BCS-BEC Crossover in a Gas of Fermi Atoms with a Feshbach Resonance

Y. Ohashi, A. Griffin

研究成果: Article査読

448 被引用数 (Scopus)

抄録

We discuss the BCS-BEC crossover in a degenerate Fermi gas of two hyperfine states interacting close to a Feshbach resonance. We show that, by including fluctuation contributions to the free energy similar to that considered by Nozières and Schmitt-Rink, the character of the superfluid phase transition continuously changes from the BCS-type to the BEC-type, as the threshold of the quasimolecular band is lowered. In the BEC regime, the superfluid phase transition is interpreted in terms of molecules associated with both the Feshbach resonance and Cooper pairing.

本文言語English
ジャーナルPhysical review letters
89
13
DOI
出版ステータスPublished - 2002
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学一般

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