Efficient creation of molecules from a cesium Bose-Einstein condensate

Details Efficient creation of molecules from a cesium Bose-Einstein condensate Efficient creation of molecules from a cesium Bose-Einstein condensate

2004-09-29

arxiv.org/abs/cond-mat/0409737v1

Europhys. Lett. 69, 706 (2005)

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 4 figures, submitted to Europhysics Letters

Scientific paper

10.1209/epl/i2004-10427-7

We report a new scheme to create weakly bound Cs$_2$ molecules from an atomic Bose-Einstein condensate. The method is based on switching the magnetic field to a narrow Feshbach resonance and yields a high atom-molecule conversion efficiency of more than 30%, a factor of three higher than obtained with conventional magnetic-field ramps. The Cs$_2$ molecules are created in a single $g$-wave rotational quantum state. The observed dependence of the conversion efficiency on the magnetic field and atom density shows scattering processes beyond two-body coupling to occur in the vicinity of the Feshbach resonance.

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