Scientific Report for 2008
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
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. -
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. -
Chemistry NEWSLETTER
University of Michigan DEPARTMENT OF Chemistry NEWSLETTER Letter from the Chair Greetings from Ann Arbor and the chemical biology. In addition to these that Jim has done. He will be replaced by Department of Chemistry. After one full two outstanding senior hires, we welcome Professor Masato Koreeda. Professor year as Department Chair, I have come to Dr. Larry Beck from Cal Tech as the Dow Mark Meyerhoff will continue as Associ- realize the full scope of this administra- CorningAssistant Professor of analytical ate Chair for Graduate Student Affairs for tive challenge. It’s been a very busy and chemistry in September. Larry brings a another year after which he will take a exciting year as we forge ahead to meet broad spectrum of research expertise in well deserved sabbatical leave. the goals and implement the plans set out solid state NMR, zeolites and We have had another excellent year for in our new 5-year plan. nanostructures. Faculty recruiting will recruiting graduate students. In the fall, One of the most ambitious parts of our continue at a vigorous pace in the coming 45 new Ph.D. students will join the De- plan is the recruitment of new faculty at year with no less than four searches in the partment. This summer has also been a the senior and junior levels. During the area of theoretical physical chemistry, very productive one for undergraduate past year, Professor William Roush organic and chemical biology and inor- research participation with a total of 20 settled in the Department as the first ganic/materials chemistry. -
ELEMENTARY EQUIVALENCE of PROFINITE GROUPS by Moshe
ELEMENTARY EQUIVALENCE OF PROFINITE GROUPS by Moshe Jarden, Tel Aviv University∗ and Alexander Lubotzky, The Hebrew University of Jerusalem∗∗ Dedicated to Dan Segal on the occasion of his 60th birthday Abstract. There are many examples of non-isomorphic pairs of finitely generated abstract groups that are elementarily equivalent. We show that the situation in the category of profinite groups is different: If two finitely generated profinite groups are elementarily equivalent (as abstract groups), then they are isomorphic. The proof ap- plies a result of Nikolov and Segal which in turn relies on the classification of the finite simple groups. Our result does not hold any more if the profinite groups are not finitely generated. We give concrete examples of non-isomorphic profinite groups which are elementarily equivalent. MR Classification: 12E30 Directory: \Jarden\Diary\JL 3 June, 2008 * Supported by the Minkowski Center for Geometry at Tel Aviv University, established by the Minerva Foundation. ** Supported by the ISF and the Landau Center for Analysis at the Hebrew University of Jerusalem. Introduction Let L(group) be the first order language of group theory. One says that groups G and H are elementarily equivalent and writes G ≡ H if each sentence of L(group) which holds in one of these groups holds also the other one. There are many examples of pairs of elementarily equivalent groups which are not isomorphic. For example, the group Z is elementarily equivalent to every nonprincipal ultrapower of it although it is not isomorphic to it. Less trivial examples are given by the following result: If G and H are groups satisfying G × Z =∼ H × Z, then G ≡ H [Oge91] (see [Hir69] for an example of non-isomorphic groups G and H satisfying G × Z =∼ H × Z.) More generally, Nies points out in [Nie03, p. -
Fundamental Theorems in Mathematics
SOME FUNDAMENTAL THEOREMS IN MATHEMATICS OLIVER KNILL Abstract. An expository hitchhikers guide to some theorems in mathematics. Criteria for the current list of 243 theorems are whether the result can be formulated elegantly, whether it is beautiful or useful and whether it could serve as a guide [6] without leading to panic. The order is not a ranking but ordered along a time-line when things were writ- ten down. Since [556] stated “a mathematical theorem only becomes beautiful if presented as a crown jewel within a context" we try sometimes to give some context. Of course, any such list of theorems is a matter of personal preferences, taste and limitations. The num- ber of theorems is arbitrary, the initial obvious goal was 42 but that number got eventually surpassed as it is hard to stop, once started. As a compensation, there are 42 “tweetable" theorems with included proofs. More comments on the choice of the theorems is included in an epilogue. For literature on general mathematics, see [193, 189, 29, 235, 254, 619, 412, 138], for history [217, 625, 376, 73, 46, 208, 379, 365, 690, 113, 618, 79, 259, 341], for popular, beautiful or elegant things [12, 529, 201, 182, 17, 672, 673, 44, 204, 190, 245, 446, 616, 303, 201, 2, 127, 146, 128, 502, 261, 172]. For comprehensive overviews in large parts of math- ematics, [74, 165, 166, 51, 593] or predictions on developments [47]. For reflections about mathematics in general [145, 455, 45, 306, 439, 99, 561]. Encyclopedic source examples are [188, 705, 670, 102, 192, 152, 221, 191, 111, 635]. -
Two Hundred and Twenty-Second Commencement for the Conferring of Degrees
UNIVERSITY of PENNSYLVANIA Two Hundred and Twenty-Second Commencement for the Conferring of Degrees PHILADELPHIA CIVIC CENTER CONVENTION HALL Monday, May 22, 1978 10:00 A.M. Guests will find this diagram helpful in locating in the Contents on the opposite page under Degrees the approximate seating of the degree candidates. in Course. Reference to the paragraph on page The seating roughly corresponds to the order by seven describing the colors of the candidates school in which the candidates for degrees are hoods according to their fields of study may further presented, beginning at top left with the Faculty of assist guests in placing the locations of the various Arts and Sciences. The actual sequence is shown schools. Contents Page Seating Diagram of the Graduating Students 2 The Commencement Ceremony 4 Commencement Notes 6 Degrees in Course 8 The Faculty of Arts and Sciences 8 The College of General Studies 16 The College of Engineering and Applied Science 17 The Wharton School 23 The Wharton Evening School 27 The Wharton Graduate Division 28 The School of Nursing 33 The School of Allied Medical Professions 35 The Graduate Faculties 36 The School of Medicine 41 The Law School 42 The Graduate School of Fine Arts 44 The School of Dental Medicine 47 The School of Veterinary Medicine 48 The Graduate School of Education 49 The School of Social Work 51 The Annenberg School of Communications 52 Certificates 53 General Honors Program 53 Medical Technology 53 Occupational Therapy 54 Physical Therapy 56 Dental Hygiene 57 Advanced Dental Education 57 Social Work 58 Commissions 59 Army 59 Navy 60 Principal Undergraduate Academic Honor Societies 61 Prizes and Awards 64 Class of 1928 69 Events Following Commencement 71 The Commencement Marshals 72 Academic Honors Insert The Commencement Ceremony MUSIC Valley Forge Military Academy and Junior College Band CAPTAIN JAMES M. -
Digital Object, Digital Subjects
DIGITAL OBJECTS DIGITAL SUBJECTS Interdisciplinary Perspectives on Capitalism, Labour and Politics in the Age of Big Data Edited by DAVID CHANDLER and CHRISTIAN FUCHS Digital Objects, Digital Subjects: Interdisciplinary Perspectives on Capitalism, Labour and Politics in the Age of Big Data Edited by David Chandler and Christian Fuchs University of Westminster Press www.uwestminsterpress.co.uk Published by University of Westminster Press 101 Cavendish Street London W1W 6UW www.uwestminsterpress.co.uk Text ©the editors and several contributors 2019 First published 2019 Cover: Diana Jarvis Printed in the UK by Lightning Source Ltd. Print and digital versions typeset by Siliconchips Services Ltd. ISBN (Hardback): 978-1-912656-08-0 ISBN (PDF): 978-1-912656-09-7 ISBN (EPUB): 978-1-912656-10-3 ISBN (Kindle): 978-1-912656-11-0 ISBN (Paperback): 978-1-912656-20-2 DOI: https://doi.org/10.16997/book29 This work is licensed under the Creative Commons Attribution-NonCommercial- NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA. This license allows for copying and distributing the work, providing author attribution is clearly stated, that you are not using the material for commercial purposes, and that modified versions are not distributed. The full text of this book has been peer-reviewed to ensure high academic standards. For full review policies, see: http://www.uwestminsterpress.co.uk/ site/publish. Competing Interests: the editors and contributors declare that they have no competing interests in publishing this book Suggested citation: Chandler, D. -
Worlds Apart: How the Distance Between Science and Journalism Threatens America's Future
Worlds Apart Worlds Apart HOW THE DISTANCE BETWEEN SCIENCE AND JOURNALISM THREATENS AMERICA’S FUTURE JIM HARTZ AND RICK CHAPPELL, PH.D. iv Worlds Apart: How the Distance Between Science and Journalism Threatens America’s Future By Jim Hartz and Rick Chappell, Ph.D. ©1997 First Amendment Center 1207 18th Avenue South Nashville, TN 37212 (615) 321-9588 www.freedomforum.org Editor: Natilee Duning Designer: David Smith Publication: #98-F02 To order: 1-800-830-3733 Contents Foreword vii Scientists Needn’t Take Themselves Seriously To Do Serious Science 39 Introduction ix Concise writing 40 Talk to the customers 41 Overview xi An end to infighting 42 The incremental nature of science 43 The Unscientific Americans 1 Scientific Publishing 44 Serious omissions 2 Science and the Fourth Estate 47 The U.S. science establishment 4 Public disillusionment 48 Looking ahead at falling behind 5 Spreading tabloidization 48 Out of sight, out of money 7 v Is anybody there? 8 Unprepared but interested 50 The regional press 50 The 7 Percent Solution 10 The good science reporter 51 Common Denominators 13 Hooked on science 52 Gauging the Importance of Science 53 Unfriendly assessments 13 When tortoise meets hare 14 Media Gatekeepers 55 Language barriers 15 Margin of error 16 The current agenda 55 Objective vs. subjective 17 Not enough interest 57 Gatekeepers as obstacles 58 Changing times, concurrent threats 17 What does the public want? 19 Nothing Succeeds Like Substance 60 A new interest in interaction 20 Running Scared 61 Dams, Diversions & Bottlenecks 21 Meanwhile, -
• KUDOS for CHAOS "Highly Entertaining ... a Startling
• KUDOS FOR CHAOS "Highly entertaining ... a startling look at newly discovered universal laws" —Chicago Tribune Book World "I was caught up and swept along by the flow of this astonishing chronicle of scientific thought. It has been a long, long time since I finished a book and immediately started reading it all over again for sheer pleasure." —Lewis Thomas, author of Lives of a Cell "Chaos is a book that deserves to be read, for it chronicles the birth of a new scientific technique that may someday be important." —The Nation "Gleick's Chaos is not only enthralling and precise, but full of beautifully strange and strangely beautiful ideas." —Douglas Hofstadter, author of Godel, Escher, Bach "Taut and exciting ... it is a fascinating illustration of how the pattern of science changes." —The New York Times Book Review "Admirably portrays the cutting edge of thought" —Los Angeles Times "This is a stunning work, a deeply exciting subject in the hands of a first-rate science writer. The implications of the research James Gleick sets forth are breathtaking." —Barry Lopez, author of Arctic Dreams "An ambitious and largely successful popular science book that deserves wide readership" — Chicago Sun-Times "There is a teleological grandeur about this new math that gives the imagination wings." —Vogue "It is a splendid introduction. Not only does it explain accurately and skillfully the fundamentals of chaos theory, but it also sketches the theory's colorful history, with entertaining anecdotes about its pioneers and provocative asides about the philosophy of science and mathematics." —The Boston Sunday Globe PENGUIN BOOKS CHAOS James Gleick was born in New York City and lives there with his wife, Cynthia Crossen. -
Tel-Aviv University Evaluation Report
The Committee for the Evaluation of Mathematics Study-Programs Tel-Aviv University Evaluation Report August 2010 Contents Chapter 1: Background……………………………………………………………2 Chapter 2: Committee Procedures………...………………………………………3 Chapter 3: Evaluation of the School of Mathematical Sciences, Tel-Aviv University……………………………………………….......................4 Appendices: Appendix 1 – Letter of Appointment Appendix 2 - Schedule of the visit 1 Chapter 1 - Background At its meeting on October 07, 2008 the Council for Higher Education (CHE) decided to evaluate study programs in the fields of mathematics during the academic year 2009-2010. Following the decision of the CHE, the Minister of Education, who serves ex officio as a Chairperson of the CHE, appointed a Committee consisting of: • Prof. Benedict H. Gross, Mathematics Department, Harvard University, USA - Chair • Prof. Ronald Coifman, Department of Mathematics and the Department of Computer Science, Yale University, USA • Prof. Hillel Furstenberg (emeritus), Department of Mathematics, the Hebrew University, Israel • Prof. Gerard van der Geer, Korteweg-de Vries Institute for Mathematics, University of Amsterdam, the Netherlands • Prof. David Jerison1, Mathematics Departments, Massachusetts Institute of Technology, USA • Prof. Yakar Kannai, Department of Mathematics, Faculty of Mathematics and Computer Science, Weizmann Institute, Israel Ms. Noa Nof Steiner - Coordinator of the Committee on behalf of the Council for Higher Education. Within the framework of its activity, the Committee was requested to:2 1. Examine the self-evaluation reports, submitted by the institutions that provide study programs in mathematics, and to conduct on-site visits at those institutions. 2. Submit to the CHE an individual report on each of the evaluated academic units and study programs, including the Committee's findings and recommendations.