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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster Quantengase

Q 27.1: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

Transport properties of Bogoliubov excitations in correlated disorder — •Christopher Gaul, Christian J. Harrer, and Cord A. Müller — Universität Bayreuth

We study 2D quantum transport in a many-body system by considering a Bose-Einstein condensate in a correlated disordered optical potential. The correlation length of the disorder potential together with the healing length are the two relevant length scales of the problem. The effective transport characteristics of Bogoliubov excitations are investigated by calculating suitable configuration averages. We obtain the disorder-broadened Bogoliubov dispersion relation, the scattering length, and the transport mean free path. In particular we examine the regime where the disorder correlation length is not the shortest of all length scales.