Hamburg 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 38: Quantengase: Gemische
Q 38.6: Talk
Wednesday, March 4, 2009, 17:45–18:00, VMP 6 HS-A
Strongly interacting Lithium Rubidium mixtures — •Carsten Marzok, Benjamin Deh, Reinhard Maier, Alexander Schilke, Philippe W. Courteille und Claus Zimmermann — Physikalisches Institut, Universität Tübingen, 72076 Tübingen
Ultracold atomic gases are a versatile instrument allowing to study the rich field of many body physics with unprecedented control. In this context, the Li-Rb system can provide particular insights owing to the large mass ratio. Additionaly, both Fermi-Bose mixtures (6Li-87Rb) and Bose-Bose mixtures (7Li-87Rb) can be realized in the same apparatus, further enlarging the range of possible experiments. Up to now, experiments in the strongly interacting regime with these isotopes were hampered by an imprecise knowledge of the heteronuclear scattering parameters particularly with respect to Feshbach resonances. In a series of experiments we now have located two such resonances in the Fermi-Bose-mixture and five in the Bose-Bose mixture. Based on these observations, groups in Berlin (Saenz) and Hannover (Tiemann) have determined the potential curves such that the scattering properties are now well described. We present our experimental observations of the Feshbach resonances and our progress towards the study of the strongly interacting mixtures by means of Bragg spectroscopy.