通过使费米气体在幺正性下旋转来破坏超流性
Destroying superfluidity by rotating a Fermi gas at unitarity
摘要：
在不形成涡旋的假设下，我们研究了旋转对零温下简谐囚禁的费米气体的影响。我们表明，在幺正性的旋转产生一个非旋转的超流（S）的核心和刚性旋转的正常（N）的气体之间的相分离。两相之间的界面的特征在于密度不连续性$n_{\rm N}/n_{\rm S}= 0.85$，与角速度无关。计算了超流的损耗和旋转位形的角动量随角速度的变化。稳定性的条件也进行了讨论，临界角速度的发病自发四极形变的接口进行了评估。
英文摘要：
We study the effect of the rotation on a harmonically trapped Fermi gas at zero temperature under the assumption that vortices are not formed. We show that at unitarity the rotation produces a phase separation between a non rotating superfluid (S) core and a rigidly rotating normal (N) gas. The interface between the two phases is characterized by a density discontinuity $n_{\rm N}/n_{\rm S}= 0.85$, independent of the angular velocity. The depletion of the superfluid and the angular momentum of the rotating configuration are calculated as a function of the angular velocity. The conditions of stability are also discussed and the critical angular velocity for the onset of a spontaneous quadrupole deformation of the interface is evaluated.
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