Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 83: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems I

TT 83.1: Topical Talk

Donnerstag, 3. April 2014, 09:30–10:00, HSZ 03

Kinetic Theory for the Relaxation of Quantum Many-Body Systems — •Marcus Kollar — Theoretische Physik III, Zentrum für Elektronische Korrelationen und Magnetismus, Universit*ät Augsburg

After being forced out of equilibrium, an isolated quantum many-body system is expected to relax to thermal equilibrium, unless it is integrable and retains memory of the initial state due to a large number of constants of motion. For weak interactions a large number of approximate constants of motion leads to a short-time prethermalization regime [1], which we discuss for several interacting systems in high and low dimensions. We then use a weak-coupling kinetic theory [2] to describe both the initial prethermalization regime as well as the subequent crossover towards the thermal state.

[1] M. Kollar, F. A. Wolf, and M. Eckstein, PRB 84, 054304 (2011).

[2] M. Stark and M. Kollar, arXiv:1308.1610.