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 Séminaires à venir [30 suivants] [ vue agenda ]

 Mercredi 23 Mai 2018, 09:00 à LPTM, Maison internationale de la recherche, Neuville-sur-Oise. ( The aim of this conference is to contribute to the construction of new approaches to the study of complex problems in each of the involved disciplines. ) WORK-CONF (Workshop or Conference) cond-mat.dis-nn J. P . Nadal, Y. Moreno, H. Peyton Young, ... Transversal problems in complexity Abstract: Sessions: Complex Dynamics I/II: Evolutionary Game Theory, Population Dynamics applied to economic and biological systems. Complexity in social systems; Physical and Mathematical models of complex systems See: https://web.u-cergy.fr/complexity2018/

 Mercredi 23 Mai 2018, 11:30 à IPN, Bâtiment 100, Salle A015 (  ) IPN-THEO (Séminaire du groupe de physique théorique de l'IPN Orsay) nucl-th F. Werner ( Laboratoire Kastler Brossel ) Can one sum up all Feynman diagrams for the unitary Fermi gas? Abstract: The unitary Fermi gas is a textbook model of strongly correlated fermions that accurately describes ultracold-atom experiments and is also relevant to neutron matter [1]. I will present our long-term project on reliable and accurate computation of equilibrium properties of the unitary Fermi gas by systematic summation of Feynman diagrams. Thanks to a diagrammatic Monte Carlo algorithm, we accurately sample all skeleton diagrams (built on dressed single-particle and pair propagators) up to order $\sim9$. The diagrammatic series is divergent and there is no small parameter so that a resummation method is needed. Previously we used Abelian resummation methods, which are applicable under the assumption that the diagrammatic series has a non-zero radius of convergence; this led to good agreement with experimental data for the equation of state [2] and Tan's contact [3]. In our more recent work [4], we compute analytically the large-order asymptotics of the diagrammatic series, and find that even though the radius of convergence is actually zero, the series is resummable by a generalised conformal-Borel transformation. Our new data for the equation of state and the contact are consistent with the old ones, but the resummation procedure is now mathematically justified and the error bars are significantly smaller. I will also discuss the computational complexity of diagrammatic Monte Carlo algorithms [5], including the new algorithm of [6]. 1] G. C. Strinati, P. Pieri, G. Roepke, P. Schuck, and M. Urban, Physics Reports 1, 738 (2018) [2] K. Van Houcke, F. Werner, E. Kozik, N. Prokof'ev, B. Svistunov, M. Ku, A. Sommer, L. Cheuk, A. Schirotzek, M. Zwierlein, Nature Phys. 8, 366 (2012) [3] K. Van Houcke, F. Werner, E. Kozik, N. Prokof'ev, B. Svistunov, arXiv:1303.6245 [4] R. Rossi, T. Ohgoe, K. Van Houcke, F. Werner, arXiv:1802.07717 [5] R. Rossi, N. Prokof'ev, B. Svistunov, K. Van Houcke, F. Werner, EPL 118, 10004 (2017) [6] R. Rossi, Phys. Rev. Lett. 119, 045701 (2017) Fichiers attachés: 2018_05_23_F_Werner.pdf (219931 bytes)

 Jeudi 24 Mai 2018, 11:00 à LPTHE, bibliothèque SEM-DARBOUX (Séminaire Darboux - physique théorique et mathématiques) math|math.MP Frédéric Chapoton ( Strasbourg ) On cluster varieties associated with trees Abstract: We will first recall the general framework of cluster algebras and cluster varieties attached to arbitrary quivers. We will then explain what can be said about interesting differential forms on these varieties when the quiver is a tree, and how counting points over finite fields gives a first idea about their cohomology. This will be illustrated with examples, and involve an amusing set of Feynman rules with 3 colors.

 Jeudi 24 Mai 2018, 14:00 à LPTHE, Library LPTHE-PPH (Particle Physics at LPTHE) hep-ph Ben Allanach ( Cambridge U. ) Direct Search for $b-$anomaly New Physics at FCC Abstract: There are some discrepancies with respect to Standard Model predictions in measurements of $b-$meson decays. After reviewing the discrepancies and effective field theory fits, we examine simplified models of new physics that may explain a subset of them: in particular, $B \rightarrow K^{(\ast)} \mu^+ \mu^-$. There are two such classes of model that explain the discrepancies at tree-level: leptoquarks or $Z^\prime$ models. We then examine the prospects of detecting these two explanations at future colliders: the future circular collider and the high luminosity or high energy versions of the LHC.

 Jeudi 24 Mai 2018, 14:00 à LPTM, 4.13 St Martin II SEM-LPTM-UCP (Seminaires du LPTM , Universite de Cergy Pontoise) cond-mat Guillaume Roux ( LPTMS Université Paris Sud ) Artificial spin models: examples from topological bosons and Rydberg atoms Abstract: The goal of this seminar is to present how spin models are relevant in the physics of quantum simulators through two examples. In the first one, we show that the strong interacting limit of a topological Bose-Hubbard model with two species maps onto a 2D XY spin model with frustrated couplings on the honeycomb lattice. This model displays an exotic phase thats breaks both parity and time reversal symmetry through the stabilization of a chiral order parameter. While the ground-state remains gapped and the original bosonic model is topological, we find a zero Chern number for the groundstate. In the second example, we discuss how spin models are realized in Rydberg based quantum simulators. We discuss a proposal envisionned by colleagues at College de France and perspectives on some relevant information that could be extracted from the Loschmidt echo.

 Jeudi 24 Mai 2018, 16:00 à LPT, 114 LPT-PTH (Particle Theory Seminar of LPT Orsay) hep-ph Josh Ruderman ( NYU ) Four Dark Exceptions Abstract: The observed abundance of dark matter can be explained by a thermal relic that annihilates with a weak scale cross section. This so-called “WIMP miracle” points to dark matter masses near the TeV scale. However, dramatic improvements in the sensitivity of direct detection experiments targeting TeV scale dark matter, and the lack of a discovery so far, motivates exploration beyond the WIMP. I will review three well-known “exceptions” to the WIMP miracle argument: (1) annihilations near a pole, (2) annihilations among multiple channels (“coannihilations”), and (3) annihilations into heavier states (“forbidden channels”). I will argue that forbidden channels and coannihilations are both mechanisms for producing dark matter that is exponentially lighter than the weak scale. I will also introduce a fourth exception, “coscattering,” where the dark matter abundance is produced by inelastic scattering against the thermal bath, instead of annihilations.

 Vendredi 25 Mai 2018, 10:00 à IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/197 ) COURS (Cours) cond-mat|q-bio Rémi Monasson ( ENS Paris ) Unsupervised neural networks: from theory to systems biology (3/6) Abstract: Artificial neural networks, introduced decades ago, are now key tools for automatic learning from data. This series of six lectures will focus on a few neural network architectures used in the context of unsupervised learning, that is, of unlabeled data. \par In particular we will focus on dimensional reduction, feature extraction, and representation building. We will see how statistical physics, in particular the techniques and concepts of random matrix theory and disordered systems, can be used to understand the properties of these algorithms and the phase transitions taking place in their operation. \par Special attention will be devoted to the so-called high-dimensional inference setting, where the numbers of data samples and of defining parameters of the neural nets are comparable. The general principles will be illustrated on recent applications to data coming from neuroscience and genomics, highlighting the potentialities of unsupervised learning for biology. \par Some issues: \\ - What is unsupervised learning? \\ - Hebbian learning for principal component analysis: retarded-learning phase transition and prior information. \\ - Bipartite neural nets and representations: auto-encoders, restricted Boltzmann machines, Boltzmann machines. \\ - Recurrent neural nets: from point to finite-dimensional attractors, temporal sequences. Fichiers attachés: 2017-2018.pdf (4503344 bytes) 2018_Monasson.pdf (4507514 bytes)

 Vendredi 25 Mai 2018, 11:00 à LPTHE, Bibliothèque SEM-LPTHE (Séminaire du LPTHE) cond-mat.stat-mech Bulbul Chakraborty ( Brandeis ) Fragile Matter: Stress Networks and Stability of Athermal Solids Abstract: In this talk, I will discuss a theoretical framework for understanding materials that are fragile. These are marginal solids or highly viscous liquids that emerge out of thermal equilibrium in response to external stresses. Granular materials and non-Brownian colloidal suspensions are well-known examples, however, reconfigurable pathways of force transmission also play an important role in biological systems. In granular materials, external forces such as gravity create rigid and flowing states. The mechanical integrity of these marginal solids is reliant on a filamentary network of stress-bearing structures. An outstanding question in the field has been how the constraints of vectorial force balance influence the response of granular assemblies to stress, and create localized stress pathways. I will present results of recent work showing that the localized response is a consequence of the disorder in the underlying contact network, and can be mapped on to a localization'' problem. I will also discuss an interpretive theory, based on statistical ensembles, of two transitions driven by frictional contacts: shear jamming and discontinuous shear thickening.

 Lundi 28 Mai 2018, 10:45 à LPTMC, Jussieu, tower 13-12, 5th floor, room 5-23 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat.mes-hall Mathieu Salanne ( Phénix (Jussieu) ) Modeling supercapacitors at the molecular scale Abstract: The electric double layer is generally viewed as simply the boundary that interpolates between an electrolyte solution and a metal surface. Contrary to that view, recent studies have shown that the interface between ionic liquids and metallic electrodes can exhibit structures and fluctuations that are not simple reflections of surrounding bulk materials [1]. The charge of the electrode is screened by the interfacial fluid and induces subtle changes in its structure, which cannot be captured by the conventional Gouy-Chapman theory. In recent years, this topic has been more intensively addressed in order to develop more efficient supercapacitors [2]. The latter are electrochemical devices that store the charge at the electrode/electrolyte interface through reversible ion adsorption. In order to understand the molecular mechanisms at play, we have performed molecular dynamics simulations on a variety of systems made of ionic liquids and electrodes of different geometries ranging from planar to nanoporous. A key aspect of our simulations is to use a realistic model for the electrodes, by allowing the local charges on the atoms to vary dynamically in response to the electrical potential caused by the ions and molecules in the electrolyte [3]. These simulations have allowed us to gain strong insight on the structure and dynamics of ionic liquids at electrified interfaces. From the comparison between graphite and nanoporous carbide-derived carbon (CDC) electrodes, we have elucidated the microscopic mechanism at the origin of the increase of the capacitance enhancement in nanoporous carbons [4]. We have also studied the impact of the carbon texture, by comparing CDC with perforated graphene materials [5]. References: 1. Fedorov, M.V., Kornyshev, A.A., Chem. Rev., 114 (2014), 2978-3036 2. Salanne, M., Rotenberg, B., Naoi, K., Kaneko, K., Taberna, P.L., Grey, C.P., Dunn, B., Simon, P., Nature Energy, 1 (2016), 16070 3. Merlet, C., Pean, C., Rotenberg, B., Madden, P.A., Simon, P., Salanne, M., J. Phys. Chem. Lett., 4 (2013), 264-268 4. Merlet, C., Rotenberg, B., Madden, P.A., Taberna, P.L., Simon, P., Gogotsi, Y., Salanne, M., Nature Materials, 11 (2012), 306-310 5. Mendez-Morales, T., Burbano, M., Haefele, M., Rotenberg, B., Salanne M., J. Chem. Phys., 148 (2018), 193812

 Lundi 28 Mai 2018, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-PHM (Séminaire de physique mathématique) math-ph Dhritiman Nandan ( Univ. of Edinburgh, Higgs Centre for Theoretical Physics ) New structures in the perturbative S-matrix of Einstein-Yang-Mills theory Abstract: In this talk I will discuss recent developments in the study of scattering amplitudes in Einstein-Yang-Mills Theory. I will present novel relations between tree-level amplitudes in this theory and YM theory. Finally, I will discuss unitarity based observations regarding rational one-loop amplitudes involving gluons and gravitons.

 Lundi 28 Mai 2018, 14:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-STA (Séminaire de Physique Statistique, CEA/Saclay) cond-mat Leticia Cugliandolo ( LPTHE ) Dynamics of isolated classical disordered many-body systems Abstract: Much much work has been recently devoted to the study of the dynamics of quantum isolated systems after a sudden change in the Hamiltonian. In this talk I will describe the evolution of a family of isolated classical many-body disordered systems after instantaneous quenches of the same kind. The aim of these studies was to disentangle effects due to the quantum/classical nature of the systems from those intimately linked to the isolation and internal interactions (integrability vs. Non-integrability). I will emphasise the discussion of the dynamic phase diagram and the possible measures reached asymptotically (comparing Gibbs-Boltzmann equilibrium to Generalised Gibbs Ensemble probabilities).

 Mardi 29 Mai 2018, 11:00 à LPTMS, LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay LPTMS (Séminaire du Laboratoire de Physique Théorique et Modèles Statistiques (Orsay)) physics Shamashis Sengupta ( CSNSM, Université Paris-Sud ) Gate-tunable superconductivity in oxide heterostructures Abstract: The realization of two-dimensional electronic gases (2DEGs) in oxide-based heterostructures (e.g. LaAlO3/SrTiO3) has led to important discoveries about superconductivity in low dimensions. There have been reports of the observation of pairing interactions without superconductivity (Cheng et al., Nature 521, 196 (2015)) and density-of-states features resembling the pseudogap in cuprates (Richter et al., Nature 502, 528 (2013)). Consequently, this 2DEG has emerged as a model system to study the physics of Cooper pair formation in two dimensions and to gain useful insights about complex problems, e.g., the phase diagram of high temperature superconductors. In this talk, we will discuss about a new method developed in our group for realizing such superconducting systems in oxide heterostructures, and the results of experiments to characterize their properties. Due to the low carrier density, it is possible to change it using a gate voltage following the principle of a field-effect transistor. The superconducting critical parameters (temperature and field) are tunable as a function of the gate voltage, leading to a ‘superconducting dome’ in the phase diagram. The possibility of continuously varying the carrier density allows us to study different equilibrium and non-equilibrium features characterizing the electronic phases. Results of some recent experiments will be presented.

 Mardi 29 Mai 2018, 11:30 à LPTENS, LPTENS library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th Jun Nian ( Riemann Center for Geometry and Physics ) Gravity dual of 2d N=(2,2)* gauge theories and integrable models Abstract: Nekrasov and Shatashvili have found a large class of gauge theories in the Omega background, which are dual to some quantum integrable models. Later, the string dual was constructed by Hellerman, Orlando and Reffert in a series of papers. Alternatively, one can also construct the gravity dual of these theories using the gauge/gravity correspondence. In this talk, we will discuss the simplest example, the gravity dual of the 2d N=(2,2)* supersymmetric Yang-Mills (SYM) theory, which can be viewed as the mass deformation of the 2d N=(4,4) SYM theory and is dual to the simplest integrable model, the nonlinear Schrödinger equation. The technique is similar to the construction of the 4d N=2* SYM theory. Eventually, we will identify the mass deformation parameter with the twisted mass and find its counterpart on the gravity side, and we will also see the correspondence between solitons in the integrable model and D-branes. Possible generalizations to the full Nekrasov-Shatashvili duality will also be discussed. This talk is based on the paper arXiv:1706.09016 and some work in progress.

 Mardi 29 Mai 2018, 14:00 à APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th Cédric Deffayet ( IAP ) Galileon p-form theories Abstract: I will discuss the generalization to p-forms of the Galileon idea: to construct the most general theory of an (abelian gauge invariant) p-form with (strictly) second order field equations. Such theory have recently be fully classified for space-time dimension strictly smaller than 12. The covariantization of these theories will also be discussed.

 Mardi 29 Mai 2018, 17:15 à DPT-PHYS-ENS, Jean Jaures (29 rue d'Ulm) SEM-PHYS-ENS (Colloquium du Département de Physique de l'ENS) physics.bio-ph William Bialek ( Princeton University ) Towards a renormalization group for networks of neurons Abstract: In many systems we can describe emergent macroscopic behaviors, quantitatively, using models that are much simpler than the underlying microscopic interactions; we understand the success of this simplification through the renormalization group. Could similar simplifications succeed in complex biological systems? I will discuss explicit coarse-graining procedures, analogous to real-space and momentum space RG, that we apply to experimental data on the electrical activity in large populations of neurons in the mouse hippocampus. Probability distributions of coarse-grained variables seem to approach a fixed non-Gaussian form, and we see evidence of power-law dependencies in both static and dynamic quantities as we vary the coarse-graining scale over two decades. Taken together, these results suggest that the collective behavior of the network is described by a non-trivial fixed point.

 Jeudi 31 Mai 2018, 10:00 à IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th David Kutasov ( U Chicago ) TBA

 Jeudi 31 Mai 2018, 11:45 à IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th Clay Cordova ( IAS ) TBA

 Vendredi 1 Juin 2018, 10:00 à IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/197 ) COURS (Cours) cond-mat|q-bio Rémi Monasson ( ENS Paris ) Unsupervised neural networks: from theory to systems biology (4/6) Abstract: Artificial neural networks, introduced decades ago, are now key tools for automatic learning from data. This series of six lectures will focus on a few neural network architectures used in the context of unsupervised learning, that is, of unlabeled data. \par In particular we will focus on dimensional reduction, feature extraction, and representation building. We will see how statistical physics, in particular the techniques and concepts of random matrix theory and disordered systems, can be used to understand the properties of these algorithms and the phase transitions taking place in their operation. \par Special attention will be devoted to the so-called high-dimensional inference setting, where the numbers of data samples and of defining parameters of the neural nets are comparable. The general principles will be illustrated on recent applications to data coming from neuroscience and genomics, highlighting the potentialities of unsupervised learning for biology. \par Some issues: \\ - What is unsupervised learning? \\ - Hebbian learning for principal component analysis: retarded-learning phase transition and prior information. \\ - Bipartite neural nets and representations: auto-encoders, restricted Boltzmann machines, Boltzmann machines. \\ - Recurrent neural nets: from point to finite-dimensional attractors, temporal sequences. Fichiers attachés: 2017-2018.pdf (4503344 bytes) 2018_Monasson.pdf (4507514 bytes)

 Lundi 4 Juin 2018, 09:00 à IPHT, Amphi Claude Bloch, Bât. 774 ( https://indico.in2p3.fr/event/17044/ ) WORK-CONF (Workshop or Conference) physics ... ( IPhT ) 23th Itzykson Conference (June 04-06, 2018): Statistical Physics of Disordered and Complex Systems, a Tribute to Cirano De Dominicis Abstract: The 23rd Claude Itzykson Conference, which will take place in the Bloch Amphitheater from June 4 to 6, 2018, is dedicated to our colleague and friend Cirano De Dominicis who was the head and a prominent member of our laboratory for many years. \\ \par The themes of the conference will cover the scientific interests of Cirano: \\ Quantum Systems, \\ Out of Equilibrium Statistical Physics, \\ Disordered Systems and Spin Glasses, \\ Interdisciplinary Systems. \\ \\ \\ The website of the conference is: https://indico.in2p3.fr/event/17044/ \\ \\ Organizing committee: Giulio Biroli, Edouard Brézin, Henri Orland and Laure Sauboy (secretary). \\ \\ Sponsors and benefactors: IPhT (CEA and CNRS), DRF, LabEx LMH.

 Lundi 4 Juin 2018, 10:45 à LPTMC, Jussieu, room 5-23, 5th floor, tower 13-12 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat.mes-hall Mathias/alexis Casiulis/poncet ( LPTMC ) Collective motion in an ideal spin fluid/Tagged particles in single-file systems

 Mardi 5 Juin 2018, 11:30 à LPTENS, LPTENS library STR-LPT-ENS-HE (Séminaire commun LPTENS/LPTHE) hep-th Pietro Longhi ( Uppsala ) TBA Abstract: TBA

 Mardi 5 Juin 2018, 14:00 à APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th Tomislav Prokopec ( Utrecht University ) TBA

 Mardi 5 Juin 2018, 16:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-HEP (Séminaire de physique des particules et de cosmologie) hep-ph Csaba Csaki ( Cornell University ) (TBA)

 Mercredi 6 Juin 2018, 10:30 à IHES, Centre de conférences Marilyn et James Simons ( Séminaire de Géométrie Arithmétique Paris-Pékin-Tokyo ) MATH-IHES (TBA) hep-th Nicolas Templier ( Cornell University ) On the Ramanujan conjecture for automorphic forms over function fields Abstract: Let G be a reductive group over a function field of large enough characteristic. We prove the temperedness at unramified places of automorphic representations of G, subject to a local assumption at one place, stronger than supercuspidality. Such an assumption is necessary, as was first shown by Saito-Kurokawa and Howe-Piatetskii-Shapiro in the 70's. Our method relies on the l-adic geometry of Bun_G, and on trace formulas. Work with Will Sawin.

 Mercredi 6 Juin 2018, 11:30 à IPN, Bâtiment 100, Salle A015 (  ) IPN-THEO (Séminaire du groupe de physique théorique de l'IPN Orsay) nucl-th Takahiro Mizusaki ( Senshu University, Japan ) Pfaffian, Onishi formula and Wick's theorem Abstract: Since the pioneering work of Robledo [1], the Pfaffian has been extensively studied in nuclear physics. With the use of the Grassmann integrals, his work gives an excellent answer to the sign-problem in the overlap between HFB wave functions (Onishi formula [2] proposed in half a century ago). After Robledo's work, I have also studied some extensions [3] and applications. Here I will talk about the following topics: \begin{enumerate} \item Basics of Pfaffian and matrix elements of quantum many-body system \item Pfaffian and sign-problem of Onishi formula \begin{itemize} \item Pfaffian formula for overlap of HFB wave functions \item Origin of the sign-problem and liked cluster theorem \end{itemize} \item Pfaffian and Wick's theorem \end{enumerate} I will show some examples of Pfaffian in other fields of quantum many-body physics.\\ \newline [1] L.M. Robledo, Phys. Rev. C 79 (2009), 021302(R).\newline [2] N. Onishi, S. Yoshida, Nucl. Phys. 80 (1966) 367.\newline [3] M. Oi, T. Mizusaki, Phys. Lett. B 707 (2012) 305, T. Mizusaki, M. Oi, Phys. Lett. B 715 (2012) 219,T. Mizusaki, M. Oi, F. Chen, Y. Sun, Phys. Lett. B 725 (2013) 175, T.Mizusaki, M.Oi, N.Shimizu, Phys. Lett. B779 (2018) 237. Fichiers attachés: 2018_06_06_T_Mizusaki.pdf (217725 bytes)

 Mercredi 6 Juin 2018, 14:15 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) hep-th Ida Zadeh ( ETH Zurich ) (TBA)

 Vendredi 8 Juin 2018, 10:00 à IPHT, Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/197 ) COURS (Cours) cond-mat|q-bio Rémi Monasson ( ENS Paris ) Unsupervised neural networks: from theory to systems biology (5/6) Abstract: Artificial neural networks, introduced decades ago, are now key tools for automatic learning from data. This series of six lectures will focus on a few neural network architectures used in the context of unsupervised learning, that is, of unlabeled data. \par In particular we will focus on dimensional reduction, feature extraction, and representation building. We will see how statistical physics, in particular the techniques and concepts of random matrix theory and disordered systems, can be used to understand the properties of these algorithms and the phase transitions taking place in their operation. \par Special attention will be devoted to the so-called high-dimensional inference setting, where the numbers of data samples and of defining parameters of the neural nets are comparable. The general principles will be illustrated on recent applications to data coming from neuroscience and genomics, highlighting the potentialities of unsupervised learning for biology. \par Some issues: \\ - What is unsupervised learning? \\ - Hebbian learning for principal component analysis: retarded-learning phase transition and prior information. \\ - Bipartite neural nets and representations: auto-encoders, restricted Boltzmann machines, Boltzmann machines. \\ - Recurrent neural nets: from point to finite-dimensional attractors, temporal sequences. Fichiers attachés: 2017-2018.pdf (4503344 bytes) 2018_Monasson.pdf (4507514 bytes)

 Vendredi 8 Juin 2018, 14:15 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) hep-th Suvrat Raju (tbc) ( ICTS, Tata Institute of Fundamental Research ) (TBA)

 Lundi 11 Juin 2018, 10:55 à LPTMC, Jussieu, room 5-23, 5th floor, tower 13-12 SEM-LPTMC (Séminaire du Laboratoire de Physique Théorique de la Matière Condensée) cond-mat.mes-hall Thierry Dauxois ( ENS Lyon ) TBA

 Lundi 11 Juin 2018, 11:00 à IPHT, Salle Claude Itzykson, Bât. 774 IPHT-PHM (Séminaire de physique mathématique) math-ph Oleg Lisovyi ( Tours ) Fonctions tau et constantes de Widom-Dyson

 les séminaires archivés archivés avec fichiers aujourd'hui cette semaine demain la semaine prochaine sous huit jours tous à venir dans la série Toutes 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 FCMP FORUM-ENS 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-COSM 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 P^3 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 à l' institut Tous 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 dans le domaine Tous 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 et dont le champ Orateur Titre Resumé Domaine comprend la séquence

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