All-optical production of a degenerate mixture of Li-6 and K-40 and creation of heteronuclear molecules

Year: 2010

Authors: Spiegelhalder F.M., Trenkwalder A., Naik D., Kerner G., Wille E., Hendl G., Schreck F., Grimm R.

Autors Affiliation: Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, A-6020 Innsbruck, Austria;
Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, 6020 Innsbruck, Austria

Abstract: We present the essential experimental steps of our all-optical approach to prepare a double-degenerate Fermi-Fermi mixture of Li-6 and K-40 atoms, which then serves as a starting point for molecule formation. We first describe the optimized trap loading procedures, the internal-state preparation of the sample, and the combined evaporative and sympathetic cooling process. We then discuss the preparation of the sample near an interspecies Feshbach resonance, and we demonstrate the formation of heteronuclear molecules by a magnetic field ramp across the resonance.


Volume: 81 (4)      Pages from: 043637  to: 043637

More Information: We thank Paul Julienne for fruitful discussions and support on the theoretical understanding of the interspecies scattering properties, Tobias Tiecke for the calculated Feshbach resonance positions displayed in Fig. 6, Christoph Kohstall for useful comments on the manuscript, and Clarice Aiello for contributions to the experimental setup. This work is supported by the Austrian Science Fund (FWF) and the European Science Foundation (ESF) within the EuroQUAM/FerMix project and by the FWF through the SFB FoQuS.
KeyWords: All-optical; Feshbach resonances; Heteronuclear molecules; Molecule formation; State preparation; Sympathetic cooling; Trap loading, Fermions; Magnetic fields; Resonance, Molecules
DOI: 10.1103/PhysRevA.81.043637

Citations: 48
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