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.

Abstract

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.

Citation

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. https://doi.org/10.1038/s41567-018-0169-x

• 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
• DOI: https://doi.org/10.1038/s41567-018-0169-x
• Related Public URLs: https://arxiv.org/abs/1710.03093