Weak and strong coupling equilibration in nonabelian gauge theories

Keegan, Liam; Kurkela, Aleksi; Romatschke, Paul; van der Schee, Wilke; Zhu, Yan

doi:10.1007/JHEP04(2016)031

Title: Weak and strong coupling equilibration in nonabelian gauge theories

Journal Article · Wed Apr 06 00:00:00 EDT 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP04(2016)031· OSTI ID:1248482

Keegan, Liam ^[1]; Kurkela, Aleksi ^[2]; Romatschke, Paul ^[3]; van der Schee, Wilke ^[4]; Zhu, Yan ^[5]

European Organization for Nuclear Research (CERN), Geneva (Switzerland)
European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Stavanger, Stavanger (Norway)
Univ. of Colorado, Boulder, CO (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. of Jyvaskyla (Finland)

In this study, we present a direct comparison studying equilibration through kinetic theory at weak coupling and through holography at strong coupling in the same set-up. The set-up starts with a homogeneous thermal state, which then smoothly transitions through an out-of-equilibrium phase to an expanding system undergoing boost-invariant flow. This first apples-to-apples comparison of equilibration provides a benchmark for similar equilibration processes in heavy-ion collisions, where the equilibration mechanism is still under debate. We find that results at weak and strong coupling can be smoothly connected by simple, empirical power-laws for the viscosity, equilibration time and entropy production of the system.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0008132; SC0011090

OSTI ID:: 1248482

Journal Information:: Journal of High Energy Physics (Online), Vol. 2016, Issue 4; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 65 works

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