Shear viscosity and Chern-Simons diffusion rate from hyperbolic horizons

被引：7
|
作者：
Koutsoumbas, George [1 ]
Papantonopoulos, Eleftherios [1 ]
Siopsis, George [2 ]
机构：
[1] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece
[2] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
来源：
PHYSICS LETTERS B | 2009年 / 677卷 / 1-2期
关键词：
BLACK-HOLES;
D O I：
10.1016/j.physletb.2009.05.010
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the shear viscosity and anomalous baryon number violation rate in quantum field theories at finite temperature having gravity duals with hyperbolic horizons. We find the explicit dependence of these quantities on the temperature. We show that the ratio of shear viscosity to entropy density is below 1/(4 pi) at all temperatures and can be made arbitrarily small in the low temperature limit for hyperbolic surfaces of sufficiently high genus so that the hydrodynamic limit remains valid. (C) 2009 Elsevier B.V. All rights reserved.
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页码：74 / 78
页数：5
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