Three-body recombination rates near a Feshbach resonance within a two-channel contact interaction model

Details Three-body recombination rates near a Feshbach resonance within a two-channel contact interaction model Three-body recombination rates near a Feshbach resonance within a two-channel contact interaction model

2011-12-21

arxiv.org/abs/1112.4962v3

Few-Body Systems, 2012

Physics

Atomic Physics

9 pages, 7 figures

Scientific paper

10.1007/s00601-012-0312-7

We calculate the three-body recombination rate into a shallow dimer in a gas of cold bosonic atoms near a Feshbach resonance using a two-channel contact interaction model. The two-channel model naturally describes the variation of the scattering length through the Feshbach resonance and has a finite effective range. We confront the theory with the available experimental data and show that the two-channel model is able to quantitatively describe the existing data. The finite effective range leads to a reduction of the scaling factor between the recombination minima from the universal value of 22.7. The reduction is larger for larger effective ranges or, correspondingly, for narrower Feshbach resonances.

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