Heteronuclear molecules in an optical dipole trap

Details Heteronuclear molecules in an optical dipole trap Heteronuclear molecules in an optical dipole trap

2007-12-23

arxiv.org/abs/0712.3889v2

Phys. Rev. A 78, 013416 (2008)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 7 figures

Scientific paper

10.1103/PhysRevA.78.013416

We report on the creation and characterization of heteronuclear KRb Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of K-40 and Rb-87 atoms, we create as many as 25,000 molecules at 300 nK by rf association. Optimizing the association process, we achieve a conversion efficiency of 25%. We measure the temperature dependence of the rf association process and find good agreement with a phenomenological model that has previously been applied to Feshbach molecule creation by slow magnetic-field sweeps. We also present a measurement of the binding energy of the heteronuclear molecules in the vicinity of the Feshbach resonance and provide evidence for Feshbach molecules as deeply bound as 26 MHz.

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