Tree-body loss of of trapped ultracold ${}^{87}$Rb atoms due to a Feshbach resonance

Abstract

The loss of ultracold trapped atoms in the vicinity of a Feshbach resonance is treated as a two-stage reaction, using the Breit-Wigner theory. The first stage is the formation of a resonant diatomic molecule, and the second one is its deactivation by inelastic collisions with other atoms. This model is applied to the analysis of recent experiments on ${}^{87}$Rb, leading to an estimated value of $7\times 10^{-11}$ cm${}^3/$s for the deactivation rate coefficient.

arXiv commentLaTeX, 4 pages with 1 figures, uses REVTeX4, uses improved experimental data

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