Stability Criteria for Breached-Pair Superfluidity
- 5 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (1) , 017001
- https://doi.org/10.1103/physrevlett.94.017001
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.Keywords
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