锂-6原子在大负散射能级下的三体反应
Three-body Recombination of Lithium-6 Atoms with Large Negative Scattering Lengths
摘要：
在零程近似下计算了具有大负对散射长度的可分辨原子的阈值三体复合率。在此极限中的唯一参数是3个散射长度和Efimov参数，其可以是复值。我们提供了半解析表达式的情况下，2或3个相等的散射长度，我们得到的数值结果的一般情况下，3个不同的散射长度。我们的一般结果适用于锂-6原子的三个最低超精细态。与最近的实验比较提供了与Efimov三聚体附近的3-原子阈值的损失功能的迹象。
英文摘要：
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.
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