Regensburg 2019 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 6: Dynamics in many-body systems: Equilibration and localization I (joint session DY/TT)

DY 6.7: Talk

Monday, April 1, 2019, 11:45–12:00, H19

Many body localized system weakly coupled to thermal environment — •Ling-Na Wu, Alexander Schnell, Giuseppe De Tomasi, Markus Heyl, and André Eckardt — Max Planck Institute for the Physics of Complex Systems

Many body localization (MBL), which describes the failing of an interacting system under disorder to reach thermalization, has attracted widespread attentions. In recent years, the imperfect experimental environment has excited an intense interest in the effect of dissipations on MBL. We formulate an efficient method for the description of MBL systems in weak contact with thermal environments at temperature T. As an example, we study the transport property of a fermion Hubbard chain coupled to a thermal bath and recover a conductivity following Mott's law for variable range hopping. Weak attractive (repulsive) interactions are found to enhance (decrease) the transport, which is attributed to an interaction-induced modification of the density of states due to spatio-energetic correlations. We also study the effect of dissipations on disorder-free localized system and compare it with the conventional disorder-induced localized system.