Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 37: MLT: Poster Session
TT 37.20: Poster
Donnerstag, 25. März 2010, 14:00–18:00, Poster A
Probing Local Relaxation of Cold Atoms in Optical Superlattices — •Andreas Flesch1,2, Marcus Cramer3, Ian P. McCulloch4, Jens Eisert3,5, and Ulrich Schollwöck1,6 — 1Institut für Theoretische Physik C, RWTH Aachen University, 52056 Aachen — 2Institut für Festkörperforschung and Institute for Advanced Simulation, Forschungzentrum Jülich, 52425 Jülich — 3Institute for Mathematical Sciences, Imperial College London, SW7 2PE London — 4School of Physical Sciences, The University of Queensland, Brisbane, QLD 4072 — 5Institute for Physics and Astronomy, University of Potsdam, 14476 Potsdam — 6Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, 80333 München
Ultracold atoms in optical superlattices are a promising candidate for the experimental investigation of relaxation processes in coherent non-equilibrium dynamics of quenched quantum systems. We study the evolution of a particular initial state prepared in a superlattice structure under a Bose-Hubbard Hamiltonian in the entire range of interaction strengths using mainly a t-DMRG approach [1,2]. By the investigation of certain correlation functions, we show that the proposed setup allows to experimentally probe signatures of local relaxation of subsystems in non-equilibrium dynamics. First experimental results [3] are in a very good agreement with the theoretical predictions.
[1] M. Cramer et al., PRL 101, 063001 (2008)
[2] A. Flesch et al., PRA 78, 033608 (2008)
[3] S. Trotzky and I. Bloch, private communication