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Observation of interspecies 6Li-133Cs Feshbach resonances

M. Repp, R. Pires, J. Ulmanis, R. Heck, E. D. Kuhnle, M. Weidemüller, and E. Tiemann
Phys. Rev. A 87, 010701(R) – Published 3 January 2013

Abstract

We report on the observation of 19 interspecies Feshbach resonances in an optically trapped ultracold Bose-Fermi mixture of 133Cs and 6Li in the two energetically lowest spin states. We assign the resonances to s- and p-wave molecular channels by a coupled-channels calculation, resulting in an accurate determination of LiCs ground-state potentials. Fits of the resonance position based on the undressed asymptotic bound state model do not provide the same level of accuracy as the coupled-channels calculation. Several broad s-wave resonances provide prospects to create fermionic LiCs molecules with a large dipole moment via Feshbach association followed by stimulated Raman passage. Two of the s-wave resonances overlap with a zero crossing of the Cs scattering length, which offers prospects for the investigation of polarons in an ultracold Li-Cs mixture.

  • Figure
  • Received 8 November 2012

DOI:https://doi.org/10.1103/PhysRevA.87.010701

©2013 American Physical Society

Authors & Affiliations

M. Repp, R. Pires, J. Ulmanis, R. Heck, E. D. Kuhnle, and M. Weidemüller*

  • Physikalisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

E. Tiemann

  • Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany

  • *weidemueller@uni-heidelberg.de

See Also

Ultracold mixtures of atomic 6Li and 133Cs with tunable interactions

Shih-Kuang Tung, Colin Parker, Jacob Johansen, Cheng Chin, Yujun Wang, and Paul S. Julienne
Phys. Rev. A 87, 010702(R) (2013)

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Vol. 87, Iss. 1 — January 2013

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