Radio-frequency dressing of multiple Feshbach resonances

TL;DR

This paper demonstrates and analyzes how radio-frequency radiation can be used to manipulate multiple Feshbach resonances in Rb-87, providing both experimental measurements and theoretical understanding of the scattering property modifications.

Contribution

It introduces a method for rf dressing of multiple Feshbach resonances in Rb-87, with detailed experimental characterization and a theoretical model explaining the observed effects.

Findings

Accurate measurement of multiple Feshbach resonances in Rb-87

Demonstration of dramatic scattering property changes via rf dressing

Quantitative agreement between theory and experiment

Abstract

We demonstrate and theoretically analyze the dressing of several proximate Feshbach resonances in Rb-87 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.