Atomes Et Rayonnement

Collège de FranceJean DalibardChaire Atomes et RayonnementAnnée 2022-2023Forces à longue portée dans les gaz quantiques : le problème à trois corps et l'effet EfimovSéminaire - Michael Fleischhauer : To Thermalize or Not? Slow Particle Diffusion in Many-Body LocalizationMichael Fleischhauer, University of Kaiserslautern-Landau, AllemagneExperience tells us that thermodynamics is universal: everything will approach equilibrium if we wait long enough. This is believed to be true also for isolated quantum systems, where all local properties will eventually mimic thermal equilibrium at least for generic interacting many-body systems. Thus no such system should be able to avoid thermalization. In 2006 Basko et al. argued to the contrary and described a phenomenon now known as Many-Body Localization (MBL). They showed that interacting particles in highly disordered one-dimensional lattices localize in space, thus withstanding thermalization. MBL is not only interesting for fundamental reasons but could also provide