Shear Viscosity of a Unitary Fermi Gas

Details Shear Viscosity of a Unitary Fermi Gas Shear Viscosity of a Unitary Fermi Gas

2012-04-01

arxiv.org/abs/1204.0270v1

Physics

Condensed Matter

Quantum Gases

8 pages, 9 figures; supplemental materials included

Scientific paper

We present the first ab initio determination of the shear viscosity eta of the Unitary Fermi Gas, based on finite temperature Quantum Monte Carlo calculations and the Kubo linear-response formalism. We determine the temperature dependence of the shear viscosity to entropy density ratio eta/s, The minimum of eta/s appears to be located above the critical temperature for the superfluid-to-normal phase transition with the most probable value being eta/s approx 0.11 hbar/kB, which almost saturates the Kovtun-Son-Starinets (KSS) universal value hbar/(4 pi kB).

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