Bulk viscosity of strongly coupled plasmas with holographic duals

被引：95

作者：

Gubser, Steven S. ^{[1
]}

Pufu, Silviu S. ^{[1
]}

Rocha, Fabio D. ^{[1
]}

机构：

[1] Princeton Univ, Joseph Henry Labs, Washington Rd, Princeton, NJ 08544 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 08期

基金：

美国国家科学基金会;

关键词：

gauge-gravity correspondence; black holes in string theory;

D O I：

10.1088/1126-6708/2008/08/085

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in [1].

引用

页数：26

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