Shear viscosity from R-charged AdS black holes
J. Mas
TL;DR
This paper calculates the shear viscosity in a supersymmetric gauge theory with chemical potential using AdS/CFT correspondence, confirming the universal ratio of shear viscosity to entropy density as 1/4π.
Contribution
It provides a computation of shear viscosity in a charged black hole background, extending the universality result to theories with chemical potential.
Findings
Shear viscosity to entropy density ratio remains 1/4π with chemical potential.
No deviation from the universal ratio in the studied background.
Supports the universality of shear viscosity in gauge/gravity duality.
Abstract
We compute the shear viscosity in the supersymmetric Yang-Mills theory dual to the STU background. This is a thermal gauge theory with a chemical potential. The quotient of the shear viscosity over the entropy density exhibits no deviation from the well known result 1/4\pi.
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