K<mml:none/><mml:none/><mml:mprescripts/><mml:none/>40−Rb<mml:none/><mml:none/><mml:mprescripts/><mml:none/>87Feshbach resonances: Modeling the interatomic potential

2007/06/29 by C. Klempt, Carsten Klempt, T. Henninger +5 · 4 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.other

paper · pdf · doi:10.1103/physreva.76.020701

published as Phys. Rev. A 76, 020701(R) (2007) · 4 pages, 3 figures

arxiv created 2007/06/29 · openalex publication_date 2007/08/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have observed 28 heteronuclear Feshbach resonances in ten spin combinations of the hyperfine ground states of a ⁴⁰K\text\ensuremath-⁸⁷Rb mixture. The measurements were performed by observing the loss rates from an atomic mixture at magnetic fields between 0 and 700\phantom\rule0.3em0exG. These data were used to significantly refine an interatomic potential derived from molecular spectroscopy, yielding a highly consistent model of the ⁴⁰K\text\ensuremath-⁸⁷Rb interaction. Thus, the measured resonances can be assigned to the corresponding molecular states. In addition, this potential allows for an accurate calculation of the energy differences between highly excited levels and the rovibrational ground level. This information is of particular relevance for the formation of deeply bound heteronuclear molecules. Finally, the model is used to predict Feshbach resonances in mixtures of ⁸⁷Rb combined with ³⁹K or ⁴¹K.

Citations

• Editorial: Quo vadis, cold molecules?

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