Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions

Details Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions

2004-05-09

arxiv.org/abs/cond-mat/0405178v1

Phys. Rev. Lett. 93, 130403 (2004) -- figures corrected

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.93.130403

Degenerate Fermi gas interacting with molecules near Feshbach resonance is unstable with respect to formation of a mixed state in which atoms and molecules coexist as a coherent superposition. Theory of this state is developed using a mapping to the Dicke model, treating molecular field in the single mode approximation. The results are accurate in the strong coupling regime relevant for current experimental efforts. The exact solution of the Dicke model is exploited to study stability, phase diagram, and nonadiabatic dynamics of molecular field in the mixed state.

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