs. building new power plant or using any other storage output ·Lower $/KWh cost vs. Molten Salt ·No water use ·Modular design & easier field assembly Biography Principal Innovator: Reuel Shinnar, distinguished Professor (Emeritus) of Chemical Engineering at City
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
Detailed balance in micro-and macrokinetics and micro-distinguishability of macro-processes
Detailed balance in micro- and macrokinetics and micro-distinguishability of macro-processes A. N a general framework for the discussion of detailed balance and analyse its microscopic background. We find of detailed balance. Keywords: kinetic equation, random process, microreversibility, detailed balance
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
Joel R. Primack Distinguished Professor of Physics, University of California, Santa Cruz
California at Santa Cruz, University of
-11. American Physical Society activities (partial list): Executive Committee, APS Division of Astrophysics and Funding for Astrophysics 2004; Chair, APS Forum on Physics and Society 2005; Chair, APS Sakharov PrizeJoel R. Primack Distinguished Professor of Physics, University of California, Santa Cruz Office
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
civil and environmental engineering department presents 2013 Kirlin Distinguished Speaker Series
Aydilek, Ahmet
civil and environmental engineering department presents 2013 Kirlin Distinguished Speaker Series Dr of the Departments of Civil and Environmental Engineering and Geological Engineering. Dr. Benson has a BS from Lehigh of Sustainability University of Wisconsin- Madison Dr. Craig H. Benson is an international expert in environmental
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.
Einstein's Dream of Unified Forces | U.S. DOE Office of Science...
Office of Science (SC) Website
Since Einstein, physicists have sought a unified theory to explain all the fundamental forces and particles in the universe. The result is a stunningly successful theory that...
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
Einstein's Dream of Unified Forces | U.S. DOE Office of Science...
Office of Science (SC) Website
Einstein's Dream of Unified Forces High Energy Physics (HEP) HEP Home About Research Science Drivers of Particle Physics Energy Frontier Intensity Frontier Cosmic Frontier...
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
Quasi-Nambu-Goldstone Modes in Bose-Einstein Condensates
Uchino, Shun [Department of Physics, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033 (Japan); Kobayashi, Michikazu [Department of Basic Science, University of Tokyo, 3-8-1 Komaba, Tokyo 153-8902 (Japan); Nitta, Muneto [Department of Physics, and Research and Education Center for Natural Sciences, Keio University, 4-1-1 Hiyoshi, Kanagawa 223-8521 (Japan); Ueda, Masahito [Department of Physics, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033 (Japan); ERATO Macroscopic Quantum Project, JST, Tokyo 113-8656 (Japan)
2010-12-03T23:59:59.000Z
We show that quasi-Nambu-Goldstone (NG) modes, which play prominent roles in high energy physics but have been elusive experimentally, can be realized with atomic Bose-Einstein condensates. The quasi-NG modes emerge when the symmetry of a ground state is larger than that of the Hamiltonian. When they appear, the conventional vacuum manifold should be enlarged. Consequently, topological defects that are stable within the conventional vacuum manifold become unstable and decay by emitting the quasi-NG modes. Contrary to conventional wisdom, however, we show that the topological defects are stabilized by quantum fluctuations that make the quasi-NG modes massive, thereby suppressing their emission.
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.
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.
Bose-Einstein Condensation of Dark Matter Axions
P. Sikivie; Q. Yang
2009-09-02T23:59:59.000Z
We show that cold dark matter axions thermalize and form a Bose-Einstein condensate. 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 non-linear 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.
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.
Electrical charges in gravitational fields, and Einstein's equivalence principle
Gerold Gründler
2015-10-06T23:59:59.000Z
According to Larmor's formula, accelerated electric charges radiate electromagnetic waves. Hence charges should radiate, if they are in free fall in gravitational fields, and they should not radiate if they are supported at rest in gravitational fields. But according to Einstein's equivalence principle, charges in free fall should not radiate, while charges supported at rest in gravitational fields should radiate. In this article we point out indirect experimental evidence, indicating that the equivalence principle is correct, while Larmor's formula must be interpreted different than commonly accepted.
Conformastationary disk-haloes in Einstein-Maxwell gravity
Antonio C. Gutiérrez-Piñeres
2015-04-14T23:59:59.000Z
An exact solution of the Einstein-Maxwell field equations for a conformastationary metric with magnetized disk-haloes sources is worked out in full. The characterization of the nature of the energy momentum tensor of the source is discussed. All the expressions are presented in terms of a solution of the Laplace's equation. A "generalization" of the Kuzmin solution of the Laplace's equations is used as a particular example. The solution obtained is asymptotically flat in general and turns out to be free of singularities. All the relevant quantities show a reasonable physical behaviour.
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.
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
On the curvature of Einstein-Hermitian surfaces
Mustafa Kalafat; Caner Koca
2014-10-19T23:59:59.000Z
We give a mathematical exposition of the Page metric and introduce an efficient coordinate system for it. We carefully examine the submanifolds of the underlying smooth manifold and show that it does not have positive holomorphic bisectional curvature. We also reprove that a compact complex surface together with an Einstein-Hermitian metric of positive orthogonal bisectional curvature is biholomorphically isometric to the complex projective plane with its Fubini-Study metric up to rescaling. This result relaxes the K\\"ahler condition in Berger's theorem, and the positivity condition on sectional curvature in a theorem proved by Koca.
Static Einstein-Maxwell Solutions in 2+1 dimensions
Mauricio Cataldo; Patricio Salgado
1996-05-22T23:59:59.000Z
We obtain the Einstein-Maxwell equations for (2+1)-dimensional static space-time, which are invariant under the transformation $q_0=i\\,q_2,q_2=i\\,q_0,\\alpha \\rightleftharpoons \\gamma$. It is shown that the magnetic solution obtained with the help of the procedure used in Ref.~\\cite{Cataldo}, can be obtained from the static BTZ solution using an appropriate transformation. Superpositions of a perfect fluid and an electric or a magnetic field are separately studied and their corresponding solutions found.
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.
Jennifer M. Smillie; Bryan R. Webber
2007-02-21T23:59:59.000Z
An interesting alternative to supersymmetry (SUSY) for extending physics beyond the Standard Model is a model with universal extra dimensions (UED), in which the SUSY superpartners are replaced by Kaluza-Klein excitations of the Standard Model particles. If new particles are discovered at the LHC, even if their mass spectrum favours SUSY or UED, it will be vital to distinguish between their spin assignments in the two models as far as possible. We extend the method proposed by Barr [hep-ph/0405052] to the UED case and investigate the angular and charge asymmetries of decay distributions for sample mass spectra of both SUSY and UED types. For hierarchical (`SUSY-type') mass spectra there is a good chance of distinguishing the spin structures of the two models. However, a mass spectrum of the quasi-degenerate type expected in UED would make it difficult to observe spin correlations.
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.
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...
Boyer, Edmond
The 2nd order coherence of superradiance from a BoseEinstein condensate R. Lopes, A. Imanaliev, M have measured the 2-particle correlation function of atoms from a BoseEinstein condensate
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.
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.
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.
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.
Breakdown of the Stokes-Einstein Relation in Supercooled Water
Pradeep Kumar; S. V. Buldyrev; S. R. Becker; P. H. Poole; F. W. Starr; H. E. Stanley
2007-02-06T23:59:59.000Z
Supercooled water exhibits a breakdown of the Stokes-Einstein relation between the diffusion constant $D$ and the alpha relaxation time $\\tau_{\\alpha}$. For water simulated with the TIP5P and ST2 potentials, we find that the temperature of the decoupling of diffusion and alpha relaxation correlates with the temperature of the maximum in specific heat that corresponds to crossing the Widom line $T_W(P)$. Specifically, we find that our results for $D\\tau_{\\alpha}/T$ collapse onto a single master curve if temperature is replaced by $T-T_W(P)$, where $T_W(P)$ is the temperature where the constant-pressure specific heat achieves a maximum. Also, we find agreement between our ST2 simulations and experimental values of $D\\tau_{\\alpha}/T$. We further find that the size of the mobile molecule clusters (dynamical heterogeneities) increases sharply near $T_W(P)$. Moreover, our calculations of mobile particle cluster size $_w$ for different pressures, where $t^*$ is the time for which the mobile particle cluster size is largest, also collapse onto a single master curve if $T$ is replaced by $T-T_W(P)$. The crossover to a more locally structured low density liquid (LDL) environment as $T\\to T_W(P)$ appears to be well correlated with both the breakdown of the Stokes-Einstein relation and the growth of dynamic heterogeneities.
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.
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
On the m t dependence of the BoseEinstein effect Raluca Muresan a , Oxana Smirnova b , Bengt Lorstad
Smirnova, Oxana
On the m t dependence of the BoseEinstein effect Raluca Mure¸san a , Oxana Smirnova b , Bengt L)1997 Abstract A study of the BoseEinstein correlation function for JETSET 7.4 generated data is performed. Two the string decay and pions from the resonance decays. The dependence of the shape of the output BoseEinstein
Recanati, Catherine
A finite element method with mesh adaptivity for computing vortex states in fastrotating BoseEinstein Abstract Numerical computations of stationary states of fastrotating BoseEinstein condensates require rotation rates). Key words: Gross--Pitaevskii equation, finite element method, mesh adaptivity, BoseEinstein
Smillie, Jennifer M; Webber, Bryan R
ar X iv :h ep -p h/ 05 07 17 0v 3 2 1 Fe b 20 07 Preprint typeset in JHEP style - PAPER VERSION Cavendish–HEP–05/11 Distinguishing Spins in Supersymmetric and Universal Extra Dimension Models at the Large Hadron Collider? Jennifer M. Smillie1... lepton mass distribution 8 4.6 Observable quark-lepton correlations 9 5. Production cross sections 11 6. Experimental observables 13 7. Conclusions 15 A. Quark + far lepton correlation 16 B. UED production cross sections 17 1. Introduction The search...
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.
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.
Atomic quantum corrals for Bose-Einstein condensates
Xiong Hongwei [State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences, Beijing 100190 (China); Wu Biao [Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences, Beijing 100190 (China); International Center for Quantum Materials, Peking University, Beijing 100871 (China); Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2010-11-15T23:59:59.000Z
We consider the dynamics of Bose-Einstein condensates in a corral-like potential. Compared to the electronic quantum corrals, the atomic quantum corrals have the advantages of allowing direct and convenient observation of the wave dynamics, together with adjustable interaction strength. Our numerical study shows that these advantages not only allow exploration of the rich dynamical structures in the density distribution but also make the corrals useful in many other aspects. In particular, the corrals for atoms can be arranged into a stadium shape for the experimental visualization of quantum chaos, which has been elusive with electronic quantum corrals. The density correlation is used to describe quantitatively the dynamical quantum chaos. Furthermore, we find that the interatomic interaction can greatly enhance the dynamical quantum chaos, for example, inducing a chaotic behavior even in circle-shaped corrals.
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.
Bose-Einstein condensation as an alternative to inflation
Das, Saurya
2015-01-01T23:59:59.000Z
It was recently shown that gravitons with a very small mass should have formed a Bose-Einstein condensate in the very early Universe, whose density and quantum potential can account for the dark matter and dark energy in the Universe respectively. Here we show that the condensation can also naturally explain the observed large scale homogeneity and isotropy of the Universe. Furthermore gravitons continue to fall into their ground state within the condensate at every epoch, accounting for the observed flatness of space at cosmological distances scales. Finally, we argue that the density perturbations due to quantum fluctuations within the condensate give rise to a scale invariant spectrum. This therefore provides a viable alternative to inflation, which is not associated with the well-known problems associated with the latter.
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.
The Einstein-Podolsky-Rosen Argument and the Bell Inequalities
Szabo, Laszlo E
2007-01-01T23:59:59.000Z
In 1935 Einstein, Podolsky, and Rosen (EPR) published an important paper in which they claimed that the whole formalism of quantum mechanics together with what they called "Reality Criterion" imply that quantum mechanics cannot be complete. That is, there must exist some elements of reality that are not described by quantum mechanics. There must be, they concluded, a more complete description of physical reality behind quantum mechanics. There must be a state, a hidden variable, characterizing the state of affairs in the world in more details than the quantum mechanical state, something that also reflects the missing elements of reality. Under some further but quite plausible assumptions, this conclusion implies that in some spin-correlation experiments the measured quantum mechanical probabilities should satisfy particular inequalities (Bell-type inequalities). The paradox consists in the fact that quantum probabilities do not satisfy these inequalities. And this paradoxical fact has been confirmed by severa...
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.
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.
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.
Neural networks using two-component Bose-Einstein condensates
Tim Byrnes; Shinsuke Koyama; Kai Yan; Yoshihisa Yamamoto
2012-11-16T23:59:59.000Z
The authors previously considered a method solving optimization problems by using a system of interconnected network of two component Bose-Einstein condensates (Byrnes, Yan, Yamamoto New J. Phys. 13, 113025 (2011)). The use of bosonic particles was found to give a reduced time proportional to the number of bosons N for solving Ising model Hamiltonians by taking advantage of enhanced bosonic cooling rates. In this paper we consider the same system in terms of neural networks. We find that up to the accelerated cooling of the bosons the previously proposed system is equivalent to a stochastic continuous Hopfield network. This makes it clear that the BEC network is a physical realization of a simulated annealing algorithm, with an additional speedup due to bosonic enhancement. We discuss the BEC network in terms of typical neural network tasks such as learning and pattern recognition and find that the latter process may be accelerated by a factor of N.
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.
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 $\\sim 40%$.
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.
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.
COLLOQUIUM: "The Usefulness of Useless Knowledge": The History...
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research in the sciences and humanities. Diverse scholars including Albert Einstein, Erwin Panofsky, John von Neumann, J. Robert Oppenheimer, Freeman Dyson, Kurt Gdel,...
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...
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.
Static self-gravitating many-body systems in Einstein gravity
Lars Andersson; Berndt G. Schmidt
2009-05-08T23:59:59.000Z
We consider the problem of constructing static, elastic, many-body systems in Einstein gravity. The solutions constructed are deformations of static many-body configurations in Newtonian gravity. No symmetry assumptions are made.
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 ...
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 ...
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
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.
Addendum to "Distinguishing Spins in Decay Chains at the Large Hadron Collider"
Christiana Athanasiou; Christopher G. Lester; Jennifer M. Smillie; Bryan R. Webber
2006-06-20T23:59:59.000Z
We extend our earlier study of spin correlations in the decay chain $D\\to C q$, $C\\to B l^{near}$, $B\\to A l^{far}$, where $A,B,C,D$ are new particles with known masses but undetermined spins, $l^{near}$ and $l^{far}$ are opposite-sign same-flavour charged leptons and $A$ is invisible. Instead of looking at the observable 2- and 3-particle invariant mass distributions separately, we compare the full three-dimensional phase space distributions for all possible spin assignments of the new particles, and show that this enhances their distinguishability using a quantitative measure known as the Kullback-Leibler distance.
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.
Testing outer boundary treatments for the Einstein equations
Oliver Rinne; Lee Lindblom; Mark A. Scheel
2007-07-25T23:59:59.000Z
Various methods of treating outer boundaries in numerical relativity are compared using a simple test problem: a Schwarzschild black hole with an outgoing gravitational wave perturbation. Numerical solutions computed using different boundary treatments are compared to a `reference' numerical solution obtained by placing the outer boundary at a very large radius. For each boundary treatment, the full solutions including constraint violations and extracted gravitational waves are compared to those of the reference solution, thereby assessing the reflections caused by the artificial boundary. These tests use a first-order generalized harmonic formulation of the Einstein equations. Constraint-preserving boundary conditions for this system are reviewed, and an improved boundary condition on the gauge degrees of freedom is presented. Alternate boundary conditions evaluated here include freezing the incoming characteristic fields, Sommerfeld boundary conditions, and the constraint-preserving boundary conditions of Kreiss and Winicour. Rather different approaches to boundary treatments, such as sponge layers and spatial compactification, are also tested. Overall the best treatment found here combines boundary conditions that preserve the constraints, freeze the Newman-Penrose scalar Psi_0, and control gauge reflections.
Emergent gravitational dynamics in relativistic Bose--Einstein condensate
Alessio Belenchia; Stefano Liberati; Arif Mohd
2014-10-22T23:59:59.000Z
Analogue models of gravity have played a pivotal role in the past years by providing a test bench for many open issues in quantum field theory in curved spacetime such as the robustness of Hawking radiation and cosmological particle production. More recently, the same models have offered a valuable framework within which current ideas about the emergence of spacetime and its dynamics could be discussed via convenient toy models. In this context, we study here an analogue gravity system based on a relativistic Bose--Einstein condensate. We show that in a suitable limit this system provides not only an example of an emergent spacetime (with a massive and a massless relativistic fields propagating on it) but also that such spacetime is governed by an equation with geometric meaning that takes the familiar form of Nordstr{\\"o}m theory of gravitation. In this equation the gravitational field is sourced by the expectation value of the trace of the effective stress energy tensor of the quasiparticles while the Newton and cosmological constants are functions of the fundamental scales of the microscopic system. This is the first example of analogue gravity in which a Lorentz invariant, geometric theory of semiclassical gravity emerges from an underlying quantum theory of matter in flat spacetime.
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.
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)
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...
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
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
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
Modeling the Cost of Climate Policy: Distinguishing Between Alternative Cost Deftitions and Long-Run Cost Dynamics Mark Jaccard, John Nyboer, Chris Bataille and Bryn Sadownik* Interest groups and experts debate the cost of greenhouse gas (GHG) reduction, andpolicy-makers do not know whom to believe
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
Chan, Raymond
Distinguishing coding from non-coding sequences in a prokaryote complete genome based on the global in a complete genome is an important problem in DNA sequence analysis. Their rapid and accurate recognition sequences from the non-coding sequences in a prokaryote complete genome. We select a data set of 51
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
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.
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...
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.
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.
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.
Arne Goedeke; Alan D. Rendall
2010-02-21T23:59:59.000Z
It is known that all spatially homogeneous solutions of the vacuum Einstein equations in four dimensions which exist for an infinite proper time towards the future are future geodesically complete. This paper investigates whether the analogous statement holds in higher dimensions. A positive answer to this question is obtained for a large class of models which can be studied with the help of Kaluza-Klein reduction to solutions of the Einstein-scalar field equations in four dimensions. The proof of this result makes use of a criterion for geodesic completeness which is applicable to more general spatially homogeneous models.
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.
BRANDEIS UNIVERSITY FACULTY SENATE
Fraden, Seth
, Robert Moody, Leonard Muellner, Richard Parmentier, Govind Sreenivasan, Malcolm Watson. Senators absent, Leonard Bernstein, and Albert Einstein. One Senator remarked that Albert Einstein would object, there were weekly meetings with Dean of Arts and Sciences Adam Jaffe and Associate Dean Elaine Wong. When
Nore, Caroline
2004-01-01T23:59:59.000Z
C. R. Physique 5 (2004) 38 BoseEinstein condensates: recent advances in collective effects/Avancées récentes sur les effets collectifs dans les condensats de BoseEinstein Boundary layers in Gross ; Superfluidité ; Couches limites et obstacles 1. Introduction Since the first experimental observations of BoseEinstein
Albert Polman Center for Nanophotonics
Polman, Albert
all of the worlds energy assuming 8% efficient photovoltaics Solar irradiance on earth Average solar the price/Watt of photovoltaic energy ???? 1.Increase efficiency 2.Reduce materials costs #12;Solar cell/cost of photovoltaic technology M. Green, UNSW Crystalline Silicon cells #12;Efficiency/cost of photovoltaic technology
General network theory rka albert
Albert, Réka
beconstructedonthesaurisuchasroget's,whichincludesover29,000wordsclassifiedinto 1000 semantic categories. roget's thesaurus Figure 3. Bipartite graph of a thesaurus-based semantic network (top) and its unipartite pro- jection
Representative Albert R. Public Policy
Sibille, Etienne
District. During the last 12 years, he served on the powerful House Energy and Commerce Committee, most of the Subcommittee on Energy and Air Quality. While on Energy and Commerce, Representative Wynn also served OF CONCENTRATION Energy Representative Wynn helped craft the Energy Independence and Security Act of 2007. He added
General Chair Albert Levi, Sabanci
Boyd, Colin
Finance Chair Karen Decker, ICST Local Chair Erkay Savas, Sabanci University, Turkey Webmaster Chairs Can will be judged based on their quality through double-blind reviewing, where the identities of the authors
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
Four wave mixing in the scattering of Bose-Einstein condensates
Band, Yehuda B.
in the electric field strength," Phys. Rev. A137, 801 (1965). 17. A. Yariv and D. M. Pepper, "Amplified reflection. E. Wieman and E. A. Cornell, "Measurements of relative phase in two-component Bose-Einstein condensates," Phys. Rev. Lett. 81, 1543 (1998). 3. H. Wallis, A. Rohrl, M. Naraschewski and A. Schenzle
Bose–Einstein correlations of ?^0 pairs from hadronic Z^0 decays
Wilson, Graham Wallace; OPAL Collaboration; Abbiendi, G.; Ainsley, C.; Å kesson, P.F.; Alexander, G.; Allison, J.; Amaral, P.; Anagnostou, G.; Anderson, K.J.; Arcelli, S.; Asai, S.; Axen, D.
2003-05-01T23:59:59.000Z
We observe Bose–Einstein correlations in ?^0 pairs using back-to-back two jet hadronic events from Z^0 decays in the data sample collected by the OPAL detector at LEP 1 from 1991 to 1995. Using a static Gaussian picture for the pion emitter source...
Radiation to atom quantum mapping by collective recoil in a BoseEinstein condensate
Paris, Matteo G. A.
Radiation to atom quantum mapping by collective recoil in a BoseEinstein condensate Matteo G a scheme to realize radiation to atom continuous variable quantum mapping, i.e., to teleport the quantum a novel scheme to realize radiation to atom quantum state mapping, Optics Communications 227 (2003) 349
August 18, September 16, October 11, 2010 Philosophy in Einstein's Science
, Einstein's writings in physics and philosophy enjoyed a commanding presence in the new movements in modern's adopting an empiricist theory of concepts in order to legitimate an extraordinary new physical proposal examiner in Bern seeking to make a few extra Francs by offering tutorials in physics. Maurice Solovine
Einstein-Podolsky-Rosen correlations of Dirac particles - quantum field theory approach
Pawel Caban; Jakub Rembielinski
2006-12-15T23:59:59.000Z
We calculate correlation function in the Einstein--Podolsky--Rosen type of experiment with massive relativistic Dirac particles in the framework of the quantum field theory formalism. We perform our calculations for states which are physically interesting and transforms covariantly under the full Lorentz group action, i.e. for pseudoscalar and vector state.
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
Towards an improved test of Bose-Einstein statistics for photons
Pines, Alexander
Towards an improved test of Bose-Einstein statistics for photons Damon Brown , Dmitry Budker for photons obtained earlier (D. P. DeMille, D. Budker, N. Derr, and E. Deveney, Phys. Rev. Lett. 83(20), 1378 technique. We also discuss the ultimate limits that one can hope to obtain with this degenerate two-photon
Steering Bose-Einstein Condensates despite Time Symmetry Dario Poletti,1
Li, Baowen
Steering Bose-Einstein Condensates despite Time Symmetry Dario Poletti,1 Giuliano Benenti,2 with a three-mode model. These three-mode model results corroborate well with a many- body study over a time [610] and shows the importance of interaction in the coherent control of quantum tunneling between
Farhad Ali
2014-12-30T23:59:59.000Z
In this paper we present Plane symmetric, Cylindrically Symmetric and Spherically Symmetric Black hole or Vacuum solutions of Einstein Field Equations(EFEs). Some of these solutions are new which we have not seen in the literature. This calculation will help us in understanding the gravitational wave and gravitational wave spacetimes.
Complex Langevin simulation of quantum vortex nucleation in the Bose-Einstein condensate
Tomoya Hayata; Arata Yamamoto
2014-11-19T23:59:59.000Z
The ab-initio simulation of quantum vortex nucleation in the Bose-Einstein condensate is performed by adopting the complex Langevin techniques. We simulate the two-component boson field theory at a finite chemical potential under rotation. In the superfluid phase, vortices are generated above a critical angular velocity and the circulation is clearly quantized even in the presence of quantum fluctuations.
Thermodynamics of a higher dimensional noncommutative anti-de Sitter-Einstein-Born-infeld black hole
Angélica González; Román Linares; Marco Maceda; Oscar Sánchez-Santos
2015-08-21T23:59:59.000Z
We analyze noncommutative deformations of a higher dimensional anti-de Sitter-Einstein-Born-Infeld black hole. Two models based on noncommutative inspired distributions of mass and charge are discussed and their thermodynamical properties are calculated. In the (3+1)-dimensional case, the equation of state and the Gibbs energy function of each model are found.
Uniqueness Theorem for Stationary Axisymmetric Black Holes in Einstein-Maxwell-axion-dilaton Gravity
Marek Rogatko
2010-07-26T23:59:59.000Z
We prove the uniqueness theorem for stationary axisymmetric black hole solution in Einstein-Maxwell-axion-dilaton gravity being the low-energy limit of the heterotic string theory. We consider both non-degenerate and extremal Kerr-Sen black hole solutions.
Uniqueness theorem for stationary axisymmetric black holes in Einstein-Maxwell-axion-dilaton gravity
Rogatko, Marek [Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, pl. Marii Curie-Sklodowskiej 1 (Poland)
2010-08-15T23:59:59.000Z
We prove the uniqueness theorem for the stationary axisymmetric black hole solution in Einstein-Maxwell-axion-dilaton gravity being the low-energy limit of the heterotic string theory. We consider both the nonextremal and extremal Kerr-Sen black hole solutions.
Wave packet dynamics of the matter wave field of a Bose-Einstein condensate
C. Sudheesh; S. Lakshmibala; V. Balakrishnan
2004-08-11T23:59:59.000Z
We show in the framework of a tractable model that revivals and fractional revivals of wave packets afford clear signatures of the extent of departure from coherence and from Poisson statistics of the matter wave field in a Bose-Einstein condensate, or of a suitably chosen initial state of the radiation field propagating in a Kerr-like medium.
Fidelity for the quantum evolution of a Bose-Einstein condensate Jie Liu,1,2
Li, Baowen
in the control, manipulation, and even future application of this newly formed matter. Dy- namical instability 3-Einstein condensate BEC and reveal its general property with a simple two-component BEC model. We find that, when The investigation of coherent manipulation of the quan- tum state of matter and light has provided insights
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 Progress in the field of atom optics depends on developing improved sources of matter waves and advances source was to make sure that the new cooling cycle did not destroy the condensate held in the reservoir
Quasi-projectivity of the moduli space of smooth Kahler-Einstein ...
2015-03-02T23:59:59.000Z
Mar 2, 2015 ... The study of moduli spaces of polarized varieties is a fundamental topic in .... supported by the grant 'The National Science Fund for Distinguished Young Scholars'. ...... Moduli of varieties of general type, Handbook of moduli.
Distinguishability Recall A deterministic finite automaton is a five-tuple M = (S, , T, s0, F)
Dunham, Doug
define the multi-step transition function T : S × S as follows. 1. For any s S, T (s, ) = s . 2. For any s S, x and a , T (s, xa) = T(T (s, x), a) . A string x is accepted by M if T (s0, x) F. Definition For any language L over , and any x, y, z , we say x and y are distinguished by z wrt L
Florian Beyer; Leon Escobar; Jörg Frauendiener
2015-05-21T23:59:59.000Z
We apply a single patch pseudo-spectral scheme based on integer spin-weighted spherical harmonics presented in [1, 2] to Einstein's equations. The particular hyperbolic reduction of Einstein's equations which we use is obtained by a covariant version of the generalized harmonic formalism and Geroch's symmetry reduction. In this paper we focus on spacetimes with a spatial S3-topology and symmetry group U(1). We discuss analytical and numerical issues related to our implementation. As a test, we reproduce numerically exact inhomogeneous cosmological solutions of the vacuum Einstein field equations obtained in [3].
Beyer, Florian; Frauendiener, Jörg
2015-01-01T23:59:59.000Z
We apply a single patch pseudo-spectral scheme based on integer spin-weighted spherical harmonics presented in [1, 2] to Einstein's equations. The particular hyperbolic reduction of Einstein's equations which we use is obtained by a covariant version of the generalized harmonic formalism and Geroch's symmetry reduction. In this paper we focus on spacetimes with a spatial S3-topology and symmetry group U(1). We discuss analytical and numerical issues related to our implementation. As a test, we reproduce numerically exact inhomogeneous cosmological solutions of the vacuum Einstein field equations obtained in [3].
A review of "The Iconography of Sir Isaac Newton to 1800." by Milo Keynes
Nicholas H. Clulee
2005-01-01T23:59:59.000Z
, 2005. viii + 120 pp. + 24 ills. $80.00. Reviewed by NICHOLAS H. CLULEE, FROSTBURG STATE UNIVERSITY. In this centennial of Albert Einstein?s miraculous year of 1905, Einstein?s image is immediately recognizable on the posters, announcements, and web...
Imprint of modified Einstein's gravity on white dwarfs: Unifying type Ia supernovae
Das, Upasana
2015-01-01T23:59:59.000Z
We establish the importance of modified Einstein's gravity (MG) in white dwarfs (WDs) for the first time in the literature. We show that MG leads to significantly sub- and super-Chandrasekhar limiting mass WDs, depending on a single model parameter. However, conventional WDs on approaching Chandrasekhar's limit are expected to trigger type Ia supernovae (SNeIa), a key to unravel the evolutionary history of the universe. Nevertheless, observations of several peculiar, under- and over-luminous SNeIa argue for the limiting mass widely different from Chandrasekhar's limit. Explosions of MG induced sub- and super-Chandrasekhar limiting mass WDs explain under- and over-luminous SNeIa respectively, thus unifying these two apparently disjoint sub-classes. Our discovery questions both the global validity of Einstein's gravity and the uniqueness of Chandrasekhar's limit.
Dynamics of Anisotropic Collapsing Spheres in Einstein Gauss-Bonnet Gravity
G. Abbas; M. Zubair
2015-03-06T23:59:59.000Z
This paper is devoted to investigate the dynamics of the self gravitating adiabatic and anisotropic source in $5D$ Einstein Gauss-Bonnet gravity. To this end, the source has been taken as Tolman-Bondi model which preserve inhomogeneity in nature. The field equations, Misner-Sharp mass and dynamical equations have formulated in Einstein Gauss-Bonnet gravity in $5D$. The junction conditions have been explored between the anisotropic source and vacuum solution in Gauss-Bonnet gravity in detail. The Misner and Sharp approach has been applied to define the proper time and radial derivatives. Further, these helps to formulate general dynamical equations. The equations show that the mass of the collapsing system increases with the same amount as the effective radial pressure increases. The dynamical system preserve retardation which implies that system under-consideration goes to gravitational collapse.
Einstein-Born-Infeld black holes with a scalar hair in three-dimensions
S. Habib Mazharimousavi; M. Halilsoy
2014-08-15T23:59:59.000Z
We present a black hole solution in $2+1-$dimensional Einstein's theory of gravity coupled with Born-Infeld nonlinear electrodynamic and a massless self-interacting scalar field. The model has five free parameters: mass ($M$% ), cosmological constant ($\\ell $), electric ($q$) and scalar ($r_{0}$) charges and Born-Infeld parameter ($\\beta $). To attain exact solution for such a highly non-linear system we adjust, i.e. finely tune, the parameters of the theory with the integration constants. In the limit $\\beta \\rightarrow 0$ we recover the results of Einstein-Maxwell-Scalar theory, obtained before. The self interacting potential admits finite minima apt for the vacuum contribution. Hawking temperature of the model is investigated versus properly tuned parameters.
Korzy?ski, Miko?aj; Bentivegna, Eloisa
2015-01-01T23:59:59.000Z
We discuss the possibility of a dimensional reduction of the Einstein equations in S3 black-hole lattices. It was reported in previous literature that the evolution of spaces containing curves of local, discrete rotational and reflection Symmetry (LDRRS) can be carried out via a system of ODEs along these curves. However, 3+1 Numerical Relativity computations demonstrate that this is not the case, and we show analytically that this is due to the presence of a tensorial quantity which is not suppressed by the symmetry. We calculate the term analytically, and verify numerically for an 8-black-hole lattice that it fully accounts for the anomalous results, and thus quantify its magnitude in this specific case. The presence of this term prevents the exact evolution of these spaces via previously-reported methods which do not involve a full 3+1 integration of Einstein's equation.
Bose-Einstein Interference in the Passage of a Jet in a Dense Medium
Cheuk-Yin Wong
2012-04-16T23:59:59.000Z
When a jet collides coherently with many parton scatterers at very high energies, the Bose-Einstein symmetry with respect to the interchange of the virtual bosons leads to a destructive interference of the Feynman amplitudes in most regions of the momentum transfer phase space but a constructive interference in some other regions of the momentum transfer phase space. As a consequence, the recoiling scatterers have a tendency to come out collectively along the incident jet direction, each carrying a substantial fraction of the incident jet longitudinal momentum. The manifestation of the Bose-Einstein interference as collective recoils of the scatterers along the jet direction may have been observed in angular correlations of hadrons associated with a high-pT trigger in high-energy heavy-nuclei collisions at RHIC and LHC.
Einstein-Born-Infeld on Taub-NUT Spacetime in 2k+2 Dimensions
A. Khodam-Mohammadi
2009-05-26T23:59:59.000Z
We wish to construct solutions of Taub-NUT spacetime in Einstein-Born-Infeld gravity in even dimensions. Since Born-Infeld theory is a nonlinear electrodynamics theory, in leads to nonlinear differential equations. However a proper analytical solution was not obtain, we try to solve it numerically (by the Runge-Kotta method) with initial conditions coinciding with those of our previous work in Einstein-Maxwell gravity. We solve equations for 4, 6 and 8 dimensions and do data fitting by the least-squares method. For N=l=b=1, the metric turns to the NUT solution only in 8 dimensions, but in 4 and 6 dimensions the spacetime does not have any Nut solution.
Rotating Bose-Einstein condensates: Closing the gap between exact and mean-field solutions
J. C. Cremon; A. D. Jackson; E. \\" O. Karabulut; G. M. Kavoulakis; B. R. Mottelson; S. M. Reimann
2015-01-22T23:59:59.000Z
When a Bose-Einstein condensed cloud of atoms is given some angular momentum, it forms vortices arranged in structures with a discrete rotational symmetry. For these vortex states, the Hilbert space of the exact solution separates into a "primary" space related to the mean-field Gross-Pitaevskii solution and a "complementary" space including the corrections beyond mean-field. Considering a weakly-interacting Bose-Einstein condensate of harmonically-trapped atoms, we demonstrate how this separation can be used to close the conceptual gap between exact solutions for systems with only a few atoms and the thermodynamic limit for which the mean-field is the correct leading-order approximation. Although we illustrate this approach for the case of weak interactions, it is expected to be more generally valid.
The Einstein-Hilbert action with cosmological constant as a functional of generic form
Tolksdorf Juergen
2014-07-14T23:59:59.000Z
The geometrical underpinnings of a specific class of Dirac operators is discussed. It is demonstrated how this class of Dirac operators allow to relate various geometrical functionals like, for example, the Yang-Mills action and the functional of non-linear $\\sigma-$models (i.e. of (Dirac) harmonic maps). These functionals are shown to be similar to the Einstein-Hilbert action with cosmological constant (EHC). The EHC may thus be regarded as a "generic functional". As a byproduct, the geometrical setup presented also allows to avoid the issue of "fermion doubling" as usually encountered, for instance, in the geometrical discussion of the Standard Model in terms of Dirac operators. Furthermore, it is demonstrated how the geometrical setup presented allows to derive the cosmological constant term of the EHC from the Einstein-Hilbert functional and the action of a purely gauge coupling Higgs field.
Static Axisymmetric Einstein Equations in Vacuum: Symmetry, New Solutions and Ricci Solitons
Akbar, M M
2015-01-01T23:59:59.000Z
An explicit one-parameter Lie point symmetry of the four-dimensional vacuum Einstein equations with two commuting hypersurface-orthogonal Killing vector fields is presented. The parameter takes values over all of the real line and the action of the group can be effected algebraically on any solution of the system. This enables one to construct particular one-parameter extended families of axisymmetric static solutions and cylindrical gravitational wave solutions from old ones, in a simpler way than most solution-generation techniques, including the prescription given by Ernst for this system. As examples, we obtain the families that generalize the Schwarzschild solution and the $C$-metric. These in effect superpose a Levi-Civita cylindrical solution on the seeds. Exploiting a correspondence between static solutions of Einstein's equations and Ricci solitons (self-similar solutions of the Ricci flow), this also enables us to construct new steady Ricci solitons.
Non-exponential one-body loss in a Bose-Einstein condensate
S. Knoop; J. S. Borbely; R. van Rooij; W. Vassen
2012-01-31T23:59:59.000Z
We have studied the decay of a Bose-Einstein condensate of metastable helium atoms in an optical dipole trap. In the regime where two- and three-body losses can be neglected we show that the Bose-Einstein condensate and the thermal cloud show fundamentally different decay characteristics. The total number of atoms decays exponentially with time constant tau; however, the thermal cloud decays exponentially with time constant (4/3)tau and the condensate decays much faster, and non-exponentially. We show that this behaviour, which should be present for all BECs in thermal equilibrium with a considerable thermal fraction, is due to a transfer of atoms from the condensate to the thermal cloud during its decay.
Salvatore Antoci
2008-03-25T23:59:59.000Z
A particular exact solution of Einstein's Hermitian theory of relativity is examined, after recalling that there is merit in adding phenomenological sources to the theory, and in choosing the metric like it was done long ago by Kursunoglu and Hely. It is shown by intrinsic arguments, relying on the properties of the chosen metric manifold, that the solution describes in Einstein's theory the field of n thin parallel wires at rest, run by steady electric currents, and predicts their equilibrium positions through the injunction that the metric must display cylindrical symmetry in the infinitesimal neighbourhood of each wire. In the weak field limit the equilibrium positions coincide with the ones prescribed by Maxwell's electrodynamics.
Non-Singular Spherically Symmetric Solution in Einstein-Scalar-Tensor Gravity
J. W. Moffat
2008-06-11T23:59:59.000Z
A static spherically symmetric metric in Einstein-scalar-tensor gravity theory with a scalar field potential $V[\\phi]$ is non-singular for all real values of the coordinates. It does not have a black hole event horizon and there is no essential singularity at the origin of coordinates. The weak energy condition $\\rho_\\phi > 0$ fails to be satisfied for $r\\lesssim 1.3r_S$ (where $r_S$ is the Schwarzschild radius) but the strong energy condition $\\rho_\\phi+3p_\\phi > 0$ is satisfied. The classical Einstein-scalar-tensor solution is regular everywhere in spacetime without a black hole event horizon. However, the violation of the weak energy condition may signal the need for quantum physics anti-gravity as $r\\to 0$. The non-singular static spherically symmetric solution is stable against the addition of ordinary matter.
An efficient numerical method for computing dynamics of spin F = 2 Bose-Einstein condensates
Wang Hanquan, E-mail: hanquan.wang@gmail.com [School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan Province 650221 (China); Department of Mathematics, National University of Singapore, Singapore 117543 (Singapore)
2011-07-01T23:59:59.000Z
In this paper, we extend the efficient time-splitting Fourier pseudospectral method to solve the generalized Gross-Pitaevskii (GP) equations, which model the dynamics of spin F = 2 Bose-Einstein condensates at extremely low temperature. Using the time-splitting technique, we split the generalized GP equations into one linear part and two nonlinear parts: the linear part is solved with the Fourier pseudospectral method; one of nonlinear parts is solved analytically while the other one is reformulated into a matrix formulation and solved by diagonalization. We show that the method keeps well the conservation laws related to generalized GP equations in 1D and 2D. We also show that the method is of second-order in time and spectrally accurate in space through a one-dimensional numerical test. We apply the method to investigate the dynamics of spin F = 2 Bose-Einstein condensates confined in a uniform/nonuniform magnetic field.
Temperature jump in degenerate quantum gases in the presence of a Bose - Einstein condensate
A. V. Latyshev; A. A. Yushkanov
2010-01-04T23:59:59.000Z
We construct a kinetic equation modeling the behavior of degenerate quantum Bose gases whose collision rate depends on the momentum of elementary excitations. We consider the case where the phonon component is the decisive factor in the elementary excitations. We analytically solve the half-space boundary value problem of the temperature jump at the boundary of the degenerate Bose gas in the presence of a Bose -- Einstein condensate.
Quantum information approach to Bose-Einstein condensate of composite bosons
Su-Yong Lee; Jayne Thompson; Sadegh Raeisi; Pawel Kurzynski; Dagomir Kaszlikowski
2014-09-23T23:59:59.000Z
We consider composite bosons (cobosons) comprised of two elementary particles, fermions or bosons, in an entangled state. We study a model of Bose-Einstein condensation (BEC) for indistinguishable cobosons. We find that cobosons made of two entangled fermions behave in a predictable way, i.e., their condensate fraction and the transition temperature are increasing functions of their entanglement. Interestingly, cobosons made of two entangled bosons exhibit the opposite behaviour - their condensate fraction and the transition temperature are decreasing functions of entanglement.
Bose-Einstein correlation to measure the size of event of different types
V. A. Schegelsky; M. G. Ryskin
2015-06-11T23:59:59.000Z
Bose-Einstein correlations of identical hadrons produced in high- energy pp collisions at the LHC is a good instrument to probe the size of the domain which emits these hadrons in different classes of events. This provides an additional information on the dynamics of multiparticle production. In particular this way we may measure the radius of the colour tube/string which create the secondary pions.
Bose-Einstein correlation to measure the size of event of different types
Schegelsky, V A
2015-01-01T23:59:59.000Z
Bose-Einstein correlations of identical hadrons produced in high- energy pp collisions at the LHC is a good instrument to probe the size of the domain which emits these hadrons in different classes of events. This provides an additional information on the dynamics of multiparticle production. In particular this way we may measure the radius of the colour tube/string which create the secondary pions.
Instability of Bose-Einstein condensation on quantum graphs under repulsive perturbations
Jens Bolte; Joachim Kerner
2014-11-26T23:59:59.000Z
In this Note we investigate Bose-Einstein condensation in interacting quantum many-particle systems on graphs. We extend previous results obtained for particles on an interval and show that even arbitrarily small repulsive two-particle interactions destroy a condensate in the non-interacting Bose gas. Our results also cover singular two-particle interactions, such as the well-known Lieb-Lininger model, in the thermodynamic limit.
Vladimir T. Granik; Alex Granik
2013-03-27T23:59:59.000Z
It is traditionally believed that the Lorentz transformations (LT) and Einstein's theorem of velocity addition (ETVA), underlying special relativity, cannot be obtained from non-relativistic (classical) mechanics. In the present paper it is shown, however, that both the LT and the ETVA are derivable within the framework of classical kinematics if the speeds of material points are bounded above by a certain universal limit $c_+$ which can coincide with the speed of light $c$ in a vacuum.
Controlling chaos in the Bose-Einstein condensate system of a double lattice
Wang Zhixia, E-mail: wzx2007111@126.com; Ni Zhengguo; Cong Fuzhong [Aviation University of Air Force (China); Liu Xueshen [Jilin University, Institute of Atomic and Molecular Physics (China); Chen Lei [Aviation University of Air Force (China)
2011-02-15T23:59:59.000Z
We study the chaotic dynamics in the Bose-Einstein condensate (BEC) system of a double lattice. Chaotic space-time evolution is investigated for the particle number density in a BEC. By changing of the s-wave scattering length with a Feshbach resonance, the chaotic behavior can be well controlled to enter into periodicity. Numerical calculation shows that there is periodic orbit according to the s-wave scattering length only if the maximal Lyapunov exponent of the system is negative.
Controlling chaos in a Bose-Einstein condensate loaded into a moving optical lattice potential
Wang Zhixia [Aviation University of the Air Force (China)], E-mail: wzx2007111@126.com; Zhang Xihe; Shen Ke [Changchun University of Science and Technology, Department of Physics (China)
2008-11-15T23:59:59.000Z
The spatial structure of a Bose-Einstein condensate loaded into an optical lattice potential is investigated, and spatially chaotic distributions of the condensates are revealed. By means of changing of 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 maximal Lyapunov exponent of the system is negative.
Chaotic Oscillations in Finite Quantum Systems: Trapped Bose-Einstein Condensates
Luca Salasnich
1999-06-22T23:59:59.000Z
We discuss the recently achieved Bose-Einstein condensation for alkali-metal atoms in magnetic traps. The theoretically predicted low-energy collective oscillations of the condensate have been experimentally confirmed by laser imaging techniques. We show by using Poincar\\`e sections that at higher energies non-linear effects appear and oscillations become chaotic. PACS 03.75.Fi, 05.30.Jp, 05.45.+b, 32.80.Pj
Energy of Einstein's static universe and its implications for the ?CDM cosmology
Mitra, Abhas, E-mail: amitra@barc.gov.in [Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai-400085 (India)
2013-03-01T23:59:59.000Z
The total Einstein energy (P{sub 0}) of a homogeneous and isotropic universe can be computed by using an appropriate superpotential (Rosen 1994) and also by a direct method (Mitra 2010). Irrespective of the physical significance of P{sub 0}, its eventual numerical value must be same in both the cases because both are derived from the same Einstein pseudo tensor and by employing the same coordinates. It follows then that the static isotropic and homogeneous universe, i.e., Einstein's static universe (ESU), must have an infinite radius and which tantamounts to a spatially flat case. The physical significance of this result is that the cosmological constant, ?, is actually zero and ESU is the vacuous Minkowski spacetime. It is the same result which has recently been obtained in a completely independent manner (Mitra, Bhattacharyya and Bhatt 2013). Thus even though, mathematically, one can conceive of a static 3-sphere for the foundation of relativistic cosmology, physically, no such 3-sphere exists. On the other hand, the spatial section of the universe could essentially be an Euclidean space with local curvature spikes due to presence of lumpy matter. Since the ''Dark Energy'' is associated with ? in the ?CDM model, the result obtained here suggests that it is an artifact of departure of the lumpy and fractal universe from the ideal Friedmann Robertson Walker model (Jackson et al. 2012, Cowley et al. 2013)
Deformed Horava-Lifshitz Cosmology and Stability of Einstein Static Universe
Y. Heydarzade; M. Khodadi; F. Darabi
2015-02-16T23:59:59.000Z
Stability of the Einstein static universe versus the linear scalar, vector and tensor perturbations is investigated in the context of deformed Ho\\v{r}ava-Lifshitz cosmology inspired by entropic force scenario. A general stability condition against the linear scalar perturbations is obtained. Using this general condition, it is shown that there is no stable Einstein static universe for the case of flat universe, $k=0$. For the the special case of large values of running parameter of HL gravity $\\omega$, in a positively curved universe $k>0$, the domination of the quintessence and phantom matter fields with barotropic equation of state parameter $\\betauniverse $k -\\frac{1}{3}$ are needed to be the dominant fields of the universe. Also, a neutral stability against the vector perturbations is obtained. Finally, an inequality including the cosmological parameters of the Einstein static universe is obtained for the stability against the tensor perturbations. It turns out that for large $\\omega$ values, there is a stability against the tensor perturbations.
Einstein-Born-Infeld black holes with a scalar hair in three-dimensions
S. Habib Mazharimousavi; M. Halilsoy
2015-07-28T23:59:59.000Z
We present black hole solutions in $2+1-$dimensional Einstein's theory of gravity coupled with Born-Infeld nonlinear electrodynamic and a massless self-interacting scalar field. The model has five free parameters: mass $M$, cosmological constant $\\ell $, electric $q$ and scalar $r_{0}$ charges and Born-Infeld parameter $\\beta $. To attain exact solution for such a highly non-linear system we adjust, i.e. finely tune, the parameters of the theory with the integration constants. In the limit $\\beta \\rightarrow 0$ we recover the results of Einstein-Maxwell-Scalar theory, obtained before. The self interacting potential admits finite minima apt for the vacuum contribution. Hawking temperature of the model is investigated versus properly tuned parameters. By employing this tuned-solution as basis, we obtain also a dynamic solution which in the proper limit admits the known solution in Einstein gravity coupled with self-interacting scalar field. Finally we establish the equations of a general scalar-tensor field coupled to nonlinear electrodynamics field\\ in $2+1-$dimensions without searching for exact solutions.
On Einstein - Weyl unified model of dark energy and dark matter
A. T. Filippov
2009-05-29T23:59:59.000Z
Here I give a more detailed account of the part of the conference report that was devoted to reinterpreting the Einstein `unified models of gravity and electromagnetism' (1923) as the unified theory of dark energy (cosmological constant) and dark matter (neutral massive vector particle having only gravitational interactions). After summarizing Einstein's work and related earlier work of Weyl and Eddington, I present an approach to finding spherically symmetric solutions of the simplest variant of the Einstein models that was earlier mentioned in Weyl's work as an example of his generalization of general relativity. The spherically symmetric static solutions and homogeneous cosmological models are considered in some detail. As the theory is not integrable we study approximate solutions. In the static case, we show that there may exist two horizons and derive solutions near horizons. In cosmology, we propose to study the corresponding expansions of possible solutions near the origin and derive these expansions in a simplified model neglecting anisotropy. The structure of the solutions seems to hint at a possibility of an inflation mechanism that does not require adding scalar fields.
Dynamics of the spatially homogeneous Bianchi type I Einstein-Vlasov equations
J. Mark Heinzle; Claes Uggla
2005-12-05T23:59:59.000Z
We investigate the dynamics of spatially homogeneous solutions of the Einstein-Vlasov equations with Bianchi type I symmetry by using dynamical systems methods. All models are forever expanding and isotropize toward the future; toward the past there exists a singularity. We identify and describe all possible past asymptotic states; in particular, on the past attractor set we establish the existence of a heteroclinic network, which is a new type of feature in general relativity. This illustrates among other things that Vlasov matter can lead to quite different dynamics of cosmological models as compared to perfect fluids.
Wei-Dong Li; Yunbo Zhang; J. -Q. Liang
2003-05-21T23:59:59.000Z
The energy band structure and energy splitting due to quantum tunneling in two weakly linked Bose-Einstein condensates were calculated by using the instanton method. The intrinsic coherent properties of Bose Josephson junction were investigated in terms of energy splitting. For $E_{C}/E_{J}\\ll 1$, the energy splitting is small and the system is globally phase coherent. In the opposite limit, $E_{C}/E_{J}\\gg 1$, the energy splitting is large and the system becomes a phase dissipation. Our reslults suggest that one should investigate the coherence phenomna of BJJ in proper condition such as $E_{C}/E_{J}\\sim 1$.
Multipulse phases in k-mixtures of Bose-Einstein condensates
Susanna Terracini; Gianmaria Verzini
2008-07-12T23:59:59.000Z
For a competitive system of k coupled nonlinear Schroedinger equations we prove the existence, when the competition parameter is large, of positive radial solutions on R^N. We show that, when the competition parameter goes to infinity, the profile of each component separates, in many pulses, from the others. Moreover, we can prescribe the location of such pulses in terms of the oscillations of the changing-sign solutions of the scalar nonlinear Schroedinger equation. Within an Hartree-Fock approximation, this provides a theoretical indication of phase separation into many nodal domains for the k-mixtures of Bose-Einstein condensates.
R. J. van den Hoogen
2009-09-01T23:59:59.000Z
A formalism for analyzing the complete set of field equations describing Macroscopic Gravity is presented. Using this formalism, a cosmological solution to the Macroscopic Gravity equations is determined. It is found that if a particular segment of the connection correlation tensor is zero and if the macroscopic geometry is described by a flat Robertson-Walker metric, then the effective correction to the averaged Einstein Field equations of General Relativity i.e., the backreaction, is equivalent to a positive spatial curvature term. This investigation completes the analysis of [Phys. Rev. Lett., vol. 95, 151102, (2005)] and the formalism developed provides a possible basis for future studies.
Fast frictionless dynamics as a toolbox for low-dimensional Bose-Einstein condensates
A. del Campo
2011-11-17T23:59:59.000Z
A method is proposed to implement a fast frictionless dynamics in a low-dimensional Bose-Einstein condensate by engineering the time-dependence of the transverse confining potential in a highly anisotropic trap. The method exploits the inversion of the dynamical self-similar scaling law in the radial degrees of freedom. We discuss the application of the method to preserve short-range correlations in time of flight experiments, the implementation of nearly-sudden quenches of non-linear interactions, and its power to assist self-similar dynamics in quasi-one dimensional condensates.
Bose-Einstein Correlations in W+W- events at LEP2
The DELPHI Collaboration; J. Abdallah
2005-07-14T23:59:59.000Z
Bose-Einstein correlations (BEC) between final state particles in the reaction e+e- -> W+W- -> q_1 anti-q_2 q_3 anti-q_4 have been studied. Data corresponding to a total integrated luminosity of 550 pb^{-1}, recorded by the DELPHI detector at centre-of-mass energies ranging from 189 to 209 GeV, were analysed. An indication for inter-W BEC between like-sign particles has been found at the level of 2.4 standard deviations of the combined statistical and systematic uncertainties.
Bevilaqua, L Ibiapina; da Silva, A J
2015-01-01T23:59:59.000Z
In this work we use the framework of effective field theory to couple Einstein's gravity to scalar electrodynamics and determine the renormalization of the model. We consider the effective field theory up to dimension six operators, corresponding to processes involving one graviton exchange. We see that the beta function of the electric charge is positive and possesses no contribution coming from gravitational interaction. Our result indicates that gravitational corrections do not alter the running behavior of the gauge coupling constants, even if massive particles are present.
Boundary Effects on Bose-Einstein Condensation in Ultra-Static Space-Times
L. Akant; E. Ertugrul; Y. Gul; O. T. Turgut
2015-05-13T23:59:59.000Z
The boundary effects on the Bose-Einstein condensation of a Bose gas with a nonvanishing chemical potential on an ultra-static space-time are studied. High temperature regime, which is the relevant regime for the relativistic gas, is studied through the heat kernel expansion for both Dirichlet and Neumann boundary conditions. The high temperature expansion in the presence of a chemical potential is generated via the Mellin transform methods as applied to the harmonic sums representing the free energy and the depletion coefficient. The effects of boundary conditions on the relation between depletion coefficient and temperature are analyzed. The analysis is done for both charged and neutral bosons.
Jain, Piyush; Cinti, Fabio; Boninsegni, Massimo [Department of Physics, University of Alberta, Edmonton, Alberta (Canada)
2011-07-01T23:59:59.000Z
Low-temperature properties of harmonically confined two-dimensional assemblies of dipolar bosons are systematically investigated by Monte Carlo simulations. Calculations carried out for different numbers of particles and strengths of the confining potential yield evidence of a quantum phase transition from a superfluid to a crystal-like phase, consistently with what is observed in the homogeneous system. It is found that the crystal phase nucleates in the center of the trap, as the density increases. Bose-Einstein condensation vanishes at T=0 upon entering the crystalline phase, concurrently with the disappearance of the superfluid response.
Axion Bose-Einstein Condensation: a model beyond Cold Dark Matter
Yang, Q
2010-01-01T23:59:59.000Z
Cold dark matter axions form a Bose-Einstein condensate if the axions thermalize. Recently, it was found that they do thermalize when the photon temperature reaches T ~ 100 eV(f/10^12GeV)^1/2 and that they continue to do so thereafter. We discuss the differences between axion BEC and CDM in the linear regime and the non-linear regime of evolution of density perturbations. We find that axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multi-poles.
Axion Bose-Einstein Condensation: a model beyond Cold Dark Matter
Q. Yang
2010-04-15T23:59:59.000Z
Cold dark matter axions form a Bose-Einstein condensate if the axions thermalize. Recently, it was found that they do thermalize when the photon temperature reaches T ~ 100 eV(f/10^12GeV)^1/2 and that they continue to do so thereafter. We discuss the differences between axion BEC and CDM in the linear regime and the non-linear regime of evolution of density perturbations. We find that axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multi-poles.
Phase ordering percolation and domain-wall survival in segregating binary Bose-Einstein condensates
Takeuchi, Hiromitsu; Dehara, Kentaro
2015-01-01T23:59:59.000Z
Percolation theory is applied to the phase transition dynamics of domain pattern formation in segregating quasi-two-dimensional binary Bose--Einstein condensates. Our numerical experiments revealed that the percolation threshold is close to 0.5. A long-range open domain wall appears with a fractal dimension between two percolating domains. Such a wall can survive for a long time as a relic of the phase transition according to the dynamic finite-size-scaling hypothesis, which seems to be in contrast to the current understanding in cosmology that an infinite defect violates a scale invariance.
Decoherence in a quantum harmonic oscillator monitored by a Bose-Einstein condensate
Brouard, S; Sokolovski, D
2010-01-01T23:59:59.000Z
We investigate the dynamics of a quantum oscillator, whose evolution is monitored by a Bose-Einstein condensate (BEC) trapped in a symmetric double well potential. It is demonstrated that the oscillator may experience various degrees of decoherence depending on the variable being measured and the state in which the BEC is prepared. These range from a `coherent' regime in which only the variances of the oscillator position and momentum are affected by measurement, to a slow (power law) or rapid (Gaussian) decoherence of the mean values themselves.
Oscillating Solitons in a Three-Component Bose-Einstein Condensate
Szankowski, Piotr; Trippenbach, Marek [Institute for Theoretical Physics, Warsaw University, ul. Hoza 69, PL-00-681, Warsaw (Poland); Infeld, Eryk [Soltan Institute for Nuclear Studies, ul. Hoza 69, PL-00-681 Warsaw (Poland); Rowlands, George [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
2010-09-17T23:59:59.000Z
We investigate the properties of three-component Bose-Einstein condensate systems with spin exchange interactions. We consider different coupling constants from those very special ones leading to exact solutions known in the literature. When two solitons collide, a spin component oscillation of the two emerging entities is observed. This behavior seems to be generic. A mathematical model is derived for the emerging solitons. It describes the new oscillatory phenomenon extremely well. Surprisingly, the model is in fact an exact solution to the initial equations. This comes as a bonus.
Anderson Localization of Expanding Bose-Einstein Condensates in Random Potentials
Sanchez-Palencia, L.; Clement, D.; Lugan, P.; Bouyer, P.; Aspect, A. [Laboratoire Charles Fabry de l'Institut d'Optique, CNRS and Univ. Paris-Sud, Campus Polytechnique, RD 128, F-91127 Palaiseau cedex (France); Shlyapnikov, G. V. [Laboratoire de Physique Theorique et Modeles Statistiques, Univ. Paris-Sud, F-91405 Orsay cedex (France); Van der Waals-Zeeman Institute, Univ. Amsterdam, Valckenierstraat 65/67, 1018 XE Amsterdam (Netherlands)
2007-05-25T23:59:59.000Z
We show that the expansion of an initially confined interacting 1D Bose-Einstein condensate can exhibit Anderson localization in a weak random potential with correlation length {sigma}{sub R}. For speckle potentials the Fourier transform of the correlation function vanishes for momenta k>2/{sigma}{sub R} so that the Lyapunov exponent vanishes in the Born approximation for k>1/{sigma}{sub R}. Then, for the initial healing length of the condensate {xi}{sub in}>{sigma}{sub R} the localization is exponential, and for {xi}{sub in}<{sigma}{sub R} it changes to algebraic.
Bose-Einstein condensates in the presence of a magnetic trap and optical lattice
Kapitula, Todd; Kevrekidis, P.G. [Department of Mathematics and Statistics, University of New Mexico, Albuquerque, New Mexico 87131 (United States); Department of Mathematics and Statistics, University of Massachusetts, Amherst, Massachusetts 01003-4515 (United States)
2005-09-01T23:59:59.000Z
In this paper we consider solutions of a nonlinear Schroedinger equation with a parabolic and a periodic potential motivated from the dynamics of Bose-Einstein condensates. Our starting point is the corresponding linear problem which we analyze through regular perturbation and homogenization techniques. We then use Lyapunov-Schmidt theory to establish the persistence and bifurcation of the linear states in the presence of attractive and repulsive nonlinear inter-particle interactions. Stability of such solutions is also examined and a count is given of the potential real, complex and imaginary eigenvalues with negative Krein signature that such solutions may possess. The results are corroborated with numerical computations.
Toric data and Killing forms on homogeneous Sasaki-Einstein manifold $T^{1,1}$
Vladimir Slesar; Mihai Visinescu; Gabriel Eduard Vilcu
2015-03-02T23:59:59.000Z
Throughout this paper we investigate the complex structure of the conifold $C(T^{1,1})$ basically making use of the interplay between symplectic and complex approaches of the K\\"{a}hler toric manifolds. The description of the Calabi-Yau manifold $C(T^{1,1})$ using toric data allows us to write explicitly the complex coordinates and apply standard methods for extracting special Killing forms on the base manifold. As an outcome, we obtain the complete set of special Killing forms on the five-dimensional Sasaki-Einstein space $T^{1,1}$.
Axion Bose-Einstein Condensation: a model beyond Cold Dark Matter
Yang, Q. [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
2010-08-30T23:59:59.000Z
Cold dark matter axions form a Bose-Einstein condensate if the axions thermalize. Recently, it was found [1] that they do thermalize when the photon temperature reaches T{approx}100 eV(f/10{sup 12} GeV){sup 1/2} and that they continue to do so thereafter. We discuss the differences between axion BEC and CDM in the linear regime and the non-linear regime of evolution of density perturbations. We find that axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multi-poles.
Quantum corrections to the entropy of Einstein-Maxwell dilaton-axion black holes
M. Akbar; K. Saifullah
2010-02-20T23:59:59.000Z
We study the corrections to the entropy of Einstein-Maxwell dilaton-axion black holes beyond semiclassical approximations. We consider the entropy of the black hole as a state variable and derive these corrections using the exactness criteria of the first law of thermodynamics. We note that from this general frame-work the entropy corrections for "simpler" black holes like Schwarzschild, Reissner-Nordstr\\"{o}m and anti-de Sitter-Schwarzschild black holes follow easily. This procedure gives us the modified area law as well.
High-field instability of a field-induced triplon Bose-Einstein condensate
Rakhimov, Abdulla [Institute of Nuclear Physics, Tashkent 100214 (Uzbekistan); Sherman, E. Ya. [Department of Physical Chemistry, University of Basque Country, 48080 Bilbao (Spain); IKERBASQUE Basque Foundation for Science, Alameda Urquijo 36-5, 48011 Bilbao, Bizkaia (Spain); Kim, Chul Koo [Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749 (Korea, Republic of)
2010-01-01T23:59:59.000Z
We study properties of magnetic field-induced Bose-Einstein condensate of triplons as a function of temperature and the field within the Hartree-Fock-Bogoliubov approach including the anomalous density. We show that the magnetization is continuous across the transition, in agreement with the experiment. In sufficiently strong fields the condensate becomes unstable due to triplon-triplon repulsion. As a result, the system is characterized by two critical magnetic fields: one producing the condensate and the other destroying it. We show that nonparabolic triplon dispersion arising due to the gapped bare spectrum and the crystal structure has a strong influence on the phase diagram.
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Zerkle wins Governor's Distinguished
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Gelfond, Michael
University and a group of petrochemical companies jointly established an off-campus graduate degree program. There, he managed research and development projects on the reduction of air pollution from petrochemical, and petrochemical industries. Baker believed that the enormous variety of professions and jobs in which one can
Shahidi Named Distinguished Professor
Sally
2002-08-29T23:59:59.000Z
Methods for the Study of Material Interfacial Motions.” The Purdue Mathematics .... Speaking of industrial support, this fall we will welcome several new members
LANL Distinguished Postdoc Fellows
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is mentored by Stephen Doorn (MPA-CINT). She received her B.S. in Electronic and Computer Engineering Technology from the University of Arkansas at Little Rock (UALR). During...
Mahdy, M R C; Ding, Weiqiang; Mehmood, M Q; Nieto-Vesperinas, Manuel; Qiu, Cheng-Wei
2015-01-01T23:59:59.000Z
To unify and clarify the persistently debated electromagnetic stress tensors (ST) and photon momenta, we establish a theory inspired by the Einstein-Laub formalism inside an arbitrary macroscopic object immersed in any complex medium. Our generalized Einstein-Laub force and ST yield the total force experienced by any generic macroscopic object due to the internal field interacting with its atoms, charges and molecules. Appropriate scenarios are established for the conservation of a newly proposed momentum that we call non-mechanical generalized Einstein-Laub momentum, along with the kinetic and canonical momenta of photons. Our theory remains valid even in a generally heterogeneous or bounded embedding background medium without resorting to hidden momenta, and unambiguously identifies the existence domain, or validity domain, of the STs and photon momenta proposed to date. This existence domain is the region either outside a macroscopic scatterer with only exterior fields, or at its interior with only inside ...
Scudellaro, Paolo
Einstein Equations and Alternative Lagrangians This article has been downloaded from IOPscience LETTERS Europhys. Lett., 32 (2), pp. 185-190 (1995) 10October 1995 Einstein Equations and Alternative of alternative Lagrangians. After proposing an algebraic test, we apply it to both the cases of minimal
Boyer, Edmond
ccsd-00000333(version2):29Apr2003 Schemes for loading a BoseEinstein condensate into a two results are presented. PACS numbers: 03.75.Fi, 05.30.Jp, 32.80.Pj I. INTRODUCTION BoseEinstein, California 90089-0484, USA We propose two loading mechanisms of a degenerate Bose gas into a surface trap
Band, Yehuda B.
Four-wave mixing in Bose-Einstein condensate systems with multiple spin states J. P. Burke, Jr.,* P) We calculate the four-wave mixing (FWM) in a Bose-Einstein condensate system having multiple spin wave packets that are initially overlapping in physical space, but have nonvanishing relative momentum
Einstein-Aether Theory as an Alternative to Dark Energy Model?
Meng, Xin-He
2011-01-01T23:59:59.000Z
In the Einstein-aether theory by taking a special form of the ${\\cal F}({\\cal K})$ (a free function in this theory) the possibility of Einstein-aether theory as an alternative to dark energy model is discussed in details, that is, taking a special Aether field as a dark energy candidate. We compute the joint statistic constraints on this special model's parameters by using the recent type Ia supernovae (SNe Ia) data, the Cosmic Microwave Background (CMB) shift parameter data, and the Baryonic Acoustic Oscillations (BAOs) data traced by the Sloan Digital Sky Survey (SDSS). Furthermore, we analyze other constrains from the observational Hubble parameter data (OHD). The comparison with the standard cosmological model (cosmological constant $\\Lambda$ Cold Dark Matter ($\\Lambda$CDM) model) is clearly shown with new features; also we discuss an interesting relation between the coupling constant M in this model and the possible existence of a special accelerate scale in the MOdified Newtonian Dynamics (MOND) model i...
Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
Aasi, J; Abbott, B P; Abbott, R; Abbott, T D; Abernathy, M; Accadia, T; Acernese, F; Adams, C; Adams, T; Addesso, P; Adhikari, R; Affeldt, C; Agathos, M; Agatsuma, K; Ajith, P; Allen, B; Allocca, A; Ceron, E Amador; Amariutei, D; Anderson, S B; Anderson, W G; Arai, K; Araya, M C; Ast, S; Aston, S M; Astone, P; Atkinson, D; Aufmuth, P; Aulbert, C; Aylott, B E; Babak, S; Baker, P; Ballardin, G; Ballmer, S; Bao, Y; Barayoga, J C B; Barker, D; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barton, M A; Bartos, I; Bassiri, R; Bastarrika, M; Basti, A; Batch, J; Bauchrowitz, J; Bauer, Th S; Bebronne, M; Beck, D; Behnke, B; Bejger, M; Beker, M G; Bell, A S; Bell, C; Belopolski, I; Benacquista, M; Berliner, J M; Bertolini, A; Betzwieser, J; Beveridge, N; Beyersdorf, P T; Bhadbade, T; Bilenko, I A; Billingsley, G; Birch, J; Biswas, R; Bitossi, M; Bizouard, M A; Black, E; Blackburn, J K; Blackburn, L; Blair, D; Bland, B; Blom, M; Bock, O; Bodiya, T P; Bogan, C; Bond, C; Bondarescu, R; Bondu, F; Bonelli, L; Bonnand, R; Bork, R; Born, M; Boschi, V; Bose, S; Bosi, L; Bouhou, B; Braccini, S; Bradaschia, C; Brady, P R; Braginsky, V B; Branchesi, M; Brau, J E; Breyer, J; Briant, T; Bridges, D O; Brillet, A; Brinkmann, M; Brisson, V; Britzger, M; Brooks, A F; Brown, D A; Bulik, T; Bulten, H J; Buonanno, A; Burguet--Castell, J; Buskulic, D; Buy, C; Byer, R L; Cadonati, L; Cagnoli, G; Cagnoli, G; Calloni, E; Camp, J B; Campsie, P; Cannon, K; Canuel, B; Cao, J; Capano, C D; Carbognani, F; Carbone, L; Caride, S; Caudill, S; Cavaglià, M; Cavalier, F; Cavalieri, R; Cella, G; Cepeda, C; Cesarini, E; Chalermsongsak, T; Charlton, P; Chassande-Mottin, E; Chen, W; Chen, X; Chen, Y; Chincarini, A; Chiummo, A; Cho, H S; Chow, J; Christensen, N; Chua, S S Y; Chung, C T Y; Chung, S; Ciani, G; Clara, F; Clark, D E; Clark, J A; Clayton, J H; Cleva, F; Coccia, E; Cohadon, P -F; Colacino, C N; Colla, A; Colombini, M; Conte, A; Conte, R; Cook, D; Corbitt, T R; Cordier, M; Cornish, N; Corsi, A; Costa, C A; Coughlin, M; Coulon, J -P; Couvares, P; Coward, D M; Cowart, M; Coyne, D C; Creighton, J D E; Creighton, T D; Cruise, A M; Cumming, A; Cunningham, L; Cuoco, E; Cutler, R M; Dahl, K; Damjanic, M; Danilishin, S L; D'Antonio, S; Danzmann, K; Dattilo, V; Daudert, B; Daveloza, H; Davier, M; Daw, E J; Day, R; Dayanga, T; De Rosa, R; DeBra, D; Debreczeni, G; Degallaix, J; Del Pozzo, W; Dent, T; Dergachev, V; DeRosa, R; Dhurandhar, S; Di Fiore, L; Di Lieto, A; Di Palma, I; Emilio, M Di Paolo; Di Virgilio, A; Díaz, M; Dietz, A; Dietz, A; Donovan, F; Dooley, K L; Doravari, S; Dorsher, S; Drago, M; Drever, R W P; Driggers, J C; Du, Z; Dumas, J -C; Dwyer, S; Eberle, T; Edgar, M; Edwards, M; Effler, A; Ehrens, P; Endr?czi, G; Engel, R; Etzel, T; Evans, K; Evans, M; Evans, T; Factourovich, M; Fafone, V; Fairhurst, S; Farr, B F; Favata, M; Fazi, D; Fehrmann, H; Feldbaum, D; Ferrante, I; Ferrini, F; Fidecaro, F; Finn, L S; Fiori, I; Fisher, R P; Flaminio, R; Foley, S; Forsi, E; Fotopoulos, N; Fournier, J -D; Franc, J; Franco, S; Frasca, S; Frasconi, F; Frede, M; Frei, M A; Frei, Z; Freise, A; Frey, R; Fricke, T T; Friedrich, D; Fritschel, P; Frolov, V V; Fujimoto, M -K; Fulda, P J; Fyffe, M; Gair, J; Galimberti, M; Gammaitoni, L; Garcia, J; Garufi, F; Gáspár, M E; Gelencser, G; Gemme, G; Genin, E; Gennai, A; Gergely, L Á; Ghosh, S; Giaime, J A; Giampanis, S; Giardina, K D; Giazotto, A; Gil-Casanova, S; Gill, C; Gleason, J; Goetz, E; González, G; Gorodetsky, M L; Goßler, S; Gouaty, R; Graef, C; Graff, P B; Granata, M; Grant, A; Gray, C; Greenhalgh, R J S; Gretarsson, A M; Griffo, C; Grote, H; Grover, K; Grunewald, S; Guidi, G M; Guido, C; Gupta, R; Gustafson, E K; Gustafson, R; Hallam, J M; Hammer, D; Hammond, G; Hanks, J; Hanna, C; Hanson, J; Harms, J; Harry, G M; Harry, I W; Harstad, E D; Hartman, M T; Haughian, K; Hayama, K; Hayau, J -F; Heefner, J; Heidmann, A; Heitmann, H; Hello, P; Hendry, M A; Heng, I S; Heptonstall, A W; Herrera, V; Heurs, M; Hewitson, M; Hild, S; Hoak, D; Hodge, K A; Holt, K; Holtrop, M; Hong, T; Hooper, S; Hough, J; Howell, E J; Hughey, B; Husa, S; Huttner, S H; Huynh-Dinh, T; Ingram, D R; Inta, R; Isogai, T; Ivanov, A; Izumi, K; Jacobson, M; James, E; Jang, Y J; Jaranowski, P; Jesse, E; Johnson, W W; Jones, D I; Jones, R; Jonker, R J G; Ju, L; Kalmus, P; Kalogera, V; Kandhasamy, S; Kang, G; Kanner}, J B; Kasprzack, M; Kasturi, R; Katsavounidis, E; Katzman, W; Kaufer, H; Kaufman, K; Kawabe, K; Kawamura, S; Kawazoe, F; Keitel, D; Kelley, D; Kells, W; Keppel, D G; Keresztes, Z; Khalaidovski, A; Khalili, F Y; Khazanov, E A; Kim, B K; Kim, C; Kim, H; Kim, K; Kim, N; Kim, Y M; King, P J; Kinzel, D L; Kissel, J S; Klimenko, S; Kline, J; Kokeyama, K; Kondrashov, V; Koranda, S; Korth, W Z; Kowalska, I; Kozak, D; Kringel, V; Krishnan, B; Królak, A; Kuehn, G; Kumar, P; Kumar, R; Kurdyumov, R; Kwee, P; Lam, P K; Landry, M; Langley, A; Lantz, B
2012-01-01T23:59:59.000Z
This paper presents results of an all-sky searches for periodic gravitational waves in the frequency range [50, 1190] Hz and with frequency derivative ranges of [-2 \\times 10^-9, 1.1 \\times 10^-10] Hz/s for the fifth LIGO science run (S5). The novelty of the search lies in the use of a non-coherent technique based on the Hough-transform to combine the information from coherent searches on timescales of about one day. Because these searches are very computationally intensive, they have been deployed on the Einstein@Home distributed computing project infrastructure. The search presented here is about a factor 3 more sensitive than the previous Einstein@Home search in early S5 LIGO data. The post-processing has left us with eight surviving candidates. We show that deeper follow-up studies rule each of them out. Hence, since no statistically significant gravitational wave signals have been detected, we report upper limits on the intrinsic gravitational wave amplitude h0. For example, in the 0.5 Hz-wide band at 15...
Recent results on Bose-Einstein correlations by the PHENIX Experiment
Mate Csanad; for the PHENIX Collaboration
2015-03-12T23:59:59.000Z
Bose-Einstein momentum correlation functions of identical bosons reveal the shape and size of the (soft) particle emitting source of the given particle. The widths of these correlation functions are called HBT radii, named after Brown and Twiss who studied the angular diameter of stars via intensity correlations in their radio telescopes. Today, high energy physics experiments measure the HBT radii as a function of many parameters: particle type, transverse momentum, azimuthal angle, collision energy, collision geometry. In this paper we present results from the RHIC PHENIX experiment. These include the observation of strong azimuthal-angle dependence of the extracted Gaussian HBT radii, the similarities and differences between kaon and pion HBT radii. The key point of this paper is the application of Bose-Einstein correlations to the search for the critical point: how HBT radii would show the appearance of a first order phase transition, and what the non-monotonic collision energy dependence of the pion source tells us about the critical point; and how the non-Gaussian shape of correlation functions is related to one of the critical exponents.
Tunable dual-species Bose-Einstein condensates of $^{39}$K and $^{87}$Rb
Wacker, L; Birkmose, D; Horchani, R; Ertmer, W; Klempt, C; Winter, N; Sherson, J; Arlt, J J
2015-01-01T23:59:59.000Z
We present the production of dual-species Bose-Einstein condensates of $^{39}\\mathrm{K}$ and $^{87}\\mathrm{Rb}$. Preparation of both species in the $\\left| F=1,m_F=-1 \\right\\rangle$ state enabled us to exploit a total of three Fesh\\-bach resonances which allows for simultaneous Feshbach tuning of the $^{39}\\mathrm{K}$ intraspecies and the $^{39}\\mathrm{K}$-$^{87}\\mathrm{Rb}$ interspecies scattering length. Thus dual-species Bose-Einstein condensates were produced by sympathetic cooling of $^{39}\\mathrm{K}$ with $^{87}\\mathrm{Rb}$. A dark spontaneous force optical trap was used for $^{87}\\mathrm{Rb}$, to reduce the losses in $^{39}\\mathrm{K}$ due to light-assisted collisions in the optical trapping phase, which can be of benefit for other dual-species experiments. The tunability of the scattering length was used to perform precision spectroscopy of the interspecies Feshbach resonance located at $117.56(2)\\,\\mathrm{G}$ and to determine the width of the resonance to $1.21(5)\\,\\mathrm{G}$ by rethermalization meas...
The Einstein@Home search for radio pulsars and PSR J2007+2722
Allen, B; Cordes, J M; Deneva, J S; Hessels, J W T; Anderson, D; Aulbert, C; Bock, O; Brazier, A; Chatterjee, S; Demorest, P B; Eggenstein, H B; Fehrmann, H; Gotthelf, E V; Hammer, D; Kaspi, V M; Kramer, M; Lyne, A G; Machenschalk, B; McLaughlin, M A; Messenger, C; Pletsch, H J; Ransom, S M; Stairs, I H; Stappers, B W; Bhat, N D R; Bogdanov, S; Camilo, F; Champion, D J; Crawford, F; Desvignes, G; Freire, P C C; Heald, G; Jenet, F A; Lazarus, P; Lee, K J; van Leeuwen, J; Lynch, R; Papa, M A; Prix, R; Rosen, R; Scholz, P; Siemens, X; Stovall, K; Venkataraman, A; Zhu, W
2013-01-01T23:59:59.000Z
Einstein@Home aggregates the computer power of hundreds of thousands of volunteers from 192 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using PALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 min. We also describe the first Einstein@Home discovery, the 40.8 Hz isolated pulsar PSR J2007+2722, and provide a full timing model. PSR J2007+2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but can not prove that PSR J2007+27...
Dilaton minimally coupled to 2 + 1 Einstein Maxwell fields; stationary cyclic symmetric black holes
A. A. Garcia-Diaz; G. Gutierrez Cano
2014-12-17T23:59:59.000Z
Using the Schwarzschild coordinate frame for a static cyclic symmetric metric in 2 + 1 Einstein gravity coupled to a electric Maxwell field and a dilaton logarithmically depending on the radial coordinate in the presence of an exponential potential the general solution of the Einstein Maxwell dilaton equations is derived and it is identified with the Chan Mann charged dilaton solution. Via a general SL(2;R) transformation, applied on the obtained charged dilaton metric, a family of stationary dilaton solutions has been generated; these solutions possess five parameters: dilaton and cosmological constants , charge, momentum, and mass for some values of them. All the exhibited solutions have been characterized by their quasi-local energy, mass, and momentum through their series expansions at spatial infinity. The structural functions determining these solutions increase as the radial coordinate does, hence they do not exhibit an dS AdS behavior at infinity Moreover, the algebraic structure of the Maxwell field, energy-momentum, and Cotton tensors is given explicitly.
Energy distribution of a regular black hole solution in Einstein-nonlinear electrodynamics
I. Radinschi; F. Rahaman; Th. Grammenos; A. Spanou; Sayeedul Islam
2014-07-16T23:59:59.000Z
In this work a study about the energy-momentum of a new four-dimensional spherically symmetric, static and charged, regular black hole solution developed in the context of general relativity coupled to nonlinear electrodynamics is presented. Asymptotically, this new black hole solution behaves as the Reissner-Nordstr\\"om solution only for the particular value {\\mu}=4, where {\\mu} is a positive integer parameter appearing in the mass function of the solution. The calculations are performed by use of the Einstein, Landau-Lifshitz, Weinberg and M{\\o}ller energy-momentum complexes. In all the aforesaid prescriptions, the expressions for the energy of the gravitating system considered depend on the mass M of the black hole, its charge q, a positive integer {\\alpha} and the radial coordinate r. In all these pseudotensorial prescriptions the momenta are found to vanish, while the Landau-Lifshitz and Weinberg prescriptions give the same result for the energy distribution. In addition, the limiting behavior of the energy for the cases r tends toward infinity, r=0 and q=0 is studied. The special case {\\mu}=4 and {\\alpha}=3 is also examined. We conclude that the Einstein and M{\\o}ller energy-momentum complexes can be considered as the most reliable tools for the study of the energy-momentum localization of a gravitating system.
Bose-Einstein condensation in dark power-law laser traps
Amine Jaouadi; Naceur Gaaloul; Bruno Viaris De Lesegno; Mourad Telmini; Laurence Pruvost; Eric Charron
2010-09-10T23:59:59.000Z
We investigate theoretically an original route to achieve Bose-Einstein condensation using dark power-law laser traps. We propose to create such traps with two crossing blue-detuned Laguerre-Gaussian optical beams. Controlling their azimuthal order $\\ell$ allows for the exploration of a multitude of power-law trapping situations in one, two and three dimensions, ranging from the usual harmonic trap to an almost square-well potential, in which a quasi-homogeneous Bose gas can be formed. The usual cigar-shaped and disk-shaped Bose-Einstein condensates obtained in a 1D or 2D harmonic trap take the generic form of a "finger" or of a "hockey puck" in such Laguerre-Gaussian traps. In addition, for a fixed atom number, higher transition temperatures are obtained in such configurations when compared with a harmonic trap of same volume. This effect, which results in a substantial acceleration of the condensation dynamics, requires a better but still reasonable focusing of the Laguerre-Gaussian beams.
Bose-Einstein Condensation and Bose Glasses in an S = 1 Organo-metallic quantum magnet
Zapf, Vivien [Los Alamos National Laboratory
2012-06-01T23:59:59.000Z
I will speak about Bose-Einstein condensation (BEC) in quantum magnets, in particular the compound NiCl2-4SC(NH2)2. Here a magnetic field-induced quantum phase transition to XY antiferromagnetism can be mapped onto BEC of the spins. The tuning parameter for BEC transition is the magnetic field rather than the temperature. Some interesting phenomena arise, for example the fact that the mass of the bosons that condense can be strongly renormalized by quantum fluctuations. I will discuss the utility of this mapping for both understanding the nature of the quantum magnetism and testing the thermodynamic limit of Bose-Einstein Condensation. Furthermore we can dope the system in a clean and controlled way to create the long sought-after Bose Glass transition, which is the bosonic analogy of Anderson localization. I will present experiments and simulations showing evidence for a new scaling exponent, which finally makes contact between theory and experiments. Thus we take a small step towards the difficult problem of understanding the effect of disorder on bosonic wave functions.
Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
J. Aasi; J. Abadie; B. P. Abbott; R. Abbott; T. D. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; T. Adams; P. Addesso; R. Adhikari; C. Affeldt; M. Agathos; K. Agatsuma; P. Ajith; B. Allen; A. Allocca; E. Amador Ceron; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; S. Ast; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. Baker; G. Ballardin; S. Ballmer; Y. Bao; J. C. B. Barayoga; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; A. Basti; J. Batch; J. Bauchrowitz; Th. S. Bauer; M. Bebronne; D. Beck; B. Behnke; M. Bejger; M. G. Beker; A. S. Bell; C. Bell; I. Belopolski; M. Benacquista; J. M. Berliner; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; T. Bhadbade; I. A. Bilenko; G. Billingsley; J. Birch; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; O. Bock; T. P. Bodiya; C. Bogan; C. Bond; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; J. Breyer; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet--Castell; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; G. Cagnoli; E. Calloni; J. B. Camp; P. Campsie; K. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; S. Caudill; M. Cavaglià; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; T. Chalermsongsak; P. Charlton; E. Chassande-Mottin; W. Chen; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; S. Chung; G. Ciani; F. Clara; D. E. Clark; J. A. Clark; J. H. Clayton; F. Cleva; E. Coccia; P. -F. Cohadon; C. N. Colacino; A. Colla; M. Colombini; A. Conte; R. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corsi; C. A. Costa; M. Coughlin; J. -P. Coulon; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; A. Cumming; L. Cunningham; E. Cuoco; R. M. Cutler; K. Dahl; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; B. Daudert; H. Daveloza; M. Davier; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; W. Del Pozzo; T. Dent; V. Dergachev; R. DeRosa; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Díaz; A. Dietz; A. Dietz; F. Donovan; K. L. Dooley; S. Doravari; S. Dorsher; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; J. -C. Dumas; S. Dwyer; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Endröczi; R. Engel; T. Etzel; K. Evans; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; B. F. Farr; M. Favata; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. P. Fisher; R. Flaminio; S. Foley; E. Forsi; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Franco; S. Frasca; F. Frasconi; M. Frede; M. A. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; M. -K. Fujimoto; P. J. Fulda; M. Fyffe; J. Gair; M. Galimberti; L. Gammaitoni; J. Garcia; F. Garufi; M. E. Gáspár; G. Gelencser; G. Gemme; E. Genin; A. Gennai; L. Á. Gergely; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; S. Gil-Casanova; C. Gill; J. Gleason; E. Goetz; G. González; M. L. Gorodetsky; S. Goßler; R. Gouaty; C. Graef; P. B. Graff; M. Granata; A. Grant; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Griffo; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; R. Gupta; E. K. Gustafson; R. Gustafson; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. T. Hartman; K. Haughian; K. Hayama; J. -F. Hayau; J. Heefner; A. Heidmann; H. Heitmann; P. Hello; M. A. Hendry; I. S. Heng; A. W. Heptonstall; V. Herrera; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; K. Holt; M. Holtrop; T. Hong; S. Hooper; J. Hough; E. J. Howell; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; K. Izumi; M. Jacobson; E. James; Y. J. Jang; P. Jaranowski; E. Jesse; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; R. Kasturi; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kaufman; K. Kawabe; S. Kawamura; F. Kawazoe; D. Keitel; D. Kelley; W. Kells; D. G. Keppel; Z. Keresztes; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; B. K. Kim; C. Kim; H. Kim; K. Kim; N. Kim; Y. M. Kim; P. J. King; D. L. Kinzel; J. S. Kissel; S. Klimenko; J. Kline; K. Kokeyama; V. Kondrashov; S. Koranda; W. Z. Korth; I. Kowalska
2012-08-04T23:59:59.000Z
This paper presents results of an all-sky searches for periodic gravitational waves in the frequency range [50, 1190] Hz and with frequency derivative ranges of [-2 x 10^-9, 1.1 x 10^-10] Hz/s for the fifth LIGO science run (S5). The novelty of the search lies in the use of a non-coherent technique based on the Hough-transform to combine the information from coherent searches on timescales of about one day. Because these searches are very computationally intensive, they have been deployed on the Einstein@Home distributed computing project infrastructure. The search presented here is about a factor 3 more sensitive than the previous Einstein@Home search in early S5 LIGO data. The post-processing has left us with eight surviving candidates. We show that deeper follow-up studies rule each of them out. Hence, since no statistically significant gravitational wave signals have been detected, we report upper limits on the intrinsic gravitational wave amplitude h0. For example, in the 0.5 Hz-wide band at 152.5 Hz, we can exclude the presence of signals with h0 greater than 7.6 x 10^-25 with a 90% confidence level.