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    Spin Drag in Ultracold Fermi Mixtures with Repulsive Interactions

    Duine, R. A.
    Polini, Marco
    Raoux, Arnaud
    Stoof, H. T. C.
    Vignale, Giovanni, 1957-
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    [PDF] Article (454.9Kb)
    Date
    2010
    Format
    Article
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    Abstract
    We calculate the spin-drag relaxation rate for a two-component ultracold atomic Fermi gas with positive scattering length between the two spin components. In one dimension we find that it vanishes linearly with temperature. In three dimensions the spin-drag relaxation rate vanishes quadratically with temperature for sufficiently weak interactions. This quadratic temperature dependence is present, up to logarithmic corrections, in the two- dimensional case as well. For stronger interaction the system exhibits a Stoner ferromagnetic phase transition in two and three dimensions. We show that the spin-drag relaxation rate is enhanced by spin fluctuations as the temperature approaches the critical temperature of this transition from above.
    URI
    http://hdl.handle.net/10355/9993
    Citation
    arXiv:1012.3827v1
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    • Physics and Astronomy publications (MU)

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