The Nature of Superfluidity in Ultracold Fermi Gases Near Feshbach Resonances

Abstract

We study the superfluid state of atomic Fermi gases using a BCS-BEC crossover theory. Our approach emphasizes non-condensed fermion pairs which strongly hybridize with their (Feshbach-induced) molecular boson counterparts. These pairs lead to pseudogap effects above $T_c$ and non-BCS characteristics below. We discuss how these effects influence the experimental signatures of superfluidity.

4 pages, 3 figures, submitted to PRA Rapid Communications; introduction rewritten, figure replaced

References in corpus (3)

• Observation of Bose-Einstein Condensation of Molecules
• Superfluidity and collective modes in a uniform gas of Fermi atoms with a Feshbach resonance
• The pseudogap state in superconductors: Extended Hartree approach to time-dependent Ginzburg-Landau Theory

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