Stability Criteria for Breached Pair Superfluidity

Abstract

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.

5 pages, REVTeX4. Minor updates in response to comments. References added

References in corpus (10)

• Interior Gap Superfluidity
• Phase separation in asymmetrical fermion superfluids
• Gapless two-flavor color superconductor
• Gapless Color-Flavor-Locked Quark Matter
• Chromomagnetic instability in dense quark matter
• Breached pairing superfluidity: Possible realization in QCD
• Cold asymmetrical fermion superfluids
• Spin-Dependent Hubbard Model and a Quantum Phase Transition in Cold Atoms
• Superfluidity in the interior-gap states
• Gapless Color Superconductivity

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