Improved characterization of Feshbach resonances and interaction potentials between 23Na and 87Rb atoms

Guo, Zhichao; Jia, Fan; Zhu, Bing; Li, Lintao; Hutson, Jeremy M.; Wang, Dajun

doi:10.1103/physreva.105.023313

Improved characterization of Feshbach resonances and interaction potentials between 23Na and 87Rb atoms

Guo, Zhichao; Jia, Fan; Zhu, Bing; Li, Lintao; Hutson, Jeremy M.; Wang, Dajun

Authors

Zhichao Guo

Fan Jia

Bing Zhu

Lintao Li

Professor Jeremy Hutson j.m.hutson@durham.ac.uk
Professor

Dajun Wang

Abstract

The ultracold mixture of 23Na and 87Rb atoms has become an important system for investigating physics in Bose-Bose atomic mixtures and for forming ultracold ground-state polar molecules. In this work, we provide an improved characterization of the most commonly used Feshbach resonance near 347.64 G between 23Na and 87Rb in their absolute ground states. We form Feshbach molecules using this resonance and measure their binding energies by dissociating them via magnetic-field modulation. We use the binding energies to refine the singlet and triplet potential-energy curves, using coupled-channel bound-state calculations. We then use coupled-channel scattering calculations on the resulting potentials to produce a high-precision mapping between magnetic field and scattering length. We also observe ten additional s-wave Feshbach resonances for 23Na and 87Rb in different combinations of Zeeman sublevels of the F = 1 hyperfine states. Some of the resonances show two-body inelastic decay due to spin exchange. We compare the resonance properties with coupled-channel scattering calculations that full take account of inelastic properties.

Citation

Guo, Z., Jia, F., Zhu, B., Li, L., Hutson, J. M., & Wang, D. (2022). Improved characterization of Feshbach resonances and interaction potentials between 23Na and 87Rb atoms. Physical Review A, 105(2), Article 023313. https://doi.org/10.1103/physreva.105.023313

Journal Article Type	Article
Acceptance Date	Jan 18, 2022
Online Publication Date	Feb 11, 2022
Publication Date	2022-02
Deposit Date	Feb 12, 2022
Publicly Available Date	Jun 14, 2022
Journal	Physical Review A
Print ISSN	2469-9926
Electronic ISSN	2469-9934
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	105
Issue	2
Article Number	023313
DOI	https://doi.org/10.1103/physreva.105.023313
Related Public URLs	https://arxiv.org/abs/2108.01856

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Copyright Statement
Reprinted with permission from the American Physical Society: Guo, Zhichao, Jia, Fan, Zhu, Bing, Li, Lintao, Hutson, Jeremy M. & Wang, Dajun (2022). Improved characterization of Feshbach resonances and interaction potentials between 23Na and 87Rb atoms. Physical Review A 105(2): 023313. © (2022) 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.