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- W2003669137 abstract "We study the shear viscosity of a dilute Fermi gas as a function of the scattering length in the vicinity of the unitarity limit. The calculation is based on kinetic theory, which provides a systematic approach to transport properties in the limit in which the fugacity $z=nlambda^3/2$ is small. Here, $n$ is the density of the gas and $lambda$ is the thermal wave length of the fermions. At leading order in the fugacity expansion the shear viscosity is independent of density, and the minimum shear viscosity is achieved at unitarity. At the next order medium effects modify the scattering amplitude as well as the quasi-particle energy and velocity. We show that these effects shift the minimum of the shear viscosity to the Bose-Einstein condensation (BEC) side of the resonance, in agreement with the result of recent experiments." @default.
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- W2003669137 date "2014-12-08" @default.
- W2003669137 modified "2023-10-10" @default.
- W2003669137 title "Medium effects and the shear viscosity of the dilute Fermi gas away from the conformal limit" @default.
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- W2003669137 doi "https://doi.org/10.1103/physreva.90.063615" @default.
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