Frankfurt 2006 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 34: Poster Quantengase

Q 34.18: Poster

Dienstag, 14. März 2006, 16:30–18:30, Labsaal

Towards Feshbach resonaces in an ultracold mixture of ⁶Li and ⁸⁷Rb — •Carsten Marzok, Benjamin Deh, Christian Silber, Sebastian Günther, Philippe W. Courteille, and Claus Zimmermann — Physikalisches Insitut, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany

The interatomic potentials of ultracold fermionic ⁶Li and bosonic ⁸⁷Rb are currently only inaccurately known. Measuring locations of Feshbach resonances tightens constraints on these potentials since Feshbach resonances are extremely sensitive to the position of the last bound state of the interatomic groundstate potential. Furthermore, Feshbach resonances provide a powerful tool for transforming atoms into molecules. As proposed by Stwalley, such vibronically excited dipolar molecules could be converted into stable groundstate molecules by a coherent STIRAP process [1]. We will perform a search for Feshbach resonances by loading a quantum degenerate mixture of ⁶Li and ⁸⁷Rb recently realized in our group [2] into an optical dipole trap and scanning a magnetic field. We describe the status of the implementation of the dipole trap and the results to date.

[1] W.C. Stwalley, Eur. Phys. J. D 31, 221–225 (2004)

[2] C. Silber et al., Phys. Rev. Lett. 95, 170408 (2005)