Phys. Rev. Lett. 95, 110408 (2005) [4 pages]Simple Mean-Field Theory for a Zero-Temperature Fermionic Gas at a Feshbach ResonanceReceived 6 June 2005; published 9 September 2005 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. Phys. Rev. Lett. 95 020404 (2005)]. Even in this strongly coupled gas of 6Li, the experimental results depend on the structure of the molecules formed in the Feshbach resonance and, therefore, are not universal. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.110408
DOI:
10.1103/PhysRevLett.95.110408
PACS:
03.75.Ss, 03.65.Sq, 05.30.Fk
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