We demonstrate and theoretically analyze the dressing of several proximate Feshbach resonances in ⁸⁷Rb using radio-frequency (rf) radiation. We present accurate measurements and characterizations of the resonances, and the dramatic changes in scattering properties that can arise through the rf dressing. Our scattering theory analysis yields quantitative agreement with the experimental data. We also present a simple interpretation of our results in terms of rf-coupled bound states interacting with the collision threshold.
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Kaufman et al. (2009) studied this question.
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