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Q: Fachverband Quantenoptik und Photonik

Q 38: Quantengase: Gemische

Q 38.5: Talk

Wednesday, March 4, 2009, 17:30–17:45, VMP 6 HS-A

Interspecies interaction in a strongly imbalanced Bose-Bose mixture — •Tatjana Weikum, Shincy John, Nicolas Spethmann, Claudia Weber, Artur Widera, and Dieter Meschede — Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany

We magnetically trap a Bose-Bose mixture of Rubidium and few Caesium atoms simultaneously. Cs is sympathetically cooled by evaporatively cooled Rb in a magnetic trap to a temperature below 1 µK. The ultracold mixture is loaded into an optical dipole trap. We will present the latest results on the interspecies interaction in an external homogeneous magnetic field. A sensitive fluorescence detection technique is incorporated into the experiment to be able to observe single or very few Cs atoms.