Nature of superfluidity in ultracold Fermi gases near Feshbach resonances

We study the superfluid state of atomic Fermi gases using a BCS-Bose-Einstein-condensation crossover theory. Our approach emphasizes noncondensed fermion pairs which strongly hybridize with their (Feshbach-induced) molecular boson counterparts. These pairs lead to pseudogap effects above T{sub c} an...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-06, Vol.69 (6), Article 063610
Hauptverfasser:	Stajic, Jelena, Milstein, J. N., Chen, Qijin, Chiofalo, M. L., Holland, M. J., Levin, K.
Format:	Artikel
Sprache:	eng
Schlagworte:	ATOMIC AND MOLECULAR PHYSICS BCS THEORY BOSE-EINSTEIN CONDENSATION BOSONS FERMI GAS FERMIONS RESONANCE SUPERFLUIDITY
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Beschreibung
Zusammenfassung:	We study the superfluid state of atomic Fermi gases using a BCS-Bose-Einstein-condensation crossover theory. Our approach emphasizes noncondensed fermion pairs which strongly hybridize with their (Feshbach-induced) molecular boson counterparts. These pairs lead to pseudogap effects above T{sub c} and non-BCS characteristics below. We discuss how these effects influence the experimental signatures of superfluidity.
ISSN:	1050-2947 1094-1622
DOI:	10.1103/PhysRevA.69.063610