Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 32: Poster: Quantum gases, ultracold atoms and molecules
Q 32.28: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
BEC dynamics in the presence of a synthetic magnetic field — •Andrey R. Kolovsky1, Fabian Grusdt2, and Michael Fleischhauer2 — 1Siberian Federal University, 660049 Krasnoyarsk, Russia — 2TU Kaiserslautern, 67663 Kaiserslautern, Germany
We study dynamics of BEC of non-interacting atoms in a 2D parabolic lattice (i.e., the lattice plus harmonic confinement) in the presence of a synthetic magnetic field. The analysis is preceded by thorough consideration of the single-particle spectrum of the system. We show that generally this spectrum consists of two, regular and chaotic components. The relative fraction of chaotic eigenstates depends on the mean energy of an atom and changes from zero to one when the energy is increased. This property of the system is reflected in BEC dynamics which we assume to be induced by a sudden shift of the harmonic trap origin or by a time-dependent flux (a circular electric field).