Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Quantum Gases (Fermions) II

Q 35.1: Talk

Tuesday, March 6, 2018, 14:00–14:15, K 1.022

Artificial gauge potentials in periodically driven optical lattices: numerical simulations of atomic transport — •Ana Hudomal1, Ivana Vasić1, Hrvoje Buljan2, Walter Hofstetter3, and Antun Balaž11Scientific Computing Laboratory, Center for the Study of Complex Systems, Institute of Physics Belgrade, University of Belgrade, Serbia — 2Department of Physics, University of Zagreb, Croatia — 3Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany

Artificial gauge potentials have been recently realized in cold-atom experiments with periodically driven optical lattices [1,2]. In such systems, atoms subjected to a constant external force gain an anomalous velocity in the direction transverse to the direction of the applied force. Taking into consideration realistic experimental conditions, we perform numerical simulations in order to investigate the dynamics of atomic clouds and relate it to the Chern number of the effective model. We use the full time-dependent Hamiltonian and take into account the effects of weak repulsive interactions between atoms. The results are compared to the semiclassical approximation.

[1] G. Jotzu et al., Nature 515, 237 (2014).

[2] M. Aidelsburger et al., Nature Phys. 11, 162 (2015).

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