Measurement of the interaction energy near a Feshbach resonance in a /sup 6/Li Fermi gas

T. Bourdel, J. Cubizolles, L. Khaykovich, K.M.F. Magalhaes, S.J.J.M.F. Kokkelmans, G.V. Shlyapnikov, C. Salomon

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    Abstract

    We investigate the strongly interacting regime in an optically trapped Li/sup 6/ Fermi mixture near a Feshbach resonance. The resonance is found at 800(40) G in good agreement with theory. Anisotropic expansion of the gas is interpreted by collisional hydrodynamics. We observe an unexpected and large shift (80 G) between the resonance peak and both the maximum of atom loss and the change of sign of the interaction energy
    Original languageEnglish
    Article number020402
    Pages (from-to)020402-1/4
    JournalPhysical Review Letters
    Volume91
    Issue number2
    DOIs
    Publication statusPublished - 2003

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