In a recent paper [Phys. Rev. A 99, 053617 (2019)], the total number of fermion pairs in a spin-balanced two-component Fermi gas of $^6$Li atoms was experimentally probed in the normal phase above the superfluid critical temperature, in order to investigate the sectors of pseudogap and preformed-pair in the temperature-coupling phase diagram. Here, we present a theoretical account of these experimental results in terms of an ab-initio self-consistent $t$-matrix calculation, which emphasizes the role of the pair-correlation function between opposite-spin fermions at equilibrium. Good agreement is found between the available experimental data and the theoretical results obtained with no adjustable parameter.

中文翻译：

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有吸引力的费米气体正相中的对相关性

在最近的一篇论文 [Phys. Rev. A 99, 053617 (2019)]，在超流体临界温度以上的正相中实验探测了 $^6$Li 原子的自旋平衡双组分费米气体中的费米子对总数，以便研究温度耦合相图中赝隙和预制对的扇区。在这里，我们根据 ab-initio 自洽 $t$-矩阵计算提出了这些实验结果的理论说明，该计算强调了平衡时相反自旋费米子之间的对相关函数的作用。在可用的实验数据和在没有可调参数的情况下获得的理论结果之间发现了良好的一致性。