Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 15: Controlling Dirty Bosons: Disorder Effects on BECs

DY 15.5: Vortrag

Dienstag, 26. Februar 2008, 15:30–15:45, MA 001

Tracking Bogoliubov excitations in correlated disorder — •Cord A. Müller and Christopher Gaul — Physikalisches Institut, Universität Bayreuth, 95440 Bayreuth, Germany

In order to study the interplay of interaction and disorder in atomic BECs, we investigate the transport properties of Bogoliubov excitations in the presence of correlated spatial potential fluctuations [1]. In two dimensions, we find that the scattering cross-section of Bogoliubov excitations by an elementary obstacle has a node, which can be explained analytically in the hydrodynamic description. We further explore the consequences for the multiple-scattering regime in a correlated disordered potential by calculating relevant transport lengths.

[1] R.C. Kuhn et al, New J. Phys. 9, 161 (2007)