Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster Quantengase

Q 64.11: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster C

Interacting Rubidium and Caesium Atoms — •Shincy John, Michael Haas, Vanessa Leung, Lars Steffens, Claudia Weber, Daniel Frese, Dietmar Haubrich, Arno Rauschenbeutel, and Dieter Meschede — Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, 53115 Bonn

In our experimental set up we simultaneously store Rubidium and Caesium in a magnetic trap. We use species-selective microwave cooling on the Rubidium groundstate hyperfine transition. Caesium is sympathetically cooled via elastic collisions with Rubidium. We are thus able to cool down the mixture to temperatures below 1 µK. Below 4 µK we observe strong losses of Caesium.
Analysing the dynamics of sympathetic cooling we are able to estimate a lower limit for the Rubidium-Caesium s-wave scattering length.