The Non-universal behaviour of Cold Fermi Condensates with Narrow Feshbach Resonances
arXiv:0810.1796 · doi:10.1103/PhysRevA.80.043621
Abstract
In this paper we construct an effective field theory for a condensate of cold Fermi atoms whose scattering is controlled by a narrow Feshbach resonance. We show how, from first principles, it permits a hydrodynamic description of the BEC-BCS crossover from which the equation of state, intimately related to the speed of sound, can be derived. Specifically, we stress the non-universal behaviour of the equation of state at the unitary limit of infinite scattering length that arises when either, or both, of the range of the inter-atomic force and the scale of the molecular field become large.
7 pages, there is no differences in results between this (v2) and the older version (v1), but v2 makes the nature of the non-canonical behavior of the EOS clearer
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Cited by in corpus (4)
- The role of Causality in Tunable Fermi Gas Condensates
- Spontaneous Vortex Production in Driven Condensates with Narrow Feshbach Resonances
- From Narrow to Broad Feshbach Resonances: Condensate Fraction of Cooper Pairs and Preformed Molecules
- Nonequilibrium Damping of Collective Motion of Homogeneous Cold Fermi Condensates with Feshbach Resonances