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

Du, Xiaojian ; Heller, Michal P. ; Schlichting, Sören and Svensson, Viktor LU (2022) In Physical Review D 106(1).
Abstract

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 hydrodynamic 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 characterizing 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... (More)

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 hydrodynamic 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 characterizing 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.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
106
issue
1
article number
014016
publisher
American Physical Society
external identifiers
  • scopus:85135878006
ISSN
2470-0010
DOI
10.1103/PhysRevD.106.014016
language
English
LU publication?
yes
id
5ac7e9e4-6f5b-4fc3-ade5-75ce413b121b
date added to LUP
2022-09-19 11:59:39
date last changed
2023-11-21 08:00:52
@article{5ac7e9e4-6f5b-4fc3-ade5-75ce413b121b,
  abstract     = {{<p>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 hydrodynamic 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 characterizing 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.</p>}},
  author       = {{Du, Xiaojian and Heller, Michal P. and Schlichting, Sören and Svensson, Viktor}},
  issn         = {{2470-0010}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D}},
  title        = {{Exponential approach to the hydrodynamic attractor in Yang-Mills kinetic theory}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.106.014016}},
  doi          = {{10.1103/PhysRevD.106.014016}},
  volume       = {{106}},
  year         = {{2022}},
}