On the hydrodynamic attractor of Yang–Mills plasma

There is mounting evidence suggesting that relativistic hydrodynamics becomes relevant for the physics of quark–gluon plasma as the result of nonhydrodynamic modes decaying to an attractor apparent even when the system is far from local equilibrium. Here we determine this attractor for Bjorken flow...

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Bibliographic Details
Published in:Physics letters. B 2018-01, Vol.776 (C), p.468-472
Main Author: Spaliński, Michał
Format: Article
Language:English
Subjects:
AdS/CFT
Quark–gluon plasma
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Summary:There is mounting evidence suggesting that relativistic hydrodynamics becomes relevant for the physics of quark–gluon plasma as the result of nonhydrodynamic modes decaying to an attractor apparent even when the system is far from local equilibrium. Here we determine this attractor for Bjorken flow in N=4 supersymmetric Yang–Mills theory (SYM) using Borel summation of the gradient expansion of the expectation value of the energy momentum tensor. By comparing the result to numerical simulations of the flow based on the AdS/CFT correspondence we show that it provides an accurate and unambiguous approximation of the hydrodynamic attractor in this system. This development has important implications for the formulation of effective theories of hydrodynamics.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2017.11.059