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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.

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


H.W. Cho

D.J. McCarron

M.P. Koppinger

D.L. Jenkin

K.L. Butler

P.S. Julienne

C.L. Blackley

C.R. Le Sueur


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.


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).

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)


Published Journal Article (630 Kb)

Copyright Statement
© 2013 American Physical Society

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