We present a nonequilibrium kinetic theory describing atom-molecule
population dynamics in a two-component Fermi gas with a Feshbach resonance. Key
collision integrals emerge that govern the relaxation of the atom-molecule
mixture to chemical and thermal equilibrium. Our focus is on the pseudogap
regime where molecules form above the superfluid transition temperature. In
this regime, we formulate a simple model for the atom-molecule population
dynamics. The model predicts the saturation of molecule formation that has been
observed in recent experiments, and indicates that a dramatic enhancement of
the atom-molecule conversion efficiency occurs at low temperatures.Comment: Updated manuscript on July 5, 2004. Four pages with three embedded
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