Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quantengase (Unordnung)
Q 12.8: Vortrag
Montag, 19. März 2007, 18:15–18:30, 6J
Anderson localization in guided beams of Bose condensed atoms — •Tobias Paul1, Patricio Leboeuf1, Peter Schlagheck2, and Nicolas Pavloff1 — 1Laboratoire de Physique Théorique et Modèles Statistiques, Universite Paris Sud, Batiment 100, F-91405 Orsay Cedex — 2Institut für Theoretische Physik, Universität Regensburg, D–93040 Regensburg
Recently the influence of atom-atom interactions on the phenomenon of Anderson localization has been investigated by a series of experimental [1] and theoretical studies [2,3] on BEC systems. Following up these works, the objective of this contribution is to demonstrate that the scenario of Anderson localization is preserved in a quasi 1D coherent beam of weakly interacting Bose condensed atoms. For that purpose we study the coherent flow of a condensate through a disordered potential formed by a series of uncorrelated delta scatterers. This particular disorder model allows an analytical treatment within which we recover the well known picture of Anderson localization, with a rescaled localization length in the presence of a weak atom-atom interaction. Complementary numerical computations indicate that this behaviour is generic and does not depend on the specific structure of the disordered potential.
[1] D. Clement et al. Phys. Rev. Lett. 95, 170409 (2005)
[2] B. Damski et al. Phys. Rev. Lett. 91, 080403 (2003)
[3] T.Paul, et al. Phys. Rev. A 72, 063621 (2005)