Pairing and the spin susceptibility of the polarized unitary Fermi gas in the normal phase
Pairing and the spin susceptibility of the polarized unitary Fermi gas in the normal phase
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DOI：
10.1103/physreva.103.043330
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发表时间：
2021-02
影响因子：
2.9
通讯作者：
Lukas Rammelmüller;Yaqi Hou;J. Drut;J. Braun
中科院分区：
文献类型：
--
作者：
Lukas Rammelmüller;Yaqi Hou;J. Drut;J. Braun
从理论上研究了正相幺正费米气体的配对行为。我们的分析是基于静态自旋磁化率，其特征在于对外部磁场的响应。我们得到这个数量通过复杂的Langevin方法，并比较我们的计算与现有的文献数据中的自旋平衡的情况下。此外，我们目前的结果极化系统，在那里我们补充和扩大我们的分析在高温下与高阶维里膨胀的结果。我们的研究结果的自旋极化酉费米气体的相图的影响进行了讨论，在现有技术的背景下。
We theoretically study the pairing behavior of the unitary Fermi gas in the normal phase. Our analysis is based on the static spin susceptibility, which characterizes the response to an external magnetic field. We obtain this quantity by means of the complex Langevin approach and compare our calculations to available literature data in the spin-balanced case. Furthermore, we present results for polarized systems, where we complement and expand our analysis at high temperature with high-order virial expansion results. The implications of our findings for the phase diagram of the spin-polarized unitary Fermi gas are discussed, in the context of the state of the art.