Theory of a fermionic superfluid with SU(2) x SU(6) symmetry

被引：15
|
作者：
Yip, S. -K. [1 ]
机构：
[1] Acad Sinica, Inst Phys, Taipei 115, Taiwan
来源：
PHYSICAL REVIEW A | 2011年 / 83卷 / 06期
关键词：
PHASES; MATRIX;
D O I：
10.1103/PhysRevA.83.063607
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study theoretically interspecies Cooper pairing in a fermionic system with SU(2) x SU(6) symmetry. We show that, with suitable unitary transformations, the order parameter for the ground state can be reduced to only two nonvanishing complex components. The ground state has a large degeneracy. We find that while some Goldstone modes have linear dispersion, others are quadratic at low frequencies. We compare our results with the case of SU(N).
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页数：8
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