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Accueil du site > Séminaires > Séminaires 2019 > Symmetry, density profiles and momentum distribution of multicomponent mixtures of strongly interacting 1D Fermi gases

Mardi 18 juin 2019 - 14:00

Symmetry, density profiles and momentum distribution of multicomponent mixtures of strongly interacting 1D Fermi gases

Mathias Albert (Institut de Physique de Nice)

par Revaz Ramazashvili - 18 juin 2019

Indistinguishable particles are generally classified in two families : the so called bosons and fermions. At the microscopic level, this means that their wave function is either symmetric or anti-symmetric with respect to permutation of particles, which has extremely important consequences at the macroscopic level.

When particles live in a one dimensional world, and are subjected to strong interactions, the situation is much more rich, and a mixture of particles may exhibit more exotic symmetries. Such mixtures are now extremely well-controlled in cold-atom experiments, and are a new laboratory for studying theoretical physics and its applications beyond the zoo of standard elementary particles.

In this talk, we will give an overview of the recent theoretical progresses in this field and how it is connected to real experiments and other fields such as quantum magnetism. We will in particular discuss how to relate abstract theoretical concepts like symmetry over permutation to simple and experimentally observable quantities like the Tan’s contact which is measurable in the velocity distribution of an assembly of particles.

Post-scriptum :

contact : G. Lemarié