Equilibration Rates in a Strongly Coupled Nonconformal Quark-Gluon Plasma

被引：57

作者：

Buchel, Alex ^{[1
,2
]}

Heller, Michal P. ^{[2
]}

Myers, Robert C. ^{[2
]}

机构：

[1] Univ Western Ontario, Dept Phys & Astron, Dept Appl Math, London, ON N6A 5B7, Canada

[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 25期

基金：

加拿大自然科学与工程研究理事会;

关键词：

BLACK-HOLES;

D O I：

10.1103/PhysRevLett.114.251601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We initiate the study of equilibration rates of strongly coupled quark-gluon plasmas in the absence of conformal symmetry. We primarily consider a supersymmetric mass deformation within N = 2* gauge theory and use holography to compute quasinormal modes of a variety of scalar operators, as well as the energy-momentum tensor. In each case, the lowest quasinormal frequency, which provides an approximate upper bound on the thermalization time, is proportional to temperature, up to a prefactor with only a mild temperature dependence. We find similar behavior in other holographic plasmas, where the model contains an additional scale beyond the temperature. Hence, our study suggests that the thermalization time is generically set by the temperature, irrespective of any other scales, in strongly coupled gauge theories.

引用

页数：5

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