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Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow
Date Issued
04-12-2020
Author(s)
Mitra, Toshali
Mondkar, Sukrut
Indian Institute of Technology, Madras
Rebhan, Anton
Soloviev, Alexander
Abstract
The nonequilibrium evolution in a boost-invariant Bjorken flow of a hybrid viscous fluid model containing two interacting components with different viscosities, such that they represent strongly and weakly self-coupled sectors, is shown to be characterized by a hydrodynamic attractor which has an early-Time behavior that is reminiscent of the so-called bottom-up thermalization scenario in heavy-ion collisions. The hydrodynamization times for the two sectors can differ strongly, with details depending on the curve realized on the two-dimensional attractor surface, which might account for different scenarios for small and large systems in nuclear collisions. The total system behaves as a single viscous fluid with a dynamically determined effective shear viscosity.
Volume
2