Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.4: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Far from equilibrium integrable systems — •Sebastian Erne1,2,4, Thomas Schweigler4, Bernhard Rauer4, Valentin Kasper1, Tim Langen4, Jürgen Berges1, Thomas Gasenzer1,2,3, and Jörg Schmiedmayer4 — 1Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany — 3Kirchhoff-Institut für Physik, INF 227, 69120 Heidelberg, Germany — 4Vienna Center for Quantum Science and Technology (VCQ), Atominstitut, TU Wien, Vienna, Austria
Relaxation of far-from equilibrium integrable systems is to date an open and interesting question. Recent progress in cold atom experiments in low dimensional systems, allow for a detailed study of integrable field theories. Specifically we consider a system of linearly coupled quasi one-dimensional condensates, realizing the quantum sine-Gordon and Lieb-Liniger theories. By studying quenches in the mass of the sine-Gordon model, we are able to explore fundamental questions of quantum physics. In particular we investigate prethermalization and the Generalized Gibbs Ensemble, higher order correlations and their factorization properties in and out of equilibrium, dynamics and decay of topological excitations and false vacua, quantum many body revivals, and tomography of quasiparticle. We compare the experiment to analytical and numerical results, for the latter using the (stochastic) Gross-Pitaevskii equations as well as Monte-Carlo simulations.