Exponential approach to the hydrodynamic attractor in Yang-Mills kinetic theory

被引：18

作者：

Du, Xiaojian ^{[1
]}

Heller, Michal P. ^{[2
]}

Schlichting, Soeren ^{[1
]}

Svensson, Viktor ^{[3
]}

机构：

[1] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany

[2] Univ Ghent, Dept Phys & Astron, B-9000 Ghent, Belgium

[3] Lund Univ, Div Solid State Phys & NanoLund, S-22100 Lund, Sweden

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 01期

关键词：

THERMODYNAMICS;

D O I：

10.1103/PhysRevD.106.014016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use principal component analysis to study the hydrodynamic attractor in Yang-Mills kinetic theory undergoing the Bjorken expansion with color glass condensate initial conditions. The late-time hydro-dynamic attractor is characterized by a single principal component determining the overall energy scale. How it is reached is governed by the disappearance of single subleading principal component character-izing deviations of the pressure anisotropy, the screening mass and the scattering rate. We find that for wide range of couplings the approach to the hydrodynamic attractor at late times is well described by an exponential. Its decay rate dependence on the coupling turns out to translate into a simple dependence on the shear viscosity to entropy density ratio.

引用

页数：11

共 77 条

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