The SEMPARIS seminar webserver hosts annoucements of all seminars taking place in Paris area, in all topics of physics, mathematics and computer science. It allows registered users to receive a selection of announcements by email on a daily or weekly basis, and offers the possibility to archive PDF or Powerpoint files, making it available to the scientific community.   [ More information ]

 [Previous 30 ] Upcoming Seminars [Next 30 ] [ scheduler view ]

 Wednesday 17 May 2017, 11:00 at LPTHE, Bibliothèque SEM-INFOR (Séminaire informel) hep-th|math|math-ph|math.AG|math.CO|math.KT|math.MP|math.QA Paul Zinn-Justin ( University of Melbourne ) Schubert calculus and quantum integrability (2/3) Abstract: Schubert calculus is a branch of enumerative geometry, which deals with configurations of linear subspaces of a vector space. Translated into the modern language, it amounts to certain calculations in the cohomology ring of Grassmannians and flag varieties. A practical problem is to give a combinatorial rule for the structure constants of that ring. A few years ago, I observed that there was a hidden quantum integrability in the case of Grassmannians (for which the combinatorial rule is the so-called Littlewood--Richardson rule). In a somewhat unrelated development, there has been a growing body of work (including my own) showing the deep connection between cohomology theories (ordinary cohomology, K-theory, elliptic cohomology) and quantum integrable systems. In particular Maulik and Okounkov introduced a nice framework for this connection. It is natural to try to reinterpret my observation above in this language. After introducing these various concepts, I shall present recent work with A. Knutson in this direction. In particular, this provides completely new rules for the calculation of structure constants of the equivariant cohomology or K-theory of d-step flag varieties for d smaller or equal to 4, thus moving several "steps" closer to the completion of the program of Schubert calculus.

 Wednesday 17 May 2017, 14:15 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) hep-th Harold Erbin ( LPTHE ) (TBA)

 Thursday 18 May 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) cond-mat Jean-Noël Fuchs ( Laboratoire de Physique Théorique de la Matière Condensée, UPMC ) TBA

 Friday 19 May 2017, 11:30 at SAMM, C20.13, Centre Pierre Mendès-France, Univ. Paris-1, 90 rue de Tolbiac, Paris SAMM (Statistics, Analysis, Multidisciplinary Modeling) cond-mat.stat-mech|math.PR|math.ST Céline Duval ( MAP5 - Univ. Paris Descartes ) Compound Poisson approximation to estimate the Lévy density Abstract: We construct an estimator of the Lévy density, with respect to the Lebesgue measure, of a pure jump Lévy process from high frequency observations. The main novelty of our result is that we directly estimate the Lévy density in cases where the process may present infinite activity. Moreover, we study the risk of the estimator with respect to $L_p$ loss functions, $1\leq p < \infty$ The main idea behind the estimation procedure that we propose is to use that "every infinitely divisible distribution is the limit of a sequence of compound Poisson distributions" and to take advantage of the fact that it is well known how to estimate the Lévy density of a compound Poisson process in the high frequency setting. We consider linear wavelet estimators and the performance of our procedure is studied in term of L_p loss functions. The results are illustrated with several examples.

 Tuesday 23 May 2017, 14:00 at LPTHE, LPTHE Library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th Harold Erbin ( LPTENS ) Recent developments in superstring field theory Abstract: I will review some recent developments of type II and heterotic superstring field theory. The approach I will follow is due to Ashoke Sen and based on the construction of the open-closed bosonic string field theory by Zwiebach. Particular attention will be devoted to the three main challenges faced by superstring field theory: inclusion of the Ramond sector, removal of spurious singularities due to the superconformal ghosts and definition of a prescription for the off-shell amplitudes. The plan is the following: 1) motivations, divergences in (super)string theory and off-shell amplitudes; 2) superstring field theory: gauge fixed and quantum action, construction of the Ramond sector 3) momentum representation of amplitudes, applications: unitarity, soft theorems

 Tuesday 23 May 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th Gary Gibbons ( Cambridge University ) TBA

 Tuesday 23 May 2017, 16:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-HEP (Séminaire de physique des particules et de cosmologie) hep-ph Jérôme Gleyzes ( JPL and Caltech ) Consistency relations of the large scale structure and how to break them Abstract: Upcoming cosmological experiments intend to exploit the large scale structure of the Universe to get a better understanding of the observed cosmic acceleration. By measuring the power spectrum, one can constrain the equation of state of dark energy, and galaxy surveys promise great improvement over the current constraints. Galaxy surveys can also be used to gather cosmological information beyond cosmic acceleration. For example, one can derive consistency relations that can relate the bispectrum to the power spectrum for example. Those relations are very robust, as they rely on only two assumptions: the equivalence principle and the gaussianity of initial conditions. They are thus expected to hold within the standard cosmological model. On the other hand, their potential violation can be used to put bound on theories that predict deviations from one of those two assumptions, which is what I will explore in this talk.

 Wednesday 24 May 2017, 11:00 at LPTHE, Bibliothèque SEM-INFOR (Séminaire informel) hep-th|math|math-ph|math.AG|math.CO|math.KT|math.MP|math.QA Paul Zinn-Justin ( University of Melbourne ) Schubert calculus and quantum integrability (3/3) Abstract: Schubert calculus is a branch of enumerative geometry, which deals with configurations of linear subspaces of a vector space. Translated into the modern language, it amounts to certain calculations in the cohomology ring of Grassmannians and flag varieties. A practical problem is to give a combinatorial rule for the structure constants of that ring. A few years ago, I observed that there was a hidden quantum integrability in the case of Grassmannians (for which the combinatorial rule is the so-called Littlewood--Richardson rule). In a somewhat unrelated development, there has been a growing body of work (including my own) showing the deep connection between cohomology theories (ordinary cohomology, K-theory, elliptic cohomology) and quantum integrable systems. In particular Maulik and Okounkov introduced a nice framework for this connection. It is natural to try to reinterpret my observation above in this language. After introducing these various concepts, I shall present recent work with A. Knutson in this direction. In particular, this provides completely new rules for the calculation of structure constants of the equivariant cohomology or K-theory of d-step flag varieties for d smaller or equal to 4, thus moving several "steps" closer to the completion of the program of Schubert calculus.

 Thursday 1 June 2017, 10:00 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th David Tong ( Cambridge U. ) TBA

 Thursday 1 June 2017, 11:45 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th Mike Blake ( MIT ) TBA

 Thursday 1 June 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.optics Stefan Rotter ( TU Vienna ) TBA

 Friday 2 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 ) COURS (Cours) cond-mat|quant-ph Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (1/5) Abstract: (TBA) Attachments: 2016-2017.pdf (5422338 bytes)

 Tuesday 6 June 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris ( ¡¡ Please be aware of the unusual date: Tuesday !! ) SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) cond-mat.mtrl-sci Marvin Cohen ( University of California, Berkeley ) TBA

 Tuesday 6 June 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th David Wiltshire ( University of Canterbury, New Zealand ) TBA

 Tuesday 6 June 2017, 14:00 at LPTHE, Library LPTHE-PPH (Particle Physics at LPTHE) hep-ph Diego Redigolo ( Weizmann and Tel-Aviv University ) TBA

 Friday 9 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 ) COURS (Cours) cond-mat|quant-ph Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (2/5) Abstract: (TBA) Attachments: 2016-2017.pdf (5422338 bytes)

 Tuesday 13 June 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th Kalioppi Petraki ( LPTHE, UPMC ) TBA

 Thursday 15 June 2017, 10:00 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th Carlos Hoyos ( University of Oviedo ) TBA

 Thursday 15 June 2017, 11:45 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th Thomas Hertog ( University of Leuven ) TBA

 Thursday 15 June 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.med-ph Alain Fischer ( Collège de France ) TBA

 Friday 16 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 ) COURS (Cours) cond-mat|quant-ph Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (3/5) Abstract: (TBA) Attachments: 2016-2017.pdf (5422338 bytes)

 Tuesday 20 June 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th Manibrata Sen ( Tata Institute of Fundamental Research, Mumbai ) TBA

 Thursday 22 June 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.optics Maxime Jacquot ( Institut FEMTO-ST, Université de Franche-Comté ) TBA

 Friday 23 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 ) COURS (Cours) cond-mat|quant-ph Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (4/5) Abstract: (TBA) Attachments: 2016-2017.pdf (5422338 bytes)

 Tuesday 27 June 2017, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-SEM (Séminaire du IPHT) physics Giulio Biroli (TBA)

 Tuesday 27 June 2017, 14:00 at IPHT, Salle Claude Itzykson, Bât. 774 SOUTEN-TH (Soutenance de thèse) physics Michele Mancarella ( IPhT ) (TBA)

 Thursday 29 June 2017, 13:30 at DPT-PHYS-ENS, room Conf. IV, 24 Rue Lhomond, ENS Paris SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) hep-th Dam Thanh Son ( University of Chicago ) TBA

 Friday 30 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 ) COURS (Cours) cond-mat|quant-ph Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (5/5) Abstract: (TBA) Attachments: 2016-2017.pdf (5422338 bytes)

 Friday 7 July 2017, 13:30 at IPHT, Salle Claude Itzykson, Bât. 774 SOUTEN-TH (Soutenance de thèse) physics Soumya Sasmal ( IPhT ) (TBA)

 Thursday 21 September 2017, 13:30 at IPHT, Amphi Claude Bloch, Bât. 774 SOUTEN-TH (Soutenance de thèse) physics Lais Sarem-Schunk ( IPhT ) (TBA)

 seminars All Next Week This Week Today Tomorrow Upcoming Within a Week from series All ACFTA APC APC-COLLOQUIUM APC-TH BH-TOP BI-COSMO-IHP BI-SEM-IHP BIOPHYS-ENS BISEMINAIRE-MP CONDMAT-ENS CONDMAT-THEO COSMO-P6 COURS COURS-FED COURS-IPHT CPHT - PHDSEM CPHT PHYS MATH CPHT- BS CPHT-JOUR CPHT-LLR CPMC DISQUANT ESPCI-COLLOQUE ESPCI/PCT FOUNDPHYS GDT-MODSTO GQ GR-COSMO IDRIS-SEM IHP-ALG IHPSTRMATH IMJ-AA IMJ-AUT IMJ-CHE IMJ-EAA IMJ-REP IMP-MATH-PHYS INST-ETE IPHT-DAP IPHT-GEN IPHT-HEP IPHT-MAT IPHT-PHM IPHT-SEM IPHT-STA IPN-THEO IPN-X IPNO-DR JOUR-CLUB LP(N/T)HE LPA LPNHE LPS-MAGN LPS-MAT-MOL LPS-VULG LPS/ENS LPT-GEN LPT-LPTMS LPT-MAG LPT-PHYSMATH LPT-PTH LPTENS-HE LPTHE-DOC LPTHE-PPH LPTMS LPT_STAT MAG-SUPRA MAT-COND-GEN MATH-IHES MECA-STAT MSC PART-PHYS PHEN-PART PHYS-ESPCI PLATEAU PMMH PT-IHES RENC-THEO RENORMALISATION S-LPTENS SAMM SCOPI SEM-BESSON SEM-CPHT SEM-CSNSM SEM-DARBOUX SEM-EXCEP SEM-FED SEM-GRECO SEM-IBPC SEM-ILP SEM-INFOR SEM-INSP SEM-LAL SEM-LKB SEM-LLR SEM-LPT SEM-LPTENS SEM-LPTHE SEM-LPTM-UCP SEM-LPTMC SEM-LPTMS SEM-LUTH SEM-PHYS-ENS SEM-PMMH SEM-POINCA SEM-UPR5 SOUTEN-HDR SOUTEN-TH SPEC-LARSIM SPEC-SEM STR-LPT-ENS-HE STR-LPTHE STRINT TH-JEUX TH-MAT-COND TRANSPORT TRI-SEMINAIRE WG-EXPTH-LPN/THE WORK-CONF at institute All APC CDF CITEU CPHT CSNSM CURIE DPT-PHYS-ENS ENPC ESPCI ESPCI/UPR5 GRETIA IAP IBPC IDRIS IHES IHP IM-JUSSIEU-PRG IMPMC INSP IPHT IPN LAL LARSIM LKB LLR LMPT LPA LPMA LPNHE LPNHE-GR-TH LPP LPS-ORSAY LPS/ENS LPT LPTENS LPTHE LPTM LPTMC LPTMS LUTH MSC OBSPARIS PCT/ESPCI PMMH SAMM SPEC UPMC in subject All CoRR -- Computing Research Repository CoRR.AI -- Artificial Intelligence CoRR.AR -- Architecture CoRR.CC -- Computational Complexity CoRR.CE -- Computational Engineering CoRR.CG -- Computational Geometry CoRR.CL -- Computation and Language CoRR.CR -- Cryptography and Security CoRR.CV -- Computer Vision and Pattern Recognition CoRR.CY -- Computers and Society CoRR.DB -- Databases CoRR.DC -- Distributed, Parallel, and Cluster Computing CoRR.DL -- Digital Libraries CoRR.DM -- Discrete Mathematics CoRR.DS -- Data Structures and Algorithms CoRR.GL -- General Literature CoRR.GR -- Graphics CoRR.GT -- Computer Science and Game Theory CoRR.HC -- Human-Computer Interaction CoRR.IR -- Information Retrieva CoRR.IT -- Information Theory CoRR.LG -- Learning CoRR.LO -- Logic in Computer Science CoRR.MA -- Multiagent Systems CoRR.MM -- Multimedia; CoRR.MS -- Mathematical Software CoRR.NA -- Numerical Analysis CoRR.NE -- Neural and Evolutionary Computing CoRR.NI -- Networking and Internet Architecture CoRR.OH -- Other CoRR.OS -- Operating Systems CoRR.PF -- Performance CoRR.PL -- Programming Languages CoRR.RO -- Robotics CoRR.SC -- Symbolic Computation CoRR.SD -- Sound CoRR.SE -- Software Engineering astro-ph -- Astrophysics cond-mat -- Condensed Matter cond-mat.dis-nn -- Disordered Sys. and Neural Networks cond-mat.mes-hall -- Mesoscopic Sys. and Q.Hall Effect cond-mat.mtrl-sci -- Materials Science cond-mat.other -- Other cond-mat.soft -- Soft Condensed Matter cond-mat.stat-mech -- Statistical Mechanics cond-mat.str-el -- Strongly Correlated Electrons cond-mat.supr-con -- Superconductivity gr-qc -- General Relativity and Quantum Cosmology hep-ex -- High Energy Physics - Experiment hep-lat -- High Energy Physics - Lattice hep-ph -- High Energy Physics - Phenomenology hep-th -- High Energy Physics - Theory math -- Mathematics math-ph -- Mathematical Physics math.AC -- Commutative Algebra math.AG -- Algebraic Geometry math.AP -- Analysis of PDEs math.AT -- Algebraic Topology math.CA -- Classical Analysis and ODEs math.CO -- Combinatorics math.CT -- Category Theory math.CV -- Complex Variables math.DG -- Differential Geometry math.DS -- Dynamical Systems math.FA -- Functional Analysis math.GM -- General Mathematics math.GN -- General Topology math.GR -- Group Theory math.GT -- Geometric Topology math.HO -- History and Overview math.KT -- K-Theory and Homology math.LO -- Logic math.MG -- Metric Geometry math.MP -- Mathematical Physics math.NA -- Numerical Analysis math.NT -- Number Theory math.OA -- Operator Algebras math.OC -- Optimization and Control math.PR -- Probability math.QA -- Quantum Algebra math.RA -- Rings and Algebras math.RT -- Representation Theory math.SG -- Symplectic Geometry math.SP -- Spectral Theory math.ST -- Statistics nlin -- Nonlinear Sciences nlin.AO -- Adaptation and Self-Organizing Systems nlin.CD -- Cellular Automata and Lattice Gases nlin.CG -- Chaotic Dynamics nlin.PS -- Exactly Solvable and Integrable Systems nlin.SI -- Pattern Formation and Solitons nucl-ex -- Nuclear Experiment nucl-th -- Nuclear Theory physics -- Physics physics.acc-ph -- Accelerator Physics physics.ao-ph -- Atmospheric and Oceanic Physics physics.atm-clus -- Atomic and Molecular Clusters physics.atom-ph -- Atomic Physics physics.bio-ph -- Biological Physics physics.chem-ph -- Chemical Physics physics.class-ph -- Classical Physics physics.comp-ph -- Computational Physics physics.data-an -- Data Analysis physics.ed-ph -- Physics Education physics.flu-dyn -- Fluid Dynamics physics.gen-ph -- General Physics physics.geo-ph -- Geophysics physics.hist-ph -- History of Physics physics.ins-det -- Instrumentation and Detectors physics.med-ph -- Medical Physics physics.optics -- Optics physics.plasm-ph -- Plasma Physics physics.pop-ph -- Popular Physics physics.soc-ph -- Physics and Society physics.space-ph -- Space Physics q-bio -- Quantitative Biology qbio.BM -- Biomolecules qbio.CB -- Cell Behavior qbio.GN -- Genomics qbio.MN -- Molecular Networks qbio.NC -- Neurons and Cognition qbio.OT -- Other qbio.PE -- Populations and Evolution qbio.QM -- Quantitative Methods qbio.SC -- Subcellular Processes; Tissues and Organs qbio.TO -- Tissues and Organs quant-ph -- Quantum Physics with field Speaker Title Abstract Subject matching

[ Postscript Poster | PDF Poster | RSS Thread | ICal Format ]

You are invited to subscribe to SEMPARIS mailing lists in order to receive selected announcements by email.

 [ Annonces ]    [ Abonnements ]    [ Archive ]    [ Aide ]    [ JavaScript requis ] [ English version ]