Spin Drag in Ultracold Fermi Mixtures with Repulsive Interactions

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Spin Drag in Ultracold Fermi Mixtures with Repulsive Interactions

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/9993

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Title: Spin Drag in Ultracold Fermi Mixtures with Repulsive Interactions
Author: Duine, R. A.; Polini, Marco; Raoux, Arnaud; Stoof, H. T. C.; Vignale, Giovanni, 1957-
Keywords: quantum gases
Date: 2010-12-17
Publisher: arXiv
Citation: arXiv:1012.3827v1
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

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