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

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Vol. 65; no. 1-2; pp. 55 - 65
• Main Authors: Naik, D, Trenkwalder, A, Kohstall, C, Spiegelhalder, F M, Zaccanti, M, Hendl, G, Schreck, F, Grimm, R, Hanna, T M, Julienne, P S
• Format: Journal Article
• Language: English
• Published: 01.11.2011
• Subjects: Channels; Elastic constants; Elastic scattering; Inelastic scattering; Mathematical analysis; Optimization; Spontaneous
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/e2010-10591-2

We present a detailed theoretical and experimental study of Feshbach resonances in the super(6)Li- super(40)K 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 155G. 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 155G 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.