SEMPARIS : Le serveur des séminaires parisiens

Le serveur de séminaires SEMPARIS accueille toutes les annonces de séminaires de la région parisienne, dans tous les domaines de la physique et des mathématiques. Il vous permet aussi de recevoir par courrier électronique la sélection de votre choix. Enfin, il permet l'archivage des présentations au format PDF ou Powerpoint. [ Plus d'informations ]

	Séminaires à venir	[30 suivants]
[ vue agenda ]

Lundi 20 Octobre 2025, 11:30 à LPTHE, LPTHE library SEM-LPTHE (Séminaire du LPTHE) hep-th

Fanny Eustachon ( CPhT ) Long-range minimal models

Abstract: I will present a class of nonlocal conformal field theories (CFTs) in 2d which are obtained as deformations of the Virasoro minimal models. The construction proceeds by coupling a relevant primary operator $\phi_{r,s}$ of the m-th minimal model to a generalized free field. Flowing to the infrared, we reach a new class of CFTs that we call long-range minimal models (LRMMs). During this talk, I will discuss two specific types of LRMMs in the framework of conformal perturbation theory: the case $r=s=2$ corresponding to a straightforward generalization of an infrared duality between the deformed minimal model and a nonlocal Ginzburg-Landau theory proposed for the long-range Ising model (m = 3) in 2017, as well as the case $(r,s)=(1,2)$ endowed with a well-behaved large m-limit obtained from both numerical extrapolations and a method we develop which carries out conformal perturbation theory using Mellin amplitudes and Coulomb gas representations of the correlators. This is based on 2509.26372.

Mardi 21 Octobre 2025, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat

Miha Srdinsek ( CEA Grenoble ) Hybrid between biologically inspired and quantum inspired many-body states

Abstract: Deep neural networks can represent very different sorts of functions, including complex quantum many-body states. Tensor networks can also represent these states, have more structure and are easier to optimize. However, they can be prohibitively costly computationally in two or higher dimensions. In this seminar I will propose a hybrid network [1] which borrows features from the two different formalisms. I will showcase the ansatz by obtaining the representation of a transverse field quantum Ising model with a long range 1/r^6 antiferromagnetic interaction on a 10×10 square lattice. The model corresponds to the Rydberg (cold) atoms platform proposed for quantum annealing. [1] Srdinsek, Waintal, arXiv:2506.05050 (2025)

Mercredi 29 Octobre 2025, 13:30 à IHP, Amphithéâtre Darboux SEED (Seed Seminar of Mathematics and Physics) math-ph

Andrea Sportiello ( CNRS and LIPN, Université Sorbonne Paris Nord ) Grassmann Calculus for the combinatorics of Spanning Trees and Forests

Abstract: TBA

Mercredi 29 Octobre 2025, 15:00 à IHP, Amphithéâtre Darboux SEED (Seed Seminar of Mathematics and Physics) math-ph

Sonia Boulal ( Institut Denis Poisson Université d’Orléans ) Conditioned Marked Galton-Watson trees

Abstract: We consider a Galton–Watson tree in which each node is independently marked, with a probability that depends on its number of offspring. We give a complete picture of the local convergence of critical or subcritical marked Galton–Watson trees, conditioned on having a large number of marks. In certain cases, the limit is a randomly marked tree with an infinite spine, known as the marked Kesten tree. In other cases, the local limit is a randomly marked tree with a node having infinitely many children. This corresponds to the so-called marked condensation phenomenon. Joint work with Romain Abraham and Pierre Debs.

Mercredi 29 Octobre 2025, 16:30 à IHP, Amphithéâtre Darboux SEED (Seed Seminar of Mathematics and Physics) math-ph

Julien Weibel ( INRIA & ENS Paris ) Probability-graphons: limits for sequences of large dense weighted graphs

Abstract: Networks appear naturally in a wide variety of context, including for example: biological networks , epidemics processes, electrical power grids and social networks. Most of those problems involve large dense graphs, that is graphs that have a large number of vertices and a number of edges that scales as the square of the number of vertices. Those graphs are too large to be represented entirely in the targeted applications. The idea is then to go from a combinatorial representation given by the graph to an infinite continuum representation: the graphons studied by Lovász and his co-authors. In this talk, I will present a joint work with Romain Abraham and Jean-François Delmas on probability-graphons, which are measure-valued graphons that generalises graphons to the case of weighted graphs and decorated graphs. I will explain how probability-graphons are used to define random weighted graph models, define a distance that controls convergence for those sampled graphs, and give some topological results on this distance.

Mardi 4 Novembre 2025, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat

Achille Mauri ( EPFL ) TBA

Mercredi 5 Novembre 2025, 13:30 à DPT-PHYS-ENS, ConfIV (E244) - 24 rue Lhomond 75005 PARIS COLLOQUIUM-ENS (Colloquium of the Physics Department of ENS) physics

Dudovich TBA

Abstract: TBA

Jeudi 6 Novembre 2025, 14:00 à ESPCI, tba.
( Zoom link available at seminaires-lpem@espci.fr ) SEM-EXCEP (Seminaire exceptionnel) cond-mat

Chaste Julien ( Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies ) TBA

Abstract: Tba.

Jeudi 6 Novembre 2025, 14:00 à 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

Jérôme Dubail ( CESQ Strasbourg ) TBA

Mercredi 12 Novembre 2025, 10:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Sara Murciano ( LPTMS, Paris ) TBA

Mercredi 12 Novembre 2025, 11:00 à LPENS, L378 FORUM-ENS (Forum de Physique Statistique @ ENS) cond-mat.stat-mech

Maxime Debertolis Natural super-orbitals representation of many-body operators

Abstract: We present the concept of natural super-orbitals for many-body operators, defined as the eigenvectors of the one-body super-density matrix associated with a vectorized operator. We relate these objects to measures of non-Gaussianity of operators associated to the occupations of the natural super-orbitals. We first analyze the general analytical properties of these objects for various typical examples, and then perform a numerical investigation of the natural super-orbitals corresponding to both the time-evolution operator and a time-evolved local operator in the t-V model and in a quantum impurity model. Occupations of the natural orbitals for both operators decay exponentially at all times. This indicates that only a small number of orbitals contribute significantly to quantum correlations, enabling a compact matrix-product-operator representation. This framework opens the door to future research that leverages the compressed structure of operators in their natural super-orbital basis, enabling for instance the computation of out-of-time-order correlators in large interacting systems over extended time scales.

Mercredi 12 Novembre 2025, 11:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Luca Capizzi ( LPTMS, Paris ) TBA

Mercredi 12 Novembre 2025, 12:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Florent Ferro ( LPTMS, Paris ) TBA

Mercredi 12 Novembre 2025, 14:00 à IHES, Amphithéâtre Léon Motchane SEED (Seed Seminar of Mathematics and Physics) math-ph

Vincent Viau ( LAGA, USPN ) TBA

Mercredi 12 Novembre 2025, 15:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Victor Godet ( LPTHE, Paris ) TBA

Mercredi 12 Novembre 2025, 15:15 à IHES, Amphithéâtre Léon Motchane
( Online talk streamed at IHES ) SEED (Seed Seminar of Mathematics and Physics) math-ph

Vladimir Narovlansky ( School of Natural Sciences, Institute for Advanced Study, Princeton, USA ) TBA

Mercredi 12 Novembre 2025, 16:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Stathis Vitouladitis ( ULB, Brussels ) TBA

Jeudi 13 Novembre 2025, 10:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Amartya Harsh Singh ( SISSA, Trieste ) TBA

Jeudi 13 Novembre 2025, 11:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Francesco Benini ( SISSA, Trieste ) TBA

Jeudi 13 Novembre 2025, 12:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Neil Talwar ( SISSA, Trieste ) TBA

Jeudi 13 Novembre 2025, 14:30 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Filiberto Ares ( SISSA, Trieste ) TBA

Jeudi 13 Novembre 2025, 15:30 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Colin Rylands ( University of Coventry ) TBA

Jeudi 13 Novembre 2025, 16:30 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Angelo Russotto ( SISSA, Trieste ) TBA

Vendredi 14 Novembre 2025, 10:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Giuseppe Di Giulio ( University of Stockholm ) TBA

Vendredi 14 Novembre 2025, 11:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Michele Mazzoni ( University of Bologna ) TBA

Vendredi 14 Novembre 2025, 12:00 à LPTHE, LPTHE library
( Entanglement asymmetry workshop: https://indico.global/e/asymmetry ) WORK-CONF (Workshop or Conference) cond-mat.stat-mech|hep-th|quant-ph

Sridip Pal ( IHES, Paris ) TBA

Mardi 18 Novembre 2025, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat

Thibault Scoquart ( LPT Toulouse/LPTMC ) TBA

Mardi 18 Novembre 2025, 11:00 à LPTHE, LPTHE library SEM-LPTHE (Séminaire du LPTHE) hep-th

Salvatore Raucci ( IFT Madrid ) TBA

Mercredi 19 Novembre 2025, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) hep-th

Sean Hartnoll ( DAMTP, Cambridge ) TBA

Abstract: TBA

Jeudi 20 Novembre 2025, 11:00 à IJCLAB, Bld. 210, Theory Seminar Room (114)
( https://indico.ijclab.in2p3.fr/event/12040/ ) IJCLAB-PTH (Particle Theory Seminar of IJCLAB Orsay) hep-ph

Clara Murgui ( CERN ) TBA

Abstract: TBA

les séminaires dans la série
à l' institut dans le domaine
et dont le champ comprend la séquence

[ Affiche Postscript | Affiche PDF | Fil RSS | Format ICal ]

Vous êtes invité à vous abonner aux listes de distribution SEMPARIS afin de recevoir les annonces par courriel.

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

Lundi 20 Octobre 2025, 11:30 à LPTHE, LPTHE library	SEM-LPTHE (Séminaire du LPTHE)	hep-th
Fanny Eustachon ( CPhT )	Long-range minimal models
Abstract:	I will present a class of nonlocal conformal field theories (CFTs) in 2d which are obtained as deformations of the Virasoro minimal models. The construction proceeds by coupling a relevant primary operator $\phi_{r,s}$ of the m-th minimal model to a generalized free field. Flowing to the infrared, we reach a new class of CFTs that we call long-range minimal models (LRMMs). During this talk, I will discuss two specific types of LRMMs in the framework of conformal perturbation theory: the case $r=s=2$ corresponding to a straightforward generalization of an infrared duality between the deformed minimal model and a nonlocal Ginzburg-Landau theory proposed for the long-range Ising model (m = 3) in 2017, as well as the case $(r,s)=(1,2)$ endowed with a well-behaved large m-limit obtained from both numerical extrapolations and a method we develop which carries out conformal perturbation theory using Mellin amplitudes and Coulomb gas representations of the correlators. This is based on 2509.26372.

Mardi 21 Octobre 2025, 10:45 à LPTMC, campus Jussieu, couloir 12-13, 5ème étage, salle 5-23	SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée)	cond-mat
Miha Srdinsek ( CEA Grenoble )	Hybrid between biologically inspired and quantum inspired many-body states
Abstract:	Deep neural networks can represent very different sorts of functions, including complex quantum many-body states. Tensor networks can also represent these states, have more structure and are easier to optimize. However, they can be prohibitively costly computationally in two or higher dimensions. In this seminar I will propose a hybrid network [1] which borrows features from the two different formalisms. I will showcase the ansatz by obtaining the representation of a transverse field quantum Ising model with a long range 1/r^6 antiferromagnetic interaction on a 10×10 square lattice. The model corresponds to the Rydberg (cold) atoms platform proposed for quantum annealing. [1] Srdinsek, Waintal, arXiv:2506.05050 (2025)

Mercredi 29 Octobre 2025, 13:30 à IHP, Amphithéâtre Darboux	SEED (Seed Seminar of Mathematics and Physics)	math-ph
Andrea Sportiello ( CNRS and LIPN, Université Sorbonne Paris Nord )	Grassmann Calculus for the combinatorics of Spanning Trees and Forests
Abstract:	TBA

Mercredi 5 Novembre 2025, 13:30 à DPT-PHYS-ENS, ConfIV (E244) - 24 rue Lhomond 75005 PARIS	COLLOQUIUM-ENS (Colloquium of the Physics Department of ENS)	physics
Dudovich	TBA
Abstract:	TBA

Jeudi 6 Novembre 2025, 14:00 à ESPCI, tba. ( Zoom link available at seminaires-lpem@espci.fr )	SEM-EXCEP (Seminaire exceptionnel)	cond-mat
Chaste Julien ( Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies )	TBA
Abstract:	Tba.

Mercredi 12 Novembre 2025, 10:00 à LPTHE, LPTHE library ( Entanglement asymmetry workshop: https://indico.global/e/asymmetry )	WORK-CONF (Workshop or Conference)	cond-mat.stat-mech\|hep-th\|quant-ph
Sara Murciano ( LPTMS, Paris )	TBA

Mercredi 12 Novembre 2025, 11:00 à LPENS, L378	FORUM-ENS (Forum de Physique Statistique @ ENS)	cond-mat.stat-mech
Maxime Debertolis	Natural super-orbitals representation of many-body operators
Abstract:	We present the concept of natural super-orbitals for many-body operators, defined as the eigenvectors of the one-body super-density matrix associated with a vectorized operator. We relate these objects to measures of non-Gaussianity of operators associated to the occupations of the natural super-orbitals. We first analyze the general analytical properties of these objects for various typical examples, and then perform a numerical investigation of the natural super-orbitals corresponding to both the time-evolution operator and a time-evolved local operator in the t-V model and in a quantum impurity model. Occupations of the natural orbitals for both operators decay exponentially at all times. This indicates that only a small number of orbitals contribute significantly to quantum correlations, enabling a compact matrix-product-operator representation. This framework opens the door to future research that leverages the compressed structure of operators in their natural super-orbital basis, enabling for instance the computation of out-of-time-order correlators in large interacting systems over extended time scales.

Mercredi 19 Novembre 2025, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774	IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires)	hep-th
Sean Hartnoll ( DAMTP, Cambridge )	TBA
Abstract:	TBA

Jeudi 20 Novembre 2025, 11:00 à IJCLAB, Bld. 210, Theory Seminar Room (114) ( https://indico.ijclab.in2p3.fr/event/12040/ )	IJCLAB-PTH (Particle Theory Seminar of IJCLAB Orsay)	hep-ph
Clara Murgui ( CERN )	TBA
Abstract:	TBA