Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 1: Quantengase: Bosonen 1

Q 1.3: Vortrag

Montag, 12. März 2012, 11:00–11:15, V53.01

Non-equilibrium dynamics of domain walls in a two-component Bose gas — •Markus Karl1,2, Boris Nowak1,2, and Thomas Gasenzer1,21Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany

The miscibility-immiscibility phase transition in an ultracold binary Bose gas, in one and two spatial dimensions, is simulated using coupled classical field equations in a statistical approach. The dynamics of the transition depends on the time-dependence of the coupling between the two components. Particularly, a dynamical formation of domains can be induced by rapid quenches. Therefore the setup allows to study the non-equilibrium time-evolution of the domain structures. A focus is set on the influence of the domains on the single particle excitation spectrum, which is discussed in the context of turbulent scaling properties known from the single-component Bose gases.

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