Speakers: Sylvain Ribault (IPhT, Saclay)I will review the basic principles of two-dimensional conformal field theory, and some important results. First I will explain the origin and consequences of the existence of a

Speakers: Sylvain Ribault (IPhT, Saclay)I will describe the limit of D-series minimal models when the central charge tends to a generic irrational value c<1. I will show that the limit theory's three-point

Speakers: Mikhail Isachenkov (IHES)Conformal bootstrap programme in the spacetime dimensions d>2 has seen a revival in the last decade. I will describe a direct connection between the important constituents of the bootstrap

Speakers: Honda Masazumi (University of Cambridge)I will talk about supersymmetric index of 4d N=1 supersymmetric theories on S^1xM_3 which counts supersymmetric states.  In the first part, I will discuss a general formula

Speakers: Ali Zahabi (Université de Bourgogne)First, we review the BPS sector in N = 2, four-dimensional toric quiver gauge theories and its relation to crystal melting model and dimer model. Then, we

Speakers: Yutaka Shikano (Keio University)A cloud quantum computer is similar to a random number generator in that its physical mechanism is inaccessible to the users. In this respect, a cloud quantum computer

Speakers: Stefan Hohenegger (Université Claude Bernard Lyon 1)In this talk, I discuss so-called Little String Theories (LSTs), which are a type of interacting quantum theories whose UV-completion contains string-like (i.e. extended) degrees

Speakers: Georgy Sharygin (ITEP, Moscow State University)The full symmetric Toda system is a straightforward generalization of the usual (3-diagonal) system; it can be further generalized to the case of Cartan decomposition of

Speakers: Nicolas Besset (Institut Fourier, Université Grenoble Alpes)We consider the charged Klein-Gordon equation outside the De Sitter-Reissner-Nordström black hole. The product of the charge of the field and the charge of the

Speakers: Juan Valiente-Kroon (Queen Mary University of London)In this talk I will reconsider the problem of comparing initial data to a reference solution for the vacuum Einstein field equations is considered. To

Speakers: Atsuo Kuniba (University of Tokyo)Box-ball system (BBS) is a distinguished example ofsoliton cellular automaton in one dimension.Its integrability has been studied extensively from the viewpoint ofquantum groups, Bethe ansatz, ultradiscretization and

Speakers: Alexander Alexandrov (IBS Center for Geometry and Physics, POSTECH)https://indico.math.cnrs.fr/event/5678/

Speakers: Robin Tucker (Lancaster University)https://indico.math.cnrs.fr/event/5643/

Speakers: Frédéric Hélein (Université de Paris)https://indico.math.cnrs.fr/event/6106/

We provide a necessary and sufficient condition for the uniqueness of penalized least-squares estimators whose penalty term is given by a norm with a polytope unit ball, covering a wide range of

In this talk we explore the issue of black hole quasi-normal mode (QNM) instability. Specifically, by adopting a hyperboloidal approach to QNMswe cast the QNM problem as an eigenvalue problem for a non-selfadjointoperator.

Speakers: Geneviève Dusson (Université de Franche-Comté)In this talk, I will present and analyse a method to solve self-adjoint eigenvalue problems. This method is based on the Feshbach-Schur map (i.e. a Schur complement)

https://indico.math.cnrs.fr/event/6124/

Fusion categories arise in the study of conformal field theory While Rep(G) for G a finite group is the primary example of a fusion category, categories which are Morita equivalent to Rep

Speakers: Amir-Kian Kashani-Poor (École normale supérieure)In this talk, we will give a leisurely introduction to the topological string, emphasizing its multi-faceted nature inherited from its parent theory, string theory. As a concrete

The quantum differential equation (qDE) is a rich object attached to a smooth projective variety X. It is an ordinary differential equation in the complex domain which encodes information of the enumerative

La DFT (density functional theory) est la méthode la plus efficace pour modéliser la matière à l'échelle microscopique, elle est extensivement utilisée en physique et chimie quantique à N corps. Elle peut

https://www.mathconf.org/qddijon2021https://indico.math.cnrs.fr/event/6528/

La compréhension de la cohomologie des espaces des modules des courbes est un problème de longue date en géométrie algébrique. Ce qui est surprenant, c'est le degré de motivation que ce problème

 After refreshing the well-known works by Mulase, Reyman and Semenov-Tian-Shanski on the algebraic integration of the Kadomtsev-Petviashvili (KP) hierarchy via r-matrices, we show in this talk:- firstly how the classical algebra of 

In this work we investigate propagation of smallness properties for solutions to heat equations. We consider spectral projector estimates for the Laplace operator with Dirichlet or Neumann boundary conditions on a Riemanian

We consider the model of an uncharged massive particle linearly coupled to a quantized radiation field, widely referred to as Nelson model. Despite having the character of a toy model from the

La journée d'équipe se tiendra en hybride: en salle rené Baire et sur TEAMS.Programme: 9h45-10h10 exposé de Nicolas Babinet 10h15-10h40 exposé de Eddy Brandon De León 10h45-11h Pause (café) 11h-11h25 exposé de

Semiclassical analysis can be employed to describe surface waves in an elastic half space which is quasi-stratified near its boundary. The propagation of such waves is governed by effective Hamiltonians on the

In this talk, it takes into account the KdV equation as an approximate model of long waves of small amplitude at the free surface with inviscid fluid. It is demonstrated that the

A quantum group is the mathematical structure responsible for the integrability of quantum systems, it has been formulated by Drinfeld and Jimbo in 1985. More recently, the refined notion of "shifted quantum

In their study of deformed W-algebras associated with complex simple Lie algebras, E. Frenkel-Reshetikhin (1998) introduced certain two parameter deformations of the Cartan matrices. They play an important role in the representation

I will present new results in the separation of variables (SoV) program for integrable models. The SoV methods are expected to be very powerful but until recently have been barely developed beyond

I will start with a brief review of large-N tensor models, and of some of their applications in theoretical physics. On the one hand, they provide a general platform to investigate random

I will briefly review the concept of magnetic quiver. It is a tool that allows the analysis of certain moduli spaces of physical theories. We will see how this can be used to attempt

Le resumé est disponible au format pdf en cliquant icihttps://indico.math.cnrs.fr/event/7153/

There is no notion of local gravitational energy density. Gravity manifests itself as curvature of spacetime, and its strength can be measured by using variations of the elementary geometric quantities (area, volume,

Statistical manifolds are family of density functions with respect to some measure endowed to geometric structures used to model information, their field of study belonging to Information Geometry, a relatively recent branch

Scattering theories are of great importance for many problems in General Relativity, and scattering in the interior of a black hole is particularly relevant in the context of the cosmic censorship conjecture

This talk concerns the (generalized) Soler model: a nonlinear (massive) Dirac equation with a nonlinearity taking the form of a space-dependent mass. The equation admits standing wave solutions and they are generally