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: the unambiguous selection of an odd number of states acquiring large occupations.

We study the effect in driven-dissipative model systems. We find anomalously long-range order in one dimension and propose a quantum switch for heat conductivity based on shifting between one and three Bose selected states.


Seminar, November 5, 2014, 12:00. Seminar Room

Hosted by Prof. Maciej Lewenstein