Düsseldorf 2007 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 63: Poster Ultrakalte Moleküle
Q 63.2: Poster
Thursday, March 22, 2007, 16:30–18:30, Poster C
Formation of Ground State Strontium Molecules with Optical Feshbach Resonances — •Ruzin Aganoglu1, Philippe Pellegrini2, Robin Côté2, and Christiane Koch1 — 1Freie Universität Berlin, Institut für Theoretische Physik, Arnimallee 14, 14195 Berlin — 2University of Connecticut, Dept. of Physics, 2152 Hillside Road, Storrs, CT 06269-3046, USA
Ultracold earth alkali atoms are attracting interest in both experiment and theory because of the many exciting perspectives they offer from optical frequency clocks and high resolution spectroscopy to the manipulation of ultracold molecules. In the alkali species, magnetic Feshbach resonances proved to be the most efficient way to form molecules in their electronic ground state. Since even isotopes of the earth alkalis possess no hyperfine structure in their ground state, this route to ground state molecules is not available. Photoassociation of e.g. strontium atoms was successfully employed to create short lived excited state molecules.The formation of ultracold ground state earth alkali molecules has not yet been reported.
Optical Feshbach resonances may provide an alternative way to form molecules in their ground state, provided the atoms are kept in a tight trap such as an optical lattice. We study here the formation of Sr2 ground state molecules by employing an optical Feshbach resonance. We investigate the feasibility of this scheme as a function of the experimental control parameters laser intensity, detuning and trap frequency.