Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 32: Poster: Quantum gases, ultracold atoms and molecules
Q 32.2: Poster
Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais
Non-Equilibrium Heating Dynamics of a Luttinger Liquid — •Michael Buchhold1 and Sebastian Diehl1,2 — 1Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria — 2Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
Recent studies of heating and thermalization of interacting one-dimensional (1D) bosons in cold atom experiments have triggered the interest in the non-equilibrium dynamics of low dimensional bosons. In a non-equilibrium Keldysh path integral approach for Luttinger Liquids, we investigate a 1D Bose gas subject to permanent heating.
We determine the non-equilibrium phonon distribution, thereby distinguishing the short distance dynamics, essentially revealing thermal behavior, from the universal non-equilibrium long wavelength dynamics of the system.
The universal behavior is encoded in the exponents of the dissipative phonon decay and leads to modifications of physical observables compared to thermal equilibrium. We demonstrate the effect of heating on relevant experimental signatures, such as the dynamical structure factor or the density of states and show how thermalization processes and universality can be traced from these observables.