The first part is dedicated to the study of gravity in vaccuum when the metric depends only of two variables. Using new Lax pair based on sl(2, R) affine twisted algebra by an order 2 automorphism and Virasoro algebra, we obtain a purely algebraic me...
The first part is dedicated to the study of gravity in vaccuum when the metric depends only of two variables. Using new Lax pair based on sl(2, R) affine twisted algebra by an order 2 automorphism and Virasoro algebra, we obtain a purely algebraic me...
This works deals with the mechanical properties of crystalline membranes, which are two-dimensional materials with an underlying periodic lattice at the microscopic scale which provides them with elastic properties. It is one of the scarce examples o...
jury composé de :Pierre BINÉTRUY (Président du jury), Jean-Philippe BOUCHAUD (Rapporteur), Bertrand DELAMOTTE (Directeur de thèse), Malte HENKEL (Rapporteur), Henk HILHORST (Examinateur), Clément SIRE (Examinateur)
We study some aspects of the physics of fermions in two dimensions, which is relevant for quasi one-dimensional organic conductors and for high temperature superconductors. We focus on the computation of the Fermi surface of interacting electronic sy...
The main part of this work consists in the study of spins submitted to competing interactions, and which are therefore frustrated. We give a detailed description of the experimental and numerical situation. We emphasize on the fact that it is necessa...
jury composé de :Pierre BINÉTRUY (Président du jury), Jean-Philippe BOUCHAUD (Rapporteur), Bertrand DELAMOTTE (Directeur de thèse), Malte HENKEL (Rapporteur), Henk HILHORST (Examinateur), Clément SIRE (Examinateur)
We study some aspects of the physics of fermions in two dimensions, which is relevant for quasi one-dimensional organic conductors and for high temperature superconductors. We focus on the computation of the Fermi surface of interacting electronic sy...
The main part of this work consists in the study of spins submitted to competing interactions, and which are therefore frustrated. We give a detailed description of the experimental and numerical situation. We emphasize on the fact that it is necessa...
In this thesis we study the Kardar-Parisi-Zhang (KPZ) equation in two different physical systems. The first is an out-of-equilibrium condensate of Exciton-Polaritons, which are quasi-particle excitations stemming from the interaction between confined...
