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Observation of Feshbach resonances between alkali and closed-shell atoms

Barbé, V.; Ciamei, A.; Pasquiou, B.; Reichsöllner, L.; Schreck, F.; Żuchowski, P.S.; Hutson, J.M.

Observation of Feshbach resonances between alkali and closed-shell atoms Thumbnail


V. Barbé

A. Ciamei

B. Pasquiou

L. Reichsöllner

F. Schreck

P.S. Żuchowski


Magnetic Feshbach resonances allow control of the interactions between ultracold atoms1. They are an invaluable tool in studies of few-body and many-body physics2,3, and can be used to convert pairs of atoms into molecules4,5 by ramping an applied magnetic field across a resonance. Molecules formed from pairs of alkali atoms have been transferred to low-lying states, producing dipolar quantum gases6. There is great interest in making molecules formed from an alkali atom and a closed-shell atom such as ground-state Sr or Yb. Such molecules have both a strong electric dipole and an electron spin; they will open up new possibilities for designing quantum many-body systems7,8, and for tests of fundamental symmetries9. The crucial first step is to observe Feshbach resonances in the corresponding atomic mixtures. Very narrow resonances have been predicted theoretically10,11,12, but until now have eluded observation. Here we present the observation of magnetic Feshbach resonances of this type, for an alkali atom, Rb, interacting with ground-state Sr.


Barbé, V., Ciamei, A., Pasquiou, B., Reichsöllner, L., Schreck, F., Żuchowski, P., & Hutson, J. (2018). Observation of Feshbach resonances between alkali and closed-shell atoms. Nature Physics, 14, 881-884.

Journal Article Type Article
Acceptance Date May 9, 2018
Online Publication Date Jun 11, 2018
Publication Date Jun 11, 2018
Deposit Date May 21, 2018
Publicly Available Date Dec 11, 2018
Journal Nature Physics
Print ISSN 1745-2473
Electronic ISSN 1745-2481
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 14
Pages 881-884
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