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Phys. Rev. A 71, 063614 (2005) [4 pages]

Atom-molecule theory of broad Feshbach resonances

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G. M. Falco and H. T. C. Stoof
Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands

Received 17 February 2005; published 27 June 2005

We derive the atom-molecule theory for an atomic gas near a broad Feshbach resonance, where the energy dependence of the atom-molecule coupling becomes crucial for understanding experimental results. We show how our many-body theory incorporates the two-atom physics exactly. In particular, we calculate the magnetic moment of a two-component gas of 6Li atoms for a wide range of magnetic fields near the broad Feshbach resonance at about 834  G . We find excellent agreement with the experiment of Jochim et al. [Phys. Rev. Lett. 91, 240402 (2003)].


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.71.063614
DOI: 10.1103/PhysRevA.71.063614
PACS: 03.75.−b, 39.25.+k, 67.40.−w

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