Resonance theory of the crossover from Bardeen-Cooper-Schrieffer superfluidity to Bose-Einstein condensation in a dilute Fermi gas

J.N. Milstein, S.J.J.M.F. Kokkelmans, M.J. Holland

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    Abstract

    We present a description of the behavior of a superfluid gas of fermions in the presence of a Feshbach resonance over the complete range of magnetic field detunings. Starting from a resonance Hamiltonian, we exploit a functional method to describe the continuous behavior from Bardeen-Cooper-Schrieffer to Bose-Einstein condensation type superfluidity. Our results show an ability for a resonance system to exhibit a high critical temperature comparable to the Fermi temperature. The results are derived in a manner that is shown to be consistent with the underlying microscopic scattering physics
    Original languageEnglish
    Article number043604
    Pages (from-to)043604-1/6
    JournalPhysical Review A : Atomic, Molecular and Optical Physics
    Volume66
    Issue number4
    DOIs
    Publication statusPublished - 2002

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