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Non-Thermal Behavior in Conformal Boundary States
Prepared for submission to JHEP Non-Thermal Behavior in Conformal Boundary States Kevin Kuns and Donald Marolf Department of Physics, University of California, Santa Barbara, CA 93106, U.S.A. E-mail: [email protected], [email protected] Abstract: Cardy has recently observed that certain carefully tuned states of 1+1 CFTs on a timelike strip are periodic with period set by the light-crossing time. The states in question are defined by Euclidean time evolution of conformal boundary states associated with the particular boundary conditions imposed on the edges of the strip. We explain this behavior, and the associated lack of thermalization, by showing that such states are Lorentz-signature conformal transformations of the strip ground state. Taking the long- strip limit implies that states used to model thermalization on the Minkowski plane admit non-thermal conformal extensions beyond future infinity of the Minkowski plane, and thus retain some notion of non-thermal behavior at late times. We also comment on the holo- graphic description of these states. arXiv:1406.4926v2 [cond-mat.stat-mech] 6 Oct 2014 Contents 1 Introduction1 2 Periodicity and Tuned Rectangle States2 2.1 Tuned Rectangle States from Conformal Transformations2 2.2 One-Point Functions5 3 Conformal Transformations to the Thermal Minkowski Plane9 4 Discussion 12 A Holographic Description 13 1 Introduction The rapid change in a quantum system from a Hamiltonian H0 to a Hamiltonian H is known as a quantum quench. Quantum quenches are of experimental interest since they can be studied in laboratory systems involving ultracold atoms. They are also of theoretical interest as examples of out of equilibrium quantum systems whose thermalization, or lack thereof, can be used as a first step towards understanding thermalization in more general quantum systems. -
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The Astronomical Journal, 126:2209–2229, 2003 November E # 2003. The American Astronomical Society. All rights reserved. Printed in U.S.A. A LARGE, UNIFORM SAMPLE OF X-RAY–EMITTING AGNs: SELECTION APPROACH AND AN INITIAL CATALOG FROM THE ROSAT ALL-SKY AND SLOAN DIGITAL SKY SURVEYS Scott F. Anderson,1 Wolfgang Voges,2 Bruce Margon,3 Joachim Tru¨ mper,2 Marcel A. Agu¨ eros,1 Thomas Boller,2 Matthew J. Collinge,4 L. Homer,1 Gregory Stinson,1 Michael A. Strauss,4 James Annis,5 Percy Go´mez,6 Patrick B. Hall,4,7 Robert C. Nichol,6 Gordon T. Richards,4 Donald P. Schneider,8 Daniel E. Vanden Berk,9 Xiaohui Fan,10 Zˇ eljko Ivezic´,4 Jeffrey A. Munn,11 Heidi Jo Newberg,12 Michael W. Richmond,13 David H. Weinberg,14 Brian Yanny,5 Neta A. Bahcall,4 J. Brinkmann,15 Masataka Fukugita,16 and Donald G. York17 Received 2003 May 5; accepted 2003 August 12 ABSTRACT Many open questions in X-ray astronomy are limited by the relatively small number of objects in uniform optically identified and observed samples, especially when rare subclasses are considered or when subsets are isolated to search for evolution or correlations between wavebands. We describe the initial results of a new program aimed to ultimately yield 104 fully characterized X-ray source identifications—a sample about an order of magnitude larger than earlier efforts. The technique is detailed and employs X-ray data from the ROSAT All-Sky Survey (RASS) and optical imaging and spectroscopic follow-up from the Sloan Digital Sky Survey (SDSS); these two surveys prove to be serendipitously very well matched in sensitivity. -
Samantha Scibelli E=Mc Journal Article I've Lived in the Small Town Of
Samantha Scibelli E=mc2 Journal Article I've lived in the small town of Burnt Hills, New York for all of my life. Starting at a young age I developed a love for science. In my spare time I would polish rocks in my rock tumbler. I spent hours digging around my gravel driveway trying to pick out the quartz among the limestone. I also enjoyed analyzing fingerprints with my toy forensic kit. At one point I actually wanted to become a forensic anthropologist (the show Bones was a favorite of mine). My father had a part in helping to propel my scientific interests. He had an old chemistry set and we would do experiments on the weekends. He also would set up his old telescope so we could gaze at the stars. Perhaps that's where my love of astronomy began. My interest in nature also influenced my passion for science. As a little girl I would catch frogs, butterflies, crickets - really anything I could get my hands on. I loved, and still love, fishing at my grandparent's lake, only a couple hours from where I live. Bloody Pond, despite the gruesome name, is where I have had some of my best memories. I've especially enjoyed my time spent looking up at the sky on those clear nights. As I got older I watched documentaries and read books on concepts like light speed and parallel universes, which immediately captured my imagination. I was in awe by how the world works and how we can learn about it through equations and experiments. -
A First Law of Entanglement Rates from Holography
A First Law of Entanglement Rates from Holography Andy O'Bannon,1, ∗ Jonas Probst,2, y Ronnie Rodgers,1, z and Christoph F. Uhlemann3, 4, x 1STAG Research Centre, Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, U. K. 2Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, U. K. 3Department of Physics, University of Washington, Seattle, WA 98195-1560, USA 4Mani L. Bhaumik Institute for Theoretical Physics, Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA For a perturbation of the state of a Conformal Field Theory (CFT), the response of the entanglement entropy is governed by the so-called “first law" of entanglement entropy, in which the change in entanglement entropy is proportional to the change in energy. Whether such a first law holds for other types of perturbations, such as a change to the CFT La- grangian, remains an open question. We use holography to study the evolution in time t of entanglement entropy for a CFT driven by a t-linear source for a conserved U(1) current or marginal scalar operator. We find that although the usual first law of entanglement entropy may be violated, a first law for the rates of change of entanglement entropy and energy still holds. More generally, we prove that this first law for rates holds in holography for any asymptotically (d + 1)-dimensional Anti-de Sitter metric perturbation whose t dependence first appears at order zd in the Fefferman-Graham expansion about the boundary at z = 0. -
Reading in Fall 2003'S Inside Physics
FFromrom thethe ChairChair available in the fall of 2001. Visits elcome to the first edition of our by prospective students nearly newsletter, created to keep us in doubled the number for the newsletter, created to keep us in previous year, and 33 new Wclose touch with our alumni and graduate students appeared in the friends. We’d like to hear your reaction: fall of 2001. We were especially friends. We’d like to hear your reaction: pleased that 30% of the entering what’s satisfying, what’s not, what’s class were women. I hope this is missing. Please let us know. no “fluke” and that we continue missing. Please let us know. to increase the participation of women in physics. The applica- tions for the fall of 2002 number Jim Allen over 500 and we look forward to Department Chair enrolling another strong class. OUR FUTURE Three new faculty joined our als. And Walter himself, the EXCITING TIMES ranks: Crystal Martin, an observa- founding director of the Institute “You can dismiss one Nobel Prize tional astrophysicist from Caltech; for Theoretical Physics, received as a statistical fluke,” Walter Kohn David Stuart, a high energy the 1998 prize in chemistry. remarked, “but a spate of three experimental physicist from Fermi signals something important and Lab; and Dik Bouwmeester from exciting happening at UCSB.” ENDOWED CHAIR Oxford, who works on quantum We are delighted that a chair in The three Nobels reflect UCSB’s optics and experimental quantum experimental physics has been longstanding commitment to information science. We continue endowed by Bruce and Susan excellence in science and engi- to search for new faculty in Worster. -
Quantum Quenches: a Probe of Many-Body Quantum Mechanics
Tata Institute of Fundamental Research Hyderabad Colloquium John Cardy University of California, Berkeley Professor John Cardy is well known for his application of quantum field theory and the renormalization group to condensed matter, especially to critical phenomena in both pure and disordered equilibrium and non-equilibrium systems. In the 1980s he helped develop the theory of conformal invariance and its applications to these problems, ideas which also had an impact in string theory and the physics of black holes. In the 1990s he used conformal invariance to derive many exact results in percolation and related probabilistic problems. More recently Professor Cardy has worked on questions of quantum entanglement and non-equilibrium dynamics in many-body systems. He is a Fellow of the Royal Society, a recipient of the 2000 Dirac Medal of the Institute of Physics, of the 2004 Lars Onsager Prize of the American Physical Society, of the 2010 Boltzmann Medal of the International Union of Pure and Applied Physics, and of the 2011 Dirac Medal and Prize of the International Centre for Theoretical Physics. Professor Cardy has a long-standing association with TIFR, and visited our Mumbai campus in 2007-08 as the Homi Bhabha Chair Professor. Quantum Quenches: a probe of many-body quantum mechanics In a quantum quench, a system is prepared in some state (typically the ground state of an initial hamiltonian) and then evolved coherently with a different hamiltonian, e.g. by instantaneously changing a parameter. Such protocols in many-body systems have recently become experimentally achievable with ultracold atoms. I shall discuss some of the theoretical approaches to this problem, and in particular discuss whether, and in what sense, such systems thermalize. -
Tidal Streams, Dark Matter, and Volunteer Computing with Milkyway
PDF versions of previous colloquia and more information can be found in “events” at http://gcosmo.bao.ac.cn/ 2013 年 第 72 次 / Number 72 2013 TIME: Wednesday, 2:30 PM, Dec. 11 2013 LOCATION: A601 NAOC Tidal Streams, Dark Matter, and volunteer Computing with Milkyway@home Heidi Jo Newberg Professor of Physics, Applied Physics, and Astronomy Rensselaer Polytechnic Institute Dr. Newberg received her PhD in Physics from the University of California at Berkeley in 1992. She then became one of the first postdoctoral researchers in the Sloan Digital Sky Survey (SDSS). She used data from the SDSS to map the positions of stars in the Milky Way galaxy, and discovered that the density of stars in the outer parts of our galaxy is lumpy. Newberg currently heads the Participants in LAMOST, US group, which is partnering with the Large Area Multi-Object fiber Spectrographic Telescope (LAMOST). Her current research is primarily related to understanding the structure of our own galaxy through using A stars as tracers of the galactic halo, and using photometrically determined metallicities of main sequence F-K stars to determine whether the thick disk is chemically distinct from the thin disk and galactic halo of our galaxy. I hope that these studies will contribute to our understanding of how the Galaxy formed. In addition to her research, Dr. Newberg has written several articles on her experiences as a woman scientist and the mother of four children. She is chairman of the Dudley Observatory board of trustees, and has participated in numerous public outreach and educational activities. -
Flowing Along in Four Dimensions 15 November 2011, by Tammy Plotner
Flowing along in four dimensions 15 November 2011, by Tammy Plotner His speculation is the a-theorem… a multitude of avenues in which quantum fields can be energetically excited (a) is always greater at high energies than at low energies. If this theory is correct, then it likely will explain physics beyond the current model and shed light on any possible unknown particles yet to be revealed by the Large Hadron Collider (LHC) at CERN, Europe's particle physics lab near Geneva, Switzerland. "I'm pleased if the proof turns out to be correct," says Cardy, a theoretical physicist at the University of Oxford, UK. "I'm quite amazed the conjecture I made in 1988 stood up." According to theorists Zohar Komargodski and Adam Schwimmer of the Weizmann Institute of Science in Rehovot, Israel, the proof of Cardy's theories was presented July 2011, and is slowly gaining notoriety among the scientific community as other theoretical physicists take note of his work. The a-theorem could help to explain the theory that describes quarks, fundamental particles seen here in a "I think it's quite likely to be right," says Nathan three-dimensional computer-generated simulation. Seiberg, a theoretical physicist at the Institute of Credit: PASIEKA/SPL Advanced Study in Princeton, New Jersey. The field of quantum theory always stands on shaky ground… it seems that no one can be In 1988, John Cardy asked if there was a c- 100% accurate on their guesses of how particles theorem in four dimensions. At the time, he should behave. -
GRB Afterglows and Other Transients in the SDSS Brian C
GRB Afterglows and Other Transients in the SDSS Brian C. Lee, Daniel E. Vanden Berk, Don Lamb, Brian Wilhite, Daniel E. Reichart, John F. Beacom, Douglas L. Tucker, Brian Yanny, Kevork Abazajian, Jennifer Adelman, James Annis, Bing Chen, Mike Harvanek, Arne Henden, Kevin Hurley, Zeljko Ivezic, Robert Kehoe, Scot Kleinman, Richard Kron, Jurek Krzesinski, Dan Long, Timothy McKay, Russet McMillan, Eric H. Neilsen, Peter R. Newman, Atsuko Nitta, Povilas Palunas, Donald P. Schneider, Steph Snedden, James Wren, Don York, John W. Briggs, J. Brinkmann, Istvan Csabai, Greg S. Hennessy, Stephen Kent, Robert Lupton, Heidi Jo Newberg, and Chris Stoughton Citation: AIP Conference Proceedings 662, 349 (2003); doi: 10.1063/1.1579374 View online: https://doi.org/10.1063/1.1579374 View Table of Contents: http://aip.scitation.org/toc/apc/662/1 Published by the American Institute of Physics GRB Afterglows and Other Transients in the SDSS £ Brian C. Lee £ , Daniel E. Vanden Berk ,DonLamb†, Brian Wilhite†,DanielE. £ £ £ Reichart££ , John F. Beacom , Douglas L. Tucker , Brian Yanny ,Kevork £ £ Abazajian£ , Jennifer Adelman , James Annis ,BingChen‡, Mike Harvanek§,Arne Henden¶,KevinHurleyk , Zeljko Ivezic††, Robert Kehoe‡‡, Scot Kleinman§, Richard Kron£ , Jurek Krzesinski§, Dan Long§, Timothy McKay§§, Russet McMillan§,Eric H. Neilsen£ , Peter R. Newman§, Atsuko Nitta§, Povilas Palunas¶¶, Donald P. Schneider£££ , Steph Snedden§, James Wren†††,DonYork†, John W. Briggs‡‡‡,J. Brinkmann§, Istvan Csabai‡,GregS.Hennessy§§§, Stephen Kent £ , Robert Lupton††, Heidi Jo Newberg¶¶¶ and Chris Stoughton £ £ Experimental Astrophysics Group, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 †Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 ££ Palomar Observatory, 105-24, California Institute of Technology, Pasadena, CA 91125 ‡Department of Physics and Astronomy, Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218 §Apache Point Observatory, P.O. -
Heidi Jo Newberg Jeffrey L. Carlin Editors Observations And
Astrophysics and Space Science Library 420 Heidi Jo Newberg Jeffrey L. Carlin Editors Tidal Streams in the Local Group and Beyond Observations and Implications Astrophysics and Space Science Library Volume 420 Editorial Board Chairman W.B. Burton, National Radio Astronomy Observatory, Charlottesville, VA, USA ([email protected]); University of Leiden, The Netherlands ([email protected]) F. Bertola, University of Padua, Italy C.J. Cesarsky, Commission for Atomic Energy, Saclay, France P. Ehrenfreund, Leiden University, The Netherlands O. Engvold, University of Oslo, Norway A. Heck, Strasbourg Astronomical Observatory, France E.P.J. Van Den Heuvel, University of Amsterdam, The Netherlands V. M . K a sp i , McGill University, Montreal, Canada J.M.E. Kuijpers, University of Nijmegen, The Netherlands H. Van Der Laan, University of Utrecht, The Netherlands P.G. Murdin, Institute of Astronomy, Cambridge, UK B.V. Somov, Astronomical Institute, Moscow State University, Russia R.A. Sunyaev, Space Research Institute, Moscow, Russia More information about this series at http://www.springer.com/series/5664 Heidi Jo Newberg • Jeffrey L. Carlin Editors Tidal Streams in the Local Group and Beyond Observations and Implications 123 Editors Heidi Jo Newberg Jeffrey L. Carlin Department of Physics, Applied Physics Department of Physics, Applied Physics and Astronomy and Astronomy Rensselaer Polytechnic Institute Rensselaer Polytechnic Institute Troy, NY, USA Troy, NY, USA ISSN 0067-0057 ISSN 2214-7985 (electronic) Astrophysics and Space Science Library ISBN 978-3-319-19335-9 ISBN 978-3-319-19336-6 (eBook) DOI 10.1007/978-3-319-19336-6 Library of Congress Control Number: 2015956760 Springer Cham Heidelberg New York Dordrecht London © Springer International Publishing Switzerland 2016 This work is subject to copyright. -
THE FIFTH DATA RELEASE of the SLOAN DIGITAL SKY SURVEY Jennifer K
The Astrophysical Journal Supplement Series, 172:634–644, 2007 October A # 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A. THE FIFTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY Jennifer K. Adelman-McCarthy,1 Marcel A. Agu¨eros,2 Sahar S. Allam,1,3 Kurt S. J. Anderson,4 Scott F. Anderson,2 James Annis,1 Neta A. Bahcall,5 Coryn A. L. Bailer-Jones,6 Ivan K. Baldry,7,8 J. C. Barentine,4 Timothy C. Beers,9 V. Belokurov,10 Andreas Berlind,11 Mariangela Bernardi,12 Michael R. Blanton,11 John J. Bochanski,2 William N. Boroski,1 D. M. Bramich,10 Howard J. Brewington,4 Jarle Brinchmann,13 J. Brinkmann,4 Robert J. Brunner,14 Tama´s Budava´ri,8 Larry N. Carey,2 Samuel Carliles,8 Michael A. Carr,5 Francisco J. Castander,15 A. J. Connolly,16 R. J. Cool,17 Carlos E. Cunha,18,19 Istva´nCsabai,8,20 Julianne J. Dalcanton,2 Mamoru Doi,21 Daniel J. Eisenstein,17 Michael L. Evans,2 N. W. Evans,10 Xiaohui Fan,17 Douglas P. Finkbeiner,5 Scott D. Friedman,22 Joshua A. Frieman,1,18,19 Masataka Fukugita,23 Bruce Gillespie,4 G. Gilmore,10 Karl Glazebrook,8 Jim Gray,24 Eva K. Grebel,25 James E. Gunn,5 Ernst de Haas,5 Patrick B. Hall,26 Michael Harvanek,4 Suzanne L. Hawley,2 Jeffrey Hayes,27 Timothy M. Heckman,8 John S. Hendry,1 Gregory S. Hennessy,28 Robert B. Hindsley,29 Christopher M. Hirata,30 Craig J. Hogan,2 David W. -
THE FOURTH DATA RELEASE of the SLOAN DIGITAL SKY SURVEY Jennifer K
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Repository of Faculty of Science, University of Zagreb The Astrophysical Journal Supplement Series, 162:38–48, 2006 January # 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A. THE FOURTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY Jennifer K. Adelman-McCarthy,1 Marcel A. Agu¨eros,2 Sahar S. Allam,1,3 Kurt S. J. Anderson,4,5 Scott F. Anderson,2 James Annis,1 Neta A. Bahcall,6 Ivan K. Baldry,7 J. C. Barentine,4 Andreas Berlind,8 Mariangela Bernardi,9 Michael R. Blanton,8 William N. Boroski,1 Howard J. Brewington,4 Jarle Brinchmann,10 J. Brinkmann,4 Robert J. Brunner,11 Tama´s Budava´ri,7 Larry N. Carey,2 Michael A. Carr,6 Francisco J. Castander,12 A. J. Connolly,13 Istva´n Csabai,7,14 Paul C. Czarapata,1 Julianne J. Dalcanton,2 Mamoru Doi,15 Feng Dong,6 Daniel J. Eisenstein,16 Michael L. Evans,2 Xiaohui Fan,16 Douglas P. Finkbeiner,6 Scott D. Friedman,17 Joshua A. Frieman,1,18,19 Masataka Fukugita,20 Bruce Gillespie,4 Karl Glazebrook,7 Jim Gray,21 Eva K. Grebel,22 James E. Gunn,6 Vijay K. Gurbani,1,23 Ernst de Haas,6 Patrick B. Hall,24 Frederick H. Harris,25 Michael Harvanek,4 Suzanne L. Hawley,2 Jeffrey Hayes,26 John S. Hendry,1 Gregory S. Hennessy,27 Robert B. Hindsley,28 Christopher M. Hirata,29 Craig J. Hogan,2 David W.