Simple Mean-Field Theory for a Zero-Temperature Fermi Gas at a Feshbach Resonance

Details Simple Mean-Field Theory for a Zero-Temperature Fermi Gas at a Feshbach Resonance Simple Mean-Field Theory for a Zero-Temperature Fermi Gas at a Feshbach Resonance

2005-06-07

arxiv.org/abs/cond-mat/0506183v1

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure, 27+ references; submitted to PRL

Scientific paper

10.1103/PhysRevLett.95.110408

We present a simple two-channel mean field theory for a zero-temperature two-component Fermi gas in the neighborhood of a Feshbach resonance. Our results agree with recent experiments on the bare-molecule fraction as a function of magnetic field [Partridge et al., cond-mat/0505353]. Even in this strongly-coupled gas of Li-6, the experimental results depend on the structure of the molecules formed in the Feshbach resonance and, therefore, are not universal.

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