Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-11-21
Phys. Rev. Lett. 103 (2009) 073202
Physics
Condensed Matter
Other Condensed Matter
4 pages, 4 figures, agrees with published version
Scientific paper
The 3-body recombination rate at threshold for distinguishable atoms with large negative pair scattering lengths is calculated in the zero-range approximation. The only parameters in this limit are the 3 scattering lengths and the Efimov parameter, which can be complex valued. We provide semi-analytic expressions for the cases of 2 or 3 equal scattering lengths and we obtain numerical results for the general case of 3 different scattering lengths. Our general result is applied to the three lowest hyperfine states of Lithium-6 atoms. Comparisons with recent experiments provide indications of loss features associated with Efimov trimers near the 3-atom threshold.
Braaten Eric
Hammer Hans-Werner
Kang Daekyoung
Platter Lucas
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