A sticky business: the status of the conjectured viscosity/entropy density bound

被引：40

作者：

Cherman, Aleksey ^{[1
]}

Cohen, Thomas D. ^{[1
]}

Hohler, Paul M. ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 02期

关键词：

1/N expansion; AdS-CFT correspondence; QCD;

D O I：

10.1088/1126-6708/2008/02/026

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：

There have been a number of forms of a conjecture that there is a universal lower bound on the ratio, eta/s, of the shear viscosity, eta, to entropy density, s, with several different domains of validity. We examine the various forms of the conjecture. We argue that a number of variants of the conjecture are not viable due to the existence of theoretically consistent counterexamples. We also note that much of the evidence in favor of a bound does not apply to the variants which have not yet been ruled out.

引用

页数：44

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