Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Gases: Bosons II

Q 12.1: Vortrag

Montag, 23. März 2015, 14:30–14:45, P/H2

Dynamics of Bose-Einstein condensates in a one-dimensional correlated disorder potential — •Juan Pablo Ramírez Valdes1, Andreas Buchleitner1,2, and Thomas Wellens11Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Herman-Herder-Str. 3, 79104 Freiburg, Germany — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, Albertstr. 19, 79104 Freiburg

We study the expansion of an initially confined one-dimensional Bose-Einstein condensate in a weak random potential with finite correlation length. At long times, the expansion comes to a halt due to destructive interferences leading to Anderson Localization [1]. We develop an improved analytical description of the asymptotic disorder-averaged condensate density, which we compare to the results of numerical simulations based on a finite-element discrete variable representation. In particular, we thereby analyze the influence of inter-atomic interactions on the localization properties.

[1] L. Sanchez-Palencia, D. Clément, P. Lugan, P. Bouyer, G. V. Shlyapnikov, and A. Aspect, Phys. Rev. Lett. 98, 210401 (2007).

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