Shear viscosity to entropy density ratio in higher derivative gravity with momentum dissipation
نویسندگان
چکیده
منابع مشابه
The ratio of shear viscosity to entropy density in generalized theories of gravity
Near the horizon of a black brane solution in Anti-de Sitter space, the long-wavelength fluctuations of the metric exhibit hydrodynamic behaviour. For Einstein’s theory, the ratio of the shear viscosity of near-horizon metric fluctuations η to the entropy per unit of transverse volume s is η/s = 1/4π. We propose that, in generalized theories of gravity, this ratio is given by the ratio of two e...
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Starting from relativistic quantum field theories, Kovtun et al. (2005) have quite recently proposed a lower bound η/s ≥ ~/(4πkB), where η is the shear viscosity and s the volume density of entropy for dense liquids. If their proposal can eventually be proved, then this would provide key theoretical underpinning to earlier semiempirical proposals on the relation between a transport coefficient ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.94.066007