Exponential approach to the hydrodynamic attractor in Yang-Mills kinetic theory
(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.
(Less)
- author
- Du, Xiaojian ; Heller, Michal P. ; Schlichting, Sören and Svensson, Viktor LU
- organization
- publishing date
- 2022
- 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}}, }