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arXiv · 1606.09441

Creating Feshbach resonances for ultracold molecule formation with radiofrequency fields

Daniel J. Owens·Ting Xie·Jeremy M. Hutson
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Abstract

We show that radiofrequency (RF) radiation may be used to create Feshbach resonances in ultracold gases of alkali-metal atoms at desired magnetic fields that are convenient for atomic cooling and degeneracy. For the case of $^{39}$K+$^{133}$Cs, where there are no RF-free resonances in regions where Cs may be cooled to degeneracy, we show that a resonance may be created near 21~G with 69.2~MHz RF radiation. This resonance is almost lossless with circularly polarized RF, and the molecules created are long-lived even with plane-polarized RF.

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Daniel J. Owens, Ting Xie, Jeremy M. Hutson. 2016-06-30. Creating Feshbach resonances for ultracold molecule formation with radiofrequency fields. https://doi.org/10.1103/physreva.94.023619

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