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BEC-BCS crossover in an optical lattice

By A.O. Koetsier, D.B.M. Dickerscheid and H.T.C. Stoof


We present the microscopic theory for the BEC-BCS crossover of an atomic Fermi gas in an optical lattice,\ud showing that the Feshbach resonance underlying the crossover in principle induces strong multiband effects.\ud Nevertheless, the BEC-BCS crossover itself can be described by a single-band model since it occurs at\ud magnetic fields that are relatively far away from the Feshbach resonance. A criterion is proposed for the latter,\ud which is obeyed by most known Feshbach resonances in ultracold atomic gases

Topics: Natuur- en Sterrenkunde
Year: 2006
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