Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 62: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 1

TT 62.10: Vortrag

Donnerstag, 23. März 2017, 12:15–12:30, HSZ 304

Quantum quenches in many-body localized systems — •Johannes Hauschild¹, Fabian Heidrich-Meisner², and Frank Pollmann¹ — ¹Fakultät für Physik, Technische Universität München, D-85748 Garching — ²Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, D-80333 München

The field of many-body localization has recently attracted considerable theoretical and experimental interest. Many-body localized phases occur in interacting systems and are characterized by the absence of transport, the lack of thermalization, as well as the existence of quasi local integrals of motions. Ultra cold atoms have proven to be an ideal experimental test bed to test theoretical predictions. Most of the experiments involve the real time evolution of an initial state prepared by sudden changes in system parameters. First, we numerically investigate signatures of many-body localization by studying the melting of a domain wall after a quantum quench [1]. Second, we consider a dynamical system in which we couple initially hot and cold regions. We show that it is possible to extract characterizing properties like the localization length and the critical disorder strength.

[1] J. Hauschild et al., Phys. Rev. B 94, 161109(R)