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Implications of hydrodynamic fluctuations on the minimum shear viscosity
of the dilute Fermi gas at unitarity
release_e6sukfcjf5a2johwqmaawvcxeq
by
Paul Romatschke,
Ryan Edward Young
Released
as a article
.
2013
Abstract
We confirm and expand on work by Chafin and Schaefer on hydrodynamic
fluctuations in the unitary Fermi gas. Using the result for the equation of
state from a recent MIT experiment, we derive lower bounds for η/n and
η/s as a function of temperature. Re-analyzing recent quantum Monte Carlo
data for the shear-viscosity spectral function we point out a possible
resolution for the tension between the viscosity bound η/n> 0.3 from Chafin
and Schaefer and the quantum Monte Carlo results η/n<0.2 from Wlazlowski et
al. near the critical temperature
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1209.1604v2
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