Phys. Rev. Lett. 94, 017001 (2005) [4 pages]Stability Criteria for Breached-Pair Superfluidity
See accompanying Physics Focus We present simple, concrete, two-fermion models that exhibit thermodynamically stable isotropic translationally invariant gapless superfluid states (breached-pair superfluidity). The mass ratio between the components and the momentum structure of the interaction are crucial for determining the stability of such states: Idealized, momentum-independent (“contact”) interactions are insufficient. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.017001
DOI:
10.1103/PhysRevLett.94.017001
PACS:
74.20.Mn, 64.10.+h, 71.27.+a, 74.25.Dw
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