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Observation of interspecies Feshbach resonances in an ultracold 39K-133Cs mixture and refinement of interaction potentials

Gröbner, M.; Weinmann, P.; Kirilov, E.; Nägerl, H.-C.; Julienne, P.S.; Le Sueur, C.R.; Hutson, J.M.

Observation of interspecies Feshbach resonances in an ultracold 39K-133Cs mixture and refinement of interaction potentials Thumbnail


Authors

M. Gröbner

P. Weinmann

E. Kirilov

H.-C. Nägerl

P.S. Julienne

C.R. Le Sueur



Abstract

We observe interspecies Feshbach resonances due to s-wave bound states in ultracold 39K -133Cs scattering for three different spin mixtures. The resonances are observed as joint atom loss and heating of the K sample. We perform least-squares fits to obtain improved K-Cs interaction potentials that reproduce the observed resonances, and carry out coupled-channel calculations to characterize the scattering and bound-state properties for 39K-Cs, 40K-Cs, and 41K-Cs. Our results open up the possibilities of tuning interactions in K-Cs atomic mixtures and of producing ultracold KCs molecules.

Citation

Gröbner, M., Weinmann, P., Kirilov, E., Nägerl, H., Julienne, P., Le Sueur, C., & Hutson, J. (2017). Observation of interspecies Feshbach resonances in an ultracold 39K-133Cs mixture and refinement of interaction potentials. Physical Review A, 95(2), Article 022715. https://doi.org/10.1103/physreva.95.022715

Journal Article Type Article
Acceptance Date Feb 7, 2017
Online Publication Date Feb 28, 2017
Publication Date Feb 28, 2017
Deposit Date Mar 1, 2017
Publicly Available Date Mar 28, 2024
Journal Physical Review A
Print ISSN 2469-9926
Electronic ISSN 2469-9934
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 95
Issue 2
Article Number 022715
DOI https://doi.org/10.1103/physreva.95.022715

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Copyright Statement
Reprinted with permission from the American Physical Society: Physical Review A 95, 022715 © (2017) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.




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