Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster III
Q 56.22: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Feshbach Resonances of 6Li and 133Cs — •Arthur Schönhals1, Marc Repp1, Rico Pires1, Juris Ulmanis1, Stephan Häfner1, Robert Heck1, Eva Kuhnle1, Matthias Weidemüller1, and Eberhard Tiemann2 — 1Physikalisches Institut, Ruprecht-Karls Universität Heidelberg, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, Germany
In this poster we present the first observation of interspecies Feshbach resonances of an ultracold Bose-Fermi mixture of 6Li and 133Cs in their energetically lowest spin states [1]. The mixture was prepared and loaded into an optical dipole trap, where resonances were detected as spin selective atom losses. In this way nineteen loss features could be observed and were assigned to s-and p-wave resonances by using a coupled-channel calculation. In addition, the results were compared with the Asymptotic Bound State Model.
Several of the s-wave resonances offer prospects for the investigation of a series of Efimov states, for which the mixture of 6Li and 133Cs is an excellent candidate due to the large mass ratio of mCs/mLi = 22 that results in an universal scaling factor of 4.88 for 133Cs26Li [2,3].
[1] M.Repp et al., accepted for publication in Phys. Rev. A. (R), (2012)
[2] J. P. D’Incao & B.D. Esry, Phys. Rev. A 73, 030703 (2006)
[3] E.Braaten and H.-W. Hammer, Annals of Physics 322, 120 (2007)