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

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063607· OSTI ID:21550152

Yip, S -K ^[1]

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1. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (China)

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).

• OSTI ID: 21550152
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.063607; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BETHE-GOLDSTONE EQUATION
COMPARATIVE EVALUATIONS
COOPER PAIRS
FERMIONS
ORDER PARAMETERS
SU-2 GROUPS
SU-6 GROUPS
SUPERFLUIDITY
TRANSFORMATIONS
DIMENSIONLESS NUMBERS
EQUATIONS
EVALUATION
LIE GROUPS
SU GROUPS
SYMMETRY GROUPS