Phase slip in a superfluid Fermi gas near a Feshbach resonance

被引：5

作者：

Yin, L ^{[1
]}

Ao, P

机构：

[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[2] Univ Washington, Dept Mech Engn, Seattle, WA 98195 USA

[3] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.71.041603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the properties of a phase slip in a superfluid Fermi gas near a Feshbach resonance. The phase slip can be generated by the phase imprinting method. Below the superfluid transition temperature, it appears as a dip in the density profile and becomes more pronounced when the temperature is lowered. Therefore the phase slip can provide direct evidence of the superfluid state. The condensation energy of the superfluid state can be extracted from the density profile of the phase slip, due to the unitary properties of the Fermi gas near the resonance. The width of the phase slip is inversely proportional to the square root of the difference between the transition temperature and the temperature. The signature of the phase slip in the density profile becomes more robust across the BCS-Bose-Einstein-condensate crossover.

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页数：4

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