Frankfurt 2006 – scientific programme
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Q: Quantenoptik und Photonik
Q 21: Ultrakalte Moleküle
Q 21.4: Talk
Tuesday, March 14, 2006, 11:25–11:40, HII
Long-lived Feshbach molecules in an optical lattice — •Klaus Winkler1, Gregor Thalhammer1, Florian Lang1, Stefan Schmid1, Rudolf Grimm1,2, and Johannes Hecker Denschlag1 — 1Institut für Experimentalphysik, Innsbruck, Austria — 2Institut für Quantenoptik und Quanteninformation, Innsbruck, Austria
We have investigated production and lifetime of Rb2 Feshbach molecules in an optical lattice. Compared to previous experiments without lattice we find dramatic improvements. We observe long molecular lifetimes of up to 700ms and near unit conversion efficiency of atom pairs into molecules (and vice versa) when ramping slowly across the Feshbach resonance. We also have developed a purification scheme based on a combination of both a radio-frequency and an optical transition which removes residual atoms from the lattice. Purification results in a pure molecular sample where individual lattice sites are either empty or occupied by a single molecule.