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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster Quantengase

Q 27.12: Poster

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

Transport of Bose-Einstein condensates through two-dimensional mesoscopic structures — •Timo Hartmann, Michael Hartung, Klaus Richter, and Peter Schlagheck — Institut für theoretische Physik, Universität Regensburg

The tremendous progress over the last decade in the experimental techniques for Bose-Einstein condensates permits the creation of almost arbitrarily shaped confinement geometries for interacting matter waves on the basis of atom chips or atom-optical billiards [1]. This opens new experimental possibilities for probing the transport properties of Bose-Einstein condensates through mesoscopic scattering geometries.

We numerically investigate the quasi-stationary propagation of a condensate through two dimensional cavities within the mean-field approximation of the condensate. This is accomplished using a generalisation of the approach used in Ref. [2] to two dimensions. Special attention is paid to the resonance structures in the transmission spectrum which are strongly modified through the non-linear term in the Gross-Pitaevskii equation.
[1] V. Milner et al. Phys. Rev. Lett. 86, 1519 (2001), N. Friedman et al. Phys. Rev. Lett. 86, 1518 (2001)
T. Paul et al., Phys. Rev. Lett. 94 (2005)