Three-body recombination at large scattering lengths in an ultracold atomic gas

Abstract

We study three-body recombination in an optically trapped ultracold gas of cesium atoms with precise magnetic control of the s-wave scattering length a. At large positive values of a, we measure the dependence of the rate coefficient on a and confirm the theoretically predicted scaling proportional to a^4. Evidence of recombination heating indicates the formation of very weakly bound molecules in the last bound energy level.

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• Strongly enhanced inelastic collisions in a Bose-Einstein condensate near Feshbach resonances
• Three-body recombination of ultra-cold atoms to a weakly bound $s$ level
• Three-body recombination in Bose gases with large scattering length
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• Magnetic Field Dependence of Ultracold Inelastic Collisions near a Feshbach Resonance

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