Formation of molecules from a Cs Bose-Einstein condensate

Abstract

Conversion of an expanding Bose-Einstein condensate of Cs atoms to a molecular one with an efficiency of more than 30% was observed recently in experiments by M. Mark et al., Europhys. Lett. 69, 706 (2005). The theory presented here describes the experimental results. Values of resonance strength of 8 mG and rate coefficients for atom-molecule deactivation of $1\times 10^{-11}$ cm${}^3/$s and molecule-molecule one of $1.5\times 10^{-9}$ cm${}^3/$s are estimated by a fit of the theoretical results to the experimental data. Near the resonance, where the highest conversion efficiency was observed, the results demonstrate strong sensitivity to the magnetic field ripple and inhomogeneity. A conversion efficiency of about 60% is predicted by non-mean-field calculations for the densities and sweep rates lower than the ones used in the experiments.

9 pages, 10 figures

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Cited by in corpus (8)

• Production of cold molecules via magnetically tunable Feshbach resonances
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• Control of Ultra-cold Inelastic Collisions by Feshbash Resonances and Quasi-One-Dimensional Confinement
• Rosen-Zener model in cold molecule formation
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• Investigation of 3D-Quantized Ring Vortices in Rotating Coupled Atom-Molecular BEC
• Optimal conversion of Bose condensed atoms into molecules via a Feshbach resonance