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arXiv 1108.4263cond-mat.quant-gascond-mat.str-elcond-mat.supr-con
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各向异性自旋轨道耦合费米气体的量子相位

Quantum phases of atomic Fermi gases with anisotropic spin-orbit coupling

M. Iskin, A. L. Subasi

摘要:

本文考虑一般各向异性自旋轨道耦合(SOC),分析了平衡和非平衡费米气体在整个BCS-玻色-爱因斯坦凝聚体(BEC)演化过程中的相图。在第一部分中,我们使用自洽的平均场论在零温度下,并显示的拓扑结构的基态相图是相当强大的各向异性的影响。在第二部分中,我们超越了平均场的描述,研究了高斯涨落在临界温度附近的影响。这使我们能够推导出含时的金兹伯格-朗道理论,从中我们提取的有效质量的库珀对和它们的临界凝聚温度在分子BEC极限。

英文摘要:

We consider a general anisotropic spin-orbit coupling (SOC) and analyze the phase diagrams of both balanced and imbalanced Fermi gases for the entire BCS--Bose-Einstein condensate (BEC) evolution. In the first part, we use the self-consistent mean-field theory at zero temperature, and show that the topological structure of the ground-state phase diagrams is quite robust against the effects of anisotropy. In the second part, we go beyond the mean-field description, and investigate the effects of Gaussian fluctuations near the critical temperature. This allows us to derive the time-dependent Ginzburg-Landau theory, from which we extract the effective mass of the Cooper pairs and their critical condensation temperature in the molecular BEC limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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