Creating Feshbach resonances for ultracold molecule formation with radiofrequency fields

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.

arXiv commentFinal version. 5 pages, 3 figures

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Cited by in corpus (12)

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• Microwave shielding of ultracold polar molecules
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• Effective Control of Cold Collisions with Radio Frequency Fields
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• Quenched Magneto-association of Ultracold Feshbach Molecules
• Understanding Floquet Resonances in Ultracold Gas Scattering
• Exploring the thermodynamics of spin-1 ${}^{87}$Rb Bose Gases with synthetic magnetization
• Observation of modulation-induced Feshbach resonance