Analytic Expression for Three-Body Recombination Rates into Deep Dimers

作者：Fedorov D V^*; Mikkelsen M; Jensen A S; Zinner N T

来源：Few-Body Systems, 2015, 56(11-12): 889-896.

DOI：10.1007/s00601-015-1005-9

We investigate three-body recombination rates into deep dimers in cold atomic gases with large scattering length within hyper-spherical adiabatic zero-range approach. We derive closed analytic expressions for the rates for one- and two-species gases. Although the deep dimers are beyond the zero-range theory the latter can still describe the recombination into deep dimers by use of one additional short-range absorption parameter. The recombination rate, as function of the scattering length, retains the known universal behavior-the fourth power trend with characteristic log-periodic peaks-however increasing the short-range absorption broadens the peaks until they are eventually completely smeared out. Increasing the heavy-to-light mass ratio in a two-species system with two identical bosons and a third particle decreases the distance between the peaks and increases the overall scale of the recombination rate.

• 出版日期2015-12