Fermi-Fermi混合物中的约束诱导Efimov共振
Confinement-induced Efimov resonances in Fermi-Fermi mixtures
摘要：
40 K和6Li的Fermi-Fermi混合物在自由空间中不表现出Efimov效应，但在一维中仅限制40 K就可以诱导Efimov效应。这里的Efimov三体参数是由限制长度控制的。我们表明，在这样一个系统中的稀释极限的三体复合率有一个特征的等效散射长度与标度因子22.0的周期性依赖，并可以表示为相同的玻色子在三维空间中的类似的公式。因此，在1D-3D混合维中，40 K和6Li的超冷混合物是观察费米子中Efimov物理的有希望的候选者。
英文摘要：
A Fermi-Fermi mixture of 40K and 6Li does not exhibit the Efimov effect in a free space, but the Efimov effect can be induced by confining only 40K in one dimension. Here the Efimov's three-body parameter is controlled by the confinement length. We show that the three-body recombination rate in such a system in the dilute limit has a characteristic logarithmic-periodic dependence on the effective scattering length with the scaling factor 22.0 and can be expressed by formulas similar to those for identical bosons in three dimensions. The ultracold mixture of 40K and 6Li in the 1D-3D mixed dimensions is thus a promising candidate to observe the Efimov physics in fermions.
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