Dresden 2014 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Statistical Physics far from Thermal Equilibrium - Part II
DY 6.1: Hauptvortrag
Montag, 31. März 2014, 15:00–15:30, ZEU 160
Odd Bose condensation far from equilibrium — Daniel Vorberg1,2, Waltraut Wustmann1,2, Roland Ketzmerick1,2, and •André Eckardt1 — 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany — 2Technische Universität Dresden, Institut für Theoretische Physik, 01187 Dresden, Germany
Bose-Einstein condensation, the macroscopic occupation of a single quantum state, appears in equilibrium quantum statistical mechanics. We show that even when a degenerate Bose gas is driven into a steady state far from equilibrium, e.g. by time-periodic driving, Bose-Einstein condensation survives in a generalized form [1]: the unambiguous selection of an odd number of states acquiring large occupations.
We study the effect in driven-dissipative model systems and propose a quantum switch for heat conductivity based on shifting between one and three Bose selected states.
[1] D Vorberg, W Wustmann, R Ketzmerick, and A Eckardt, Phys. Rev. Lett. 111, 240405 (2013)