Feshbach spectroscopy of an ultracold mixture of Rb-85 and Cs-133

Cho, H.W.; McCarron, D.J.; Koppinger, M.P.; Jenkin, D.L.; Butler, K.L.; Julienne, P.S.; Blackley, C.L.; Le Sueur, C.R.; Hutson, J.M.; Cornish, S.L.

Abstract

We report the observation of interspecies Feshbach resonances in an optically trapped mixture of 85Rb and 133Cs. We measure nine resonances in the lowest spin channel for a magnetic field range from 0 to 700 G and show that they are in good agreement with coupled-channel calculations. The interspecies background scattering length is close to zero over a large range of magnetic fields, permitting the sensitive detection of Feshbach resonances through interspecies thermalization. Our results confirm the quality of the Rb-Cs potential curves [ Phys. Rev. A 85 032506 (2012)] and offer promising starting points for the production of ultracold polar molecules.

Citation

Cho, H., McCarron, D., Koppinger, M., Jenkin, D., Butler, K., Julienne, P., …Cornish, S. (2013). Feshbach spectroscopy of an ultracold mixture of Rb-85 and Cs-133. Physical Review A, 87(1), Article 010703(R). https://doi.org/10.1103/physreva.87.010703

• Journal Article Type: Article
• Publication Date: Jan 11, 2013
• Deposit Date: Mar 4, 2013
• Publicly Available Date: Apr 26, 2013
• Journal: Physical Review A
• Print ISSN: 1050-2947
• Electronic ISSN: 1094-1622
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 87
• Issue: 1
• Article Number: 010703(R)
• DOI: https://doi.org/10.1103/physreva.87.010703