Feshbach resonance in dense ultracold Fermi gases.
We propose a coherent framework allowing one to treat many-body effects in dense ultracold Fermi gases in the presence of a Feshbach resonance. We show that the simple effect of Pauli exclusion induces a strong modification of the basic scattering properties. In particular, this washes out the Feshbach resonance and provides a natural explanation for recent experimental findings.
Combescot
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Laboratoire de Physique Statistique, Ecole Normale Supérieure, Centre National de la Recherche Scientifique, Université Paris 6 et Paris 7, 24 rue Lhomond, 75231 Paris Cedex 05, France.