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Phys. Rev. Lett. 100, 053201 (2008) [4 pages]

Exploring an Ultracold Fermi-Fermi Mixture: Interspecies Feshbach Resonances and Scattering Properties of 6Li and 40K

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E. Wille1,2, F. M. Spiegelhalder1, G. Kerner1, D. Naik1, A. Trenkwalder1, G. Hendl1, F. Schreck1, R. Grimm1,2, T. G. Tiecke3, J. T. M. Walraven3, S. J. J. M. F. Kokkelmans4, E. Tiesinga5, and P. S. Julienne5
1Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
2Institut für Experimentalphysik und Forschungszentrum für Quantenphysik, Universität Innsbruck, 6020 Innsbruck, Austria
3Van der Waals-Zeeman Institute, University of Amsterdam, 1018 XE, The Netherlands
4Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
5Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland 20899-8423, USA

Received 19 November 2007; published 5 February 2008

We report on the observation of Feshbach resonances in an ultracold mixture of two fermionic species, 6Li and 40K. The experimental data are interpreted using a simple asymptotic bound state model and full coupled channels calculations. This unambiguously assigns the observed resonances in terms of various s- and p-wave molecular states and fully characterizes the ground-state scattering properties in any combination of spin states.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.053201
DOI:
10.1103/PhysRevLett.100.053201
PACS:
34.50.−s, 05.30.Fk, 67.85.−d
 
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