Equilibration and hydrodynamics at strong and weak coupling
Abstract
We give an updated overview of both weak and strong coupling methods to describe the approach to a plasma described by viscous hydrodynamics, a process now called hydrodynamisation. At weak coupling the very first moments after a heavy ion collision is described by the colourglass condensate framework, but quickly thereafter the mean free path is long enough for kinetic theory to become applicable. Recent simulations indicate thermalization in a time t ~ 40 (η/s)^{4/3}/T, with $$\tau$$ the temperature at that time and η/s the shear viscosity divided by the entropy density. At (infinitely) strong coupling it is possible to mimic heavy ion collisions by using holography, which leads to a dual description of colliding gravitational shock waves. The plasma formed hydrodynamises within a time of 0.41/$$\tau$$ recent extension found corrections to this result for finite values of the coupling, when is bigger than the canonical value of 1/4$$\pi$$, which leads to t ~ (.41+1.6(η/s1/4$$\pi$$))/T. Moreover, future improvements include the inclusion of the effects of the running coupling constant in QCD.
 Authors:

 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Utrecht, Utrecht (Netherlands)
 Publication Date:
 Research Org.:
 Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC)
 OSTI Identifier:
 1500558
 Grant/Contract Number:
 SC0011090
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Nuclear Physics. A
 Additional Journal Information:
 Journal Volume: 967; Journal Issue: C; Journal ID: ISSN 03759474
 Publisher:
 Elsevier
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; hydrodynamisation; holography
Citation Formats
van der Schee, Wilke. Equilibration and hydrodynamics at strong and weak coupling. United States: N. p., 2017.
Web. doi:10.1016/j.nuclphysa.2017.05.003.
van der Schee, Wilke. Equilibration and hydrodynamics at strong and weak coupling. United States. doi:https://doi.org/10.1016/j.nuclphysa.2017.05.003
van der Schee, Wilke. Mon .
"Equilibration and hydrodynamics at strong and weak coupling". United States. doi:https://doi.org/10.1016/j.nuclphysa.2017.05.003. https://www.osti.gov/servlets/purl/1500558.
@article{osti_1500558,
title = {Equilibration and hydrodynamics at strong and weak coupling},
author = {van der Schee, Wilke},
abstractNote = {We give an updated overview of both weak and strong coupling methods to describe the approach to a plasma described by viscous hydrodynamics, a process now called hydrodynamisation. At weak coupling the very first moments after a heavy ion collision is described by the colourglass condensate framework, but quickly thereafter the mean free path is long enough for kinetic theory to become applicable. Recent simulations indicate thermalization in a time t ~ 40 (η/s)4/3/T, with $\tau$ the temperature at that time and η/s the shear viscosity divided by the entropy density. At (infinitely) strong coupling it is possible to mimic heavy ion collisions by using holography, which leads to a dual description of colliding gravitational shock waves. The plasma formed hydrodynamises within a time of 0.41/$\tau$ recent extension found corrections to this result for finite values of the coupling, when is bigger than the canonical value of 1/4$\pi$, which leads to t ~ (.41+1.6(η/s1/4$\pi$))/T. Moreover, future improvements include the inclusion of the effects of the running coupling constant in QCD.},
doi = {10.1016/j.nuclphysa.2017.05.003},
journal = {Nuclear Physics. A},
number = C,
volume = 967,
place = {United States},
year = {2017},
month = {9}
}
Web of Science
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