Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

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 ]

Monday 17 March 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Christophe Garban ( Université Lyon I ) The Berezinskii-Kosterlitz-Thouless (BKT) Phase and its Domain of Attraction (3/4)
Abstract: One of the main goals of statistical physics is to study how spins displayed along the lattice Z^d interact together and fluctuate as the temperature changes. When the spins belong to a discrete set (which is the case for example in the celebrated Ising model, where spins σ_x take values in {-1,+1}) the nature of the phase transitions which arise as one varies the temperature is now rather well understood. When the spins belong instead to a continuous space (for example the unit circle S^1 for the so-called XY model, the unit sphere S^2 for the classical Heisenberg model etc.), the nature of the phase transitions differs drastically from the discrete symmetry setting. The case where the (continuous) symmetry is non-Abelian is even more mysterious (especially when d = 2) than the Abelian case. In the latter case, Berezinskii, Kosterlitz and Thouless have predicted in the 70's that these spins systems undergo a new type of phase transition in d = 2 -- now called the BKT phase transition -- which is caused by a change of behaviour of certain monodromies called "vortices". In this course, I will give an introduction to this intriguing BKT phase transition. Lecture 1. Introduction to the Berezinskii-Kosterlitz-Thouless (BKT) phase transition. Main examples which undergo a BKT phase transition (XY and Villain models on Z^2, Coulomb gas, clock models, integer-valued height functions). Physics explanations of the BKT transition and difference between S^1 and S^2. Lecture 2. Mathematical approach to BKT. Lecture 3. Domain of attraction of the BKT phase. Lecture 4. Non-linear sigma models and curvature.

Tuesday 18 March 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Christophe Garban ( Université Lyon I ) The Berezinskii-Kosterlitz-Thouless (BKT) Phase and its Domain of Attraction (4/4)
Abstract: One of the main goals of statistical physics is to study how spins displayed along the lattice Z^d interact together and fluctuate as the temperature changes. When the spins belong to a discrete set (which is the case for example in the celebrated Ising model, where spins σ_x take values in {-1,+1}) the nature of the phase transitions which arise as one varies the temperature is now rather well understood. When the spins belong instead to a continuous space (for example the unit circle S^1 for the so-called XY model, the unit sphere S^2 for the classical Heisenberg model etc.), the nature of the phase transitions differs drastically from the discrete symmetry setting. The case where the (continuous) symmetry is non-Abelian is even more mysterious (especially when d = 2) than the Abelian case. In the latter case, Berezinskii, Kosterlitz and Thouless have predicted in the 70's that these spins systems undergo a new type of phase transition in d = 2 -- now called the BKT phase transition -- which is caused by a change of behaviour of certain monodromies called "vortices". In this course, I will give an introduction to this intriguing BKT phase transition. Lecture 1. Introduction to the Berezinskii-Kosterlitz-Thouless (BKT) phase transition. Main examples which undergo a BKT phase transition (XY and Villain models on Z^2, Coulomb gas, clock models, integer-valued height functions). Physics explanations of the BKT transition and difference between S^1 and S^2. Lecture 2. Mathematical approach to BKT. Lecture 3. Domain of attraction of the BKT phase. Lecture 4. Non-linear sigma models and curvature.

Wednesday 19 March 2025, 12:45 at LPENS, 3 rue dUlm (College de France) FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Dalimil Mazac ( IPHT ) TBA

Tuesday 25 March 2025, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-GEN (Séminaire général du SPhT)
Per Berglund ( University of New Hampshire ) TBA

Wednesday 26 March 2025, 12:45 at LPENS, 3 rue dUlm College de France FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Félix Werner ( LKB ) TBA

Thursday 27 March 2025, 10:30 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Misha Gromov ( IHES ) Mathematical Description of Biological Structures (1/4)
Abstract: We shall try to assign mathematical meaning to the language used by biologists for describing basic structures and processes in living organisms, from the (sub)cellular level up to evolutionary dynamics of populations. In particular, we shall elucidate the mathematical as well as biological meaning of the following concepts. - biological (non-Shannon) information, - descriptional (non-Kolmogorov) complexity, - biological structure, - biological function (performed by a particular structure), - biological purpose (of a function), - information/program encoded and stored by a material structure (DNA, RNA), - information/signal transmitted by a matter/energy process/flow, - information/program, which controls such a "flow", - biological structures build by (networks of) matter/energy flows, e.g transcription --> translation --> protein folding. Also we indicate a potential use of formalisation of biological language in genetic engineering, e.g. in the analysis/applications of CRISPR and of phage assisted continuous evolution.

Thursday 27 March 2025, 14:00 at LPTMC, Jussieu, LPTMC seminar room, towers 13-12, 5th floor, room 523 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat
Tarik Yefsah ( LKB ) TBA
Abstract: TBA

Thursday 27 March 2025, 17:00 at UFR-PHYS-SU, Amphi 25 Campus Pierre-et-Marie-Curie, Jussieu CPMC (Colloquium Pierre et Marie Curie) astro-ph|cond-mat|gr-qc|hep-ex|hep-lat|hep-ph|hep-th|physics|quant-ph
Lydéric Bocquet ( LPENS, Académie des Sciences ) La mécanique moléculaire des fluides
Abstract: TBA

Monday 31 March 2025, 14:15 at IPHT, Salle Claude Itzykson, Bât. 774 COURS (Cours) hep-th
Carlo Heissenberg ( IPhT (Institut de Physique Théorique du CEA de Saclay) ) Gravitational waves, scattering amplitudes and BMS
Abstract: Speaker : Carlo Heissenberg (IPhT) Abstract: TBA Livestream on youtube.com/IPhT-TV: no subscription required Videoconference: subscribe to the course newsletter to receive links WARNING: Change of schedule (#1)!!!

Wednesday 2 April 2025, 13:30 at DPT-PHYS-ENS, salle ConfIV (Département de Physique de l'ENS - 24 rue Lhomond 75005 PARIS) COLLOQUIUM-ENS (Colloquium of the Physics Department of ENS) physics
Susana Huelga TBA
Abstract: TBA

Thursday 3 April 2025, 10:30 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Misha Gromov ( IHES ) Mathematical Description of Biological Structures (2/4)
Abstract: We shall try to assign mathematical meaning to the language used by biologists for describing basic structures and processes in living organisms, from the (sub)cellular level up to evolutionary dynamics of populations. In particular, we shall elucidate the mathematical as well as biological meaning of the following concepts. - biological (non-Shannon) information, - descriptional (non-Kolmogorov) complexity, - biological structure, - biological function (performed by a particular structure), - biological purpose (of a function), - information/program encoded and stored by a material structure (DNA, RNA), - information/signal transmitted by a matter/energy process/flow, - information/program, which controls such a "flow", - biological structures build by (networks of) matter/energy flows, e.g transcription --> translation --> protein folding. Also we indicate a potential use of formalisation of biological language in genetic engineering, e.g. in the analysis/applications of CRISPR and of phage assisted continuous evolution.

Thursday 3 April 2025, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) hep-th
Stavros Garoufalidis ( Shenzen University ) TBA

Friday 4 April 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Daniel Tataru ( UC Berkeley ) Global Solutions for Nonlinear Dispersive Waves (1/4)
Abstract: The key property of linear dispersive flows is that waves with different frequencies travel with different group velocities, which leads to the phenomena of dispersive decay. Nonlinear dispersive flows also allow for interactions of linear waves, and their long time behavior is determined by the balance of linear dispersion on one hand, and nonlinear effects on the other hand. The first goal of these lectures will be to present and motivate a new set of conjectures which aim to describe the global well-posedness and the dispersive properties of solutions in the most difficult case when the nonlinear effects are dominant, assuming only small initial data. This covers many interesting physical models, yet, as recently as a few years ago, there was no clue even as to what one might reasonably expect. The second objective of the lectures will be to describe some very recent results in this direction, in joint work with my collaborator Mihaela Ifrim from University of Wisconsin, Madison.

Monday 7 April 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Daniel Tataru ( UC Berkeley ) Global Solutions for Nonlinear Dispersive Waves (2/4)
Abstract: The key property of linear dispersive flows is that waves with different frequencies travel with different group velocities, which leads to the phenomena of dispersive decay. Nonlinear dispersive flows also allow for interactions of linear waves, and their long time behavior is determined by the balance of linear dispersion on one hand, and nonlinear effects on the other hand. The first goal of these lectures will be to present and motivate a new set of conjectures which aim to describe the global well-posedness and the dispersive properties of solutions in the most difficult case when the nonlinear effects are dominant, assuming only small initial data. This covers many interesting physical models, yet, as recently as a few years ago, there was no clue even as to what one might reasonably expect. The second objective of the lectures will be to describe some very recent results in this direction, in joint work with my collaborator Mihaela Ifrim from University of Wisconsin, Madison.

Monday 7 April 2025, 14:00 at LPENS, TBD LPENS-MDQ (Séminaire Matériaux et Dispositifs Quantiques du LPENS) cond-mat
Akashdeep Kamra ( RPTU Kaiserlautern ) TBA

Tuesday 8 April 2025, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-GEN (Séminaire général du SPhT)
Paolo Di Vecchia ( Niels Bohr Institute and Nordita ) TBA

Wednesday 9 April 2025, 14:00 at LPENS, 3 rue dUlm (College de France) FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Marylou Gabrie ( LPENS ) TBA

Wednesday 9 April 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Daniel Tataru ( UC Berkeley ) Global Solutions for Nonlinear Dispersive Waves (3/4)
Abstract: The key property of linear dispersive flows is that waves with different frequencies travel with different group velocities, which leads to the phenomena of dispersive decay. Nonlinear dispersive flows also allow for interactions of linear waves, and their long time behavior is determined by the balance of linear dispersion on one hand, and nonlinear effects on the other hand. The first goal of these lectures will be to present and motivate a new set of conjectures which aim to describe the global well-posedness and the dispersive properties of solutions in the most difficult case when the nonlinear effects are dominant, assuming only small initial data. This covers many interesting physical models, yet, as recently as a few years ago, there was no clue even as to what one might reasonably expect. The second objective of the lectures will be to describe some very recent results in this direction, in joint work with my collaborator Mihaela Ifrim from University of Wisconsin, Madison.

Thursday 10 April 2025, 10:30 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Misha Gromov ( IHES ) Mathematical Description of Biological Structures (3/4)
Abstract: We shall try to assign mathematical meaning to the language used by biologists for describing basic structures and processes in living organisms, from the (sub)cellular level up to evolutionary dynamics of populations. In particular, we shall elucidate the mathematical as well as biological meaning of the following concepts. - biological (non-Shannon) information, - descriptional (non-Kolmogorov) complexity, - biological structure, - biological function (performed by a particular structure), - biological purpose (of a function), - information/program encoded and stored by a material structure (DNA, RNA), - information/signal transmitted by a matter/energy process/flow, - information/program, which controls such a "flow", - biological structures build by (networks of) matter/energy flows, e.g transcription --> translation --> protein folding. Also we indicate a potential use of formalisation of biological language in genetic engineering, e.g. in the analysis/applications of CRISPR and of phage assisted continuous evolution.

Friday 11 April 2025, 14:00 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Daniel Tataru ( UC Berkeley ) Global Solutions for Nonlinear Dispersive Waves (4/4)
Abstract: The key property of linear dispersive flows is that waves with different frequencies travel with different group velocities, which leads to the phenomena of dispersive decay. Nonlinear dispersive flows also allow for interactions of linear waves, and their long time behavior is determined by the balance of linear dispersion on one hand, and nonlinear effects on the other hand. The first goal of these lectures will be to present and motivate a new set of conjectures which aim to describe the global well-posedness and the dispersive properties of solutions in the most difficult case when the nonlinear effects are dominant, assuming only small initial data. This covers many interesting physical models, yet, as recently as a few years ago, there was no clue even as to what one might reasonably expect. The second objective of the lectures will be to describe some very recent results in this direction, in joint work with my collaborator Mihaela Ifrim from University of Wisconsin, Madison.

Thursday 17 April 2025, 10:30 at IHES, Amphithéâtre Léon Motchane
( Cours de l'IHES )
MATH-IHES (TBA) math
Misha Gromov ( IHES ) Mathematical Description of Biological Structures (4/4)
Abstract: We shall try to assign mathematical meaning to the language used by biologists for describing basic structures and processes in living organisms, from the (sub)cellular level up to evolutionary dynamics of populations. In particular, we shall elucidate the mathematical as well as biological meaning of the following concepts. - biological (non-Shannon) information, - descriptional (non-Kolmogorov) complexity, - biological structure, - biological function (performed by a particular structure), - biological purpose (of a function), - information/program encoded and stored by a material structure (DNA, RNA), - information/signal transmitted by a matter/energy process/flow, - information/program, which controls such a "flow", - biological structures build by (networks of) matter/energy flows, e.g transcription --> translation --> protein folding. Also we indicate a potential use of formalisation of biological language in genetic engineering, e.g. in the analysis/applications of CRISPR and of phage assisted continuous evolution.

Wednesday 7 May 2025, 12:45 at LPENS, 3 rue dUlm (College de France) FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Kirone Mallick ( IPHT ) TBA

Tuesday 13 May 2025, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-GEN (Séminaire général du SPhT)
Bogdan Andrei Bernevig ( Princeton U. ) TBA
Abstract: TBA

Thursday 15 May 2025, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) hep-th|math.AG
Adrien Sauvaget ( Cergy ) TBA

Thursday 22 May 2025, 17:00 at UFR-PHYS-SU, Amphi 25 Campus Pierre-et-Marie-Curie, Jussieu CPMC (Colloquium Pierre et Marie Curie) astro-ph|cond-mat|gr-qc|hep-ex|hep-lat|hep-ph|hep-th|physics|quant-ph
Didier Queloz ( Cambridge U & ETH Zurich ) The exoplanet revolution
Abstract: TBA

Wednesday 28 May 2025, 13:30 at DPT-PHYS-ENS, salle ConfIV (Département de Physique de l'ENS - 24 rue Lhomond 75005 PARIS) COLLOQUIUM-ENS (Colloquium of the Physics Department of ENS) physics
Buonanno TBA
Abstract: TBA

Tuesday 10 June 2025, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-GEN (Séminaire général du SPhT)
Leticia Cugliandolo ( LPTHE ) TBA
Abstract: TBA

Thursday 12 June 2025, 11:00 at LPTHE, bibliothèque du LPTHE, tour 13-14, 4eme étage SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) hep-th
Jeremy Lovejoy TBA

Wednesday 18 June 2025, 12:45 at LPENS, 3 rue dUlm (College de France) FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech
Nicolas Pavloff ( LPTMS ) TBA

Thursday 19 June 2025, 14:00 at LPTMC, Jussieu, LPTMC seminar room, towers 13-12, 5th floor, room 523 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat
Adam Nahum ( LPENS ) TBA on Z2 gauge theory

seminars from series at institute
in subject with field matching

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

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

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