Scientific Results

Feshbach resonances in the Li-6-K-40 Fermi-Fermi mixture: elastic versus inelastic interactions

Year: 2011

Authors: Naik D., Trenkwalder A., Kohstall C., Spiegelhalder F. M., Zaccanti M., Hendl G., Schreck F., Grimm R., Hanna T. M., Julienne P. S.

Autors Affiliation: Austrian Acad Sci, Inst Quantenopt & Quanteninformat, A-6020 Innsbruck, Austria;
Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria;
Univ Florence, Dept Phys, LENS, I-50019 Sesto Fiorentino, Italy;
INO CNR, I-50019 Sesto Fiorentino, Italy;
NIST, Joint Quantum Inst, Gaithersburg, MD 20899 USA;
USA Univ Maryland, Gaithersburg, MD 20899 USA

Abstract: We present a detailed theoretical and experimental study of Feshbach resonances in the Li-6-K-40 mixture. Particular attention is given to the inelastic scattering properties, which have not been considered before. As an important example, we thoroughly investigate both elastic and inelastic scattering properties of a resonance that occurs near 155 G. Our theoretical predictions based on a coupled channels calculation are found in excellent agreement with the experimental results. We also present theoretical results on the molecular state that underlies the 155 G resonance, in particular concerning its lifetime against spontaneous dissociation. We then present a survey of resonances in the system, fully characterizing the corresponding elastic and inelastic scattering properties. This provides the essential information to identify optimum resonances for applications relying on interaction control in this Fermi-Fermi mixture.

Journal/Review: EUROPEAN PHYSICAL JOURNAL D

Volume: 65 (1-2)      Pages from: 55  to: 65

More Information: We thank Bo Gao for stimulating discussions. We acknowledge support by the Austrian Science Fund (FWF) and the European Science Foundation (ESF) within the EuroQUAM/FerMix project and support by the FWF through the SFB FoQuS. T.M.H. and P.S.J. acknowledge support from an AFOSR MURI on Ultracold Molecules.
KeyWords: Bose-Einstein condensation; Scattering length; Molecules; Gases; Collisions; Atoms; Oscillations
DOI: 10.1140/epjd/e2010-10591-2

Citations: 24
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English