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Institut Des Hautes Ét Udes Scientifiques
InstItut des Hautes É t u d e s scIentIfIques A foundation in the public interest since 1981 2 | IHES IHES | 3 Contents A VISIONARY PROJECT, FOR EXCELLENCE IN SCIENCE P. 5 Editorial P. 6 Founder P. 7 Permanent professors A MODERN-DAY THELEMA FOR A GLOBAL SCIENTIFIC COMMUNITY P. 8 Research P. 9 Visitors P. 10 Events P. 11 International INDEPENDENCE AND FREEDOM, THE INSTITUTE’S TWO OPERATIONAL PILLARS P. 12 Finance P. 13 Governance P. 14 Members P. 15 Tax benefits The Marilyn and James Simons Conference Center The aim of the Foundation known as ‘Institut des Hautes Études Scientifiques’ is to enable and encourage theoretical scientific research (…). [Its] activity consists mainly in providing the Institute’s professors and researchers, both permanent and invited, with the resources required to undertake disinterested IHES February 2016 Content: IHES Communication Department – Translation: Hélène Wilkinson – Design: blossom-creation.com research. Photo Credits: Valérie Touchant-Landais / IHES, Marie-Claude Vergne / IHES – Cover: unigma All rights reserved Extract from the statutes of the Institut des Hautes Études Scientifiques, 1958. 4 | IHES IHES | 5 A visionary project, for excellence in science Editorial Emmanuel Ullmo, Mathematician, IHES Director A single scientific program: curiosity. A single selection criterion: excellence. The Institut des Hautes Études Scientifiques is an international mathematics and theoretical physics research center. Free of teaching duties and administrative tasks, its professors and visitors undertake research in complete independence and total freedom, at the highest international level. Ever since it was created, IHES has cultivated interdisciplinarity. The constant dialogue between mathematicians and theoretical physicists has led to particularly rich interactions. -
Radiotélescopes Seek Cosmic Rays
INTERNATIONAL JOURNAL OF HIGH-ENERGY PHYSICS CERN COURIER Radiotélescopes seek cosmic rays COMPUTING MEDICAL IMAGING NUCLEAR MASSES Information technology and Spin-off from particle physics Precision measurements from physics advance together pl6 wins awards p23 accelerator experiments p26 Multichannel GS/s data acquisition systems used For more information, to be expensive. They also would fill up entire visit our Web site at www.acqiris.com instrument racks with power-hungry electronics. But no more. We have shrunk the size, lowered 1)Rackmount kit available the cost, reduced the power consumption and incorporated exceptional features such as clock synchronization and complete trigger distribution.1) A single crate (no bigger than a desktop PC) can house up to 24 channels at 500MS/S or 1 GS/s when deploying an embedded processor, or up to 28 channels (14 at 2GS/s) using a PCI interface. CONTENTS Covering current developments in high- energy physics and related fields worldwide CERN Courier is distributed to Member State governments, institutes and laboratories affiliated with CERN, and to their personnel. It is published monthly except January and August, in English and French editions. The views expressed are not CERN necessarily those of the CERN management. Editor: Gordon Fraser CERN, 1211 Geneva 23, Switzerland E-mail [email protected] Fax +41 (22) 782 1906 Web http://www.cerncourier.com News editor: James Gillies COURIER VOLUME 41 NUMBER 3 APRIL 2001 Advisory Board: R Landua (Chairman), F Close, E Lillest0l, H Hoffmann, C Johnson, -
Reflections on the Renormalization Procedure for Gauge Theories
Reflections on the renormalization procedure for gauge theories Gerard ’t Hooft Institute for Theoretical Physics EMMEΦ Centre for Extreme Matter and Emergent Phenomena Science Faculty Utrecht University POBox 80.195 3808TD, Utrecht The Netherlands Internet: http://www.staff.science.uu.nl/˜hooft101/ In memory of Raymond Stora 1930 – 2015 Abstract Various pieces of insight were needed to formulate the rules for working with gauge theories of the electro-magnetic, weak and strong forces. First, it was needed to understand how to formulate the Feynman rules. We had to learn that there are many different ways to derive them, and it was needed to know arXiv:1604.06257v1 [hep-th] 21 Apr 2016 how different formulations of the gauge constraint lead to the same final re- sults: the calculated values of the scattering amplitudes. The rules for dealing with the infinities that had to be subtracted were a big challenge, culminating in the discovery of the Becchi-Rouet-Stora-Tyutin symmetry. Fond recollec- tions of the numerous discussions the author had with Raymond Stora on this topic are memorised here. We end with some reflections on the mathematical status of quantum field theories, and a letter sent by Stora to the author. Version: March 2016 Last typeset: April 22, 2016 1 1 Introduction Around the year 1970, rapid changes took place in our views of elementary particle physics, and in particular the role of local gauge theories and spontaneous symmetry breaking in these theories. For a long time, only few researchers had been convinced that quantum field theory was the way to go. -
Notas De Fisica CBPF-NF-058/99 November 1999
ISSN 0029-3865 BR0040497 CBPF - CENTRO BRASILEIRO PE PESQUISAS FISICAS Rio de Janeiro Notas de Fisica CBPF-NF-058/99 November 1999 New Concepts in Particle Physics from Solution of an Old Problem Bert Schroer 31/43 CNPq - Conselho Nacional de Desenvolvimento Cientifico e Tecnologico New Concepts in Particle Physics from Solution of an Old Problem Bert Schroer Institut fur Theoretische Physik FU-Berlin, Arnimallee 14, 14195 Berlin, Germany presently: CBPF, Rua Dr. Xavier Sigaud, 22290-180 Rio de Janeiro, Brazil [email protected] July 1999 Abstract Recent ideas on modular localization in local quantum physics are used to clarify the relation between on- and off-shell quantities in particle physics; in particular the relation between on-shell crossing symmetry and off-shell Einstein causality. Among the collateral results of this new non- perturbative approach are profound relations between crossing symmetry of particle physics and Hawking-Unruh like thermal aspects (KMS property, entropy attached to horizons) of quantum mat- ter behind causal horizons which hitherto were more related with Killing horizons in curved spacetime than with localization aspects in Minkowski space particle physics. The scope of this framework is wide and ranges from providing a conceptual basis for the d=l+l bootstrap-formfactor program for factorizable d=l+l models to a decomposition theory of QFT's in terms of a finite collection of unitarily equivalent chiral conformal theories placed a specified relative position within a common Hilbert space (in d=l+l a holographic relation and in higher dimensions more like a scanning). Al- though different from string theory, some of its concepts originated as string theory in the aftermath of the ill-fated S-matrix bootstrap approch of the 6O'es. -
Reflections on the Renormalization Procedure for Gauge Theories
Available online at www.sciencedirect.com ScienceDirect Nuclear Physics B 912 (2016) 4–14 www.elsevier.com/locate/nuclphysb Reflections on the renormalization procedure for gauge theories Gerard ’t Hooft Institute for Theoretical Physics, EMMEΦ, Centre for Extreme Matter and Emergent Phenomena, Science Faculty, Utrecht University, P.O. Box 80.195, 3808TD, Utrecht, The Netherlands Received 4 April 2016; accepted 6 April 2016 Available online 12 April 2016 Editor: Hubert Saleur In memory of Raymond Stora 1930–2015 Abstract Various pieces of insight were needed to formulate the rules for working with gauge theories of the electro-magnetic, weak and strong forces. First, it was needed to understand how to formulate the Feynman rules. We had to learn that there are many different ways to derive them, and it was needed to know how different formulations of the gauge constraint lead to the same final results: the calculated values of the scattering amplitudes. The rules for dealing with the infinities that had to be subtracted were a big chal- lenge, culminating in the discovery of the Becchi–Rouet–Stora–Tyutin symmetry. Fond recollections of the numerous discussions the author had with Raymond Stora on this topic are memorised here. We end with some reflections on the mathematical status of quantum field theories, and the transcription of a letter by R. Stora to the author. © 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. 1. Introduction Around the year 1970, rapid changes took place in our views of elementary particle physics, and in particular the role of local gauge theories and spontaneous symmetry breaking in these theories. -
CV Alfred Kastler
Curriculum Vitae Prof. Dr. Alfred Kastler Name: Alfred Kastler Lebensdaten: 3. Mai 1902 ‐ 7. Januar 1984 Alfred Kastler war ein französischer Physiker. Seine Arbeiten bildeten die Grundlage für die Entwicklung von Maser und Laser. Für die Entdeckung und Entwicklung optischer Methoden zum Studium der elektromagnetischen Resonanzen in Atomen wurde er 1966 mit dem Nobelpreis für Physik ausgezeichnet. Akademischer und beruflicher Werdegang Alfred Kastler studierte von 1921 bis 1926 Physik an der École Normale Supérieure (ENS) in Paris. Anschließend war er als Physiklehrer tätig, zunächst an einem Lyceum in Mühlhausen, später in Colmar und Bordeaux. 1931 wurde er Assistent an der Universität Bordeaux. Von 1936 bis 1938 war er an der Universität in Clemont‐Ferrand tätig. 1938 bekam er eine Professur an der Universität in Bordeaux. Dort beschäftigte er sich mit dem Verfahren der Atomspektroskopie. 1941 ging er nach Paris, wo er die Physik‐Abteilung an der École Normale Supérieure in Paris leitete, die er als junger Mann selbst absolviert hatte. Von 1951 bis zu seinem Rücktritt 1972 war er Direktor des Laboratoire de Spectroscopie Hertzienne des ENS, das heute seinen Namen trägt. 1952 wurde er außerdem Professor an der Faculté de Science in Paris. In den Jahren 1953/54 war er als Gastprofessor an der Universität im belgischen Löwen tätig. Gemeinsam mit seinem Kollegen Jean Brossel entwickelte er spektroskopische Methoden in der Atomphysik, so etwa die Doppelresonanzmethode sowie den physikalischen Effekt des optischen Pumpens. Dieser bewirkt eine Besetzungsinversion durch optische Anregung und bildet zugleich die Grundlagen für die Theorie des Maser‐ sowie des Laserstrahls. Von 1968 bis 1972 war Kastler außerdem Direktor der französischen Forschungsorganisation Centre National de la Recherche Scientifique (CNRS). -
Rudolf Haag's Legacy of Local Quantum Physics And
Rudolf Haag’s legacy of Local Quantum Physics and reminiscences about a cherished teacher and friend In memory of Rudolf Haag (1922-2016) submitted to the Eur. Phys. J. H Bert Schroer permanent address: Institut f¨ur Theoretische Physik FU-Berlin, Arnimallee 14, 14195 Berlin, Germany November 2016 Abstract After some personal recollectioms about Rudolf Haag and his thoughts which led him to ”Local Quantum Physics”, the present work recalls his ideas about scattering theory, the relation between local observables and localized fields and his contributions to the physical aspects of modu- lar operator theory which paved the way for an intrisic understanding of quantum causal localization in which fields ”coordinatize” the local algebras. The paper ends with the presentation of string-local fields whose con- struction and use in a new renormalization theory for higher spin fields is part of an ongoing reformulation of gauge theory in the conceptual setting of Haag’s LQP. 1 First encounter with Rudolf Haag arXiv:1612.00003v1 [math-ph] 30 Nov 2016 On his return from the Niels Bohr Institute in Copenhagen to the University of Munich Rudolf Haag passed through Hamburg to meet his colleague Harry Lehmann, at that time the newly appointed successor of Wilhelm Lenz who held the chair of theoretical physics since the 1920 foundation of the University of Hamburg. It was the year 1958 shortly after the decision to construct the DESY particle accelerator in Hamburg which created a lot of excitement. I had nearly completed my diploma thesis under Lehmann and begun to worry about my career. -
Jahrbuch Der Akademie Der Wissenschaften Zu Göttingen 2012
Jahrbuch der Akademie der Wissenschaften zu Göttingen DerMuse Polyhymnia wirdnachgesagt, dass sie Schreibenden Ruhm bringt, deren Werkesie für unsterblich hält. Aufsuchen kann man die Göt- tin der Hymnendichtung, des Tanzes, der Pantomime und der Geometrie im Akademiesaal in der Aula der Universität Göttingen. DieOrdentlichen Mitglieder der Akademie der Wissenschaften zu Göttingen begeben sich re- gelmäßig zu ihren Plenarsitzungen dorthin. Polyhymnia ist unter den neun Musen, die den Saal als Wandbemalung zieren, als jene zu erkennen, die sich mitdem Ellenbogen auf einen Baumstamm stützt. Wiedie anderen Gemälde des Sitzungszimmers geht auch die Abbildung der Polyhymnia auf ein antikes Vorbild zurück. DasVorbildfür die Göttinger Polyhymnia findet man in dem Musenrelief eines römischen Sarkophags im Louvre. JAHRBUCH DER AKADEMIE DER WISSENSCHAFTEN ZU GÖTTINGEN 2012 De Gruyter Akademie der Wissenschaften zu Göttingen Theaterstraße 7 37073 Göttingen Telefon: 0551-39-5424 Fax: 0551-39-5365 E-Mail: [email protected] http://www.adw-goe.de Verantwortlich: DerPräsidentder Akademie der Wissenschaften ISSN 0373-9767 LibraryofCongress Cataloging-in-Publication Data: ACIP catalog recordfor this book has been applied for at the LibraryofCongress Bibliografische Information der Deutschen Nationalbibliothek DieDeutsche Nationalbibliothek verzeichnet diesePublikation in der Deutschen Nationalbibliografie; detaillierte bibliografische Daten sind im Internet über http://dnb.dnb.de abrufbar. ©2014 Walter de Gruyter GmbH &Co. KG,Berlin/Boston Satz: PTP-Berlin Protago -
Some Considerations in the Quantization of General Relativity
The dissertation committee for Thomas Judson McClain II certifies that this is the approved version of the following dissertation: Some Considerations in the Quantization of General Relativity Committee: Richard Matzner, Supervisor Duane Dicus Austin Gleeson Richard Hazeltine Paul Shapiro Some Considerations in the Quantization of General Relativity by Thomas Judson McClain II Dissertation Presented to the Faculty of the Graduate School of the University of Texas at Austin in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy The University of Texas at Austin December 2018 Some Considerations in the Quantization of General Relativity by Thomas Judson McClain, Ph.D. The University of Texas at Austin, 2018 Supervisor: Richard Matzner In this dissertation, I explore a number of topics related to the quantization of the theory of general relativity. The first chapter presents a novel algorithm for determining the sky location of a gravitational wave source. The second chapter develops a new approach to polysymplectic covariant Hamiltonian field theory, then uses that approach to produce an original quantization procedure applicable to both particles and fields. The third and final chapter applies the quantization procedure of the second chapter to the particularly challenging case of general relativity. An appendix on noise in gravitational wave detectors and a Glossary of terms are in- cluded for the convenience of the reader. iii Contents Introduction 1 1 A Numerical Source Localization Algorithm for Two Detector Grav- itational Wave Observatory Networks 6 1.1 Overview . .6 1.2 Background . .7 1.3 Methods . .9 1.4 Circularly polarized gravitational waves . 13 1.5 Elliptically polarized gravitational waves . -
Faces & Places
CERN Courier December 2016 Faces & Places Mineral Insulated Cable We were among the fi rst pioneering companies to manufacture MI cable for improved performance and reliability. Standard insulation materials include MgO, Al2O3, and SiO2 with A WARDS high purity for applications such as nuclear and elevated temperature as standard. Cables are manufactured to all International Standards such as IEC, ATSM, JIS and BS. APS announces 2017 prize recipients • Flexible - bend radius of 6 x outer diameter. • Pressure tight vacuum seal. • Operating temperature of -269℃ to 1,260℃. • Welded and hermetically sealed connections. • Sheath diameter from 0.08mm to 26mm. • Capable of operating in the following atmospheres - oxidising, reducing, neutral and vacuum. • RF Coaxial, Triaxal cables, Multiconductor Transmission Top: Michel Della Negra, Peter Jenni and Tejinder Virdee (Panofsky Prize); James cables for power, control and instrumentation. Bjorken, Sekazi Mtingwa and Anton Piwinski (Wilson Prize). Bottom: Sally Dawson, Howard Haber, John Gunion and Gordon Kane (J J Sakurai Prize). The American Physical Society (APS) has instrumental contributions to the theory of problems in nuclear-structure physics, awarded its prizes for 2017, several of which the properties, reactions and signatures of cold-atom physics, and dense-matter Temperature is our business Cables | Temp Measurement | Electric Heaters are devoted to the fi elds of high-energy and the Higgs boson. theory of relevance to neutron stars”. The nuclear physics. The W K H Panofsky Prize Recognising -
Notices of the American Mathematical Society ABCD Springer.Com
ISSN 0002-9920 Notices of the American Mathematical Society ABCD springer.com Visit Springer at the of the American Mathematical Society 2010 Joint Mathematics December 2009 Volume 56, Number 11 Remembering John Stallings Meeting! page 1410 The Quest for Universal Spaces in Dimension Theory page 1418 A Trio of Institutes page 1426 7 Stop by the Springer booths and browse over 200 print books and over 1,000 ebooks! Our new touch-screen technology lets you browse titles with a single touch. It not only lets you view an entire book online, it also lets you order it as well. It’s as easy as 1-2-3. Volume 56, Number 11, Pages 1401–1520, December 2009 7 Sign up for 6 weeks free trial access to any of our over 100 journals, and enter to win a Kindle! 7 Find out about our new, revolutionary LaTeX product. Curious? Stop by to find out more. 2010 JMM 014494x Adrien-Marie Legendre and Joseph Fourier (see page 1455) Trim: 8.25" x 10.75" 120 pages on 40 lb Velocity • Spine: 1/8" • Print Cover on 9pt Carolina ,!4%8 ,!4%8 ,!4%8 AMERICAN MATHEMATICAL SOCIETY For the Avid Reader 1001 Problems in Mathematics under the Classical Number Theory Microscope Jean-Marie De Koninck, Université Notes on Cognitive Aspects of Laval, Quebec, QC, Canada, and Mathematical Practice Armel Mercier, Université du Québec à Chicoutimi, QC, Canada Alexandre V. Borovik, University of Manchester, United Kingdom 2007; 336 pages; Hardcover; ISBN: 978-0- 2010; approximately 331 pages; Hardcover; ISBN: 8218-4224-9; List US$49; AMS members 978-0-8218-4761-9; List US$59; AMS members US$47; Order US$39; Order code PINT code MBK/71 Bourbaki Making TEXTBOOK A Secret Society of Mathematics Mathematicians Come to Life Maurice Mashaal, Pour la Science, Paris, France A Guide for Teachers and Students 2006; 168 pages; Softcover; ISBN: 978-0- O. -
PEA 22 72 Pages.Indd
#22 JUILLET AOÛT 2016 MAGAZINE DE LA CHAMBRE DE COMMERCE ET D’INDUSTRIE ÉDITION DE RÉGION ALSACE STRASBOURG BAS-RHIN 27 42 EXPOSER DU 20/10 AU 2/11 SUR UN SALON ÉLECTIONS LA PRÉPARATION CONSULAIRES GAGNANTE échelon 1 RECRUTEMENT QUELLES SOLUTIONS POUR UNE PLUS GRANDE échelon 2 SOUPLESSE ? CCI CHALONS-EN-CHAMPAGNE CCI ALSACE VITRY-LE-FRANÇOIS STE-MÉNÉHOULD WWW.POINTECOALSACE.FR CCI STRASBOURG ET BAS-RHIN www.strasbourg.cci.fr 5 échelon 3 CCI STRASBOURG ET BAS-RHIN CCI FRANCE Pôle Formation Pôle développement durable Observatoire Enviroveille des entreprises CCI NÎMES échelon 4 une école un équipement CCI MARSEILLE CCI LYON PROVENCE échelon 5 15 COMMUNIQUÉ > AGIR AU CŒUR DE VOS VIES Insertion, emploi L’efficacité Bas-Rhinoise grâce aux entreprises Le Département verse le Revenu de solidarité active (RSA), et il va plus loin : il permet à un maximum de bénéficiaires des minimas sociaux de retrouver une place dans le monde du travail. Les résultats sont là, en privilégiant le partenariat avec les entreprises et en impliquant les allocataires. Cap maintenant sur un nouvel objectif ambitieux : trouver 10 000 emplois au cours des 3 prochaines années pour des personnes en situation de précarité. CHIFFRES CLÉS « Vous avez des besoins en recrutement, - 2,5 % 7 M€ nous avons des candidats à vous proposer » Frédéric Bierry, président du Conseil Départemental NOMBRE DE D’ÉCONOMIES BÉNÉFICIAIRES En 1 an, les efforts du n parle de renationaliser le RSA. Nous voulons être encore plus proactifs DU RSA Département ont permis de réaliser des économies « Pour moi, c’est une mauvaise idée : pour trouver des emplois : travailler encore Alors que le chômage aug- mente, le Département et sur les dépenses de RSA la décision d’attribuer ou non le RSA plus avec les entreprises et les chambres ses partenaires (Pôle Emploi, Région, Associations) ont serait alors coupée des réalités vécues consulaires, viser davantage le marché du travail réussi à faire diminuer le O sur le terrain.