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arXiv 0911.0984cond-mat.othercond-mat.quant-gascond-mat.stat-mech
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具有布居不平衡的二维囚禁费米气体

Trapped Two-Dimensional Fermi Gases with Population Imbalance

Bert Van Schaeybroeck, Achilleas Lazarides, Serghei Klimin, Jacques Tempere

摘要:

本文研究了零温准二维受限下的布居不平衡费米混合物。利用平均场论和局域密度近似,我们研究了BEC-BCS交叉过程中的基态组态。我们发现被捕获的系统要么是完全正常的,要么是由一个被正常壳包围的超流核组成的,正常壳本身是完全或部分极化的。在改变陷阱不平衡时,陷阱配置可经历不同基态之间的连续转变。最后,我们认为,整个陷阱的热平衡将大大减缓在低温时,超流相的存在。

英文摘要:

We study population imbalanced Fermi mixtures under quasi-two-dimensional confinement at zero temperature. Using mean-field theory and the local-density approximation, we study the ground state configuration throughout the BEC-BCS crossover. We find the trapped system to be either fully normal or to consist of a superfluid core surrounded by a normal shell, which is itself either fully or partially polarized. Upon changing the trap imbalance, the trap configuration may undergo continuous transitions between the different ground states. Finally, we argue that thermal equilibration throughout the trap will be considerably slowed down at low temperatures when a superfluid phase is present.

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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