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arXiv · 2006.09383

Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow

Toshali Mitra·Sukrut Mondkar·Ayan Mukhopadhyay·Anton Rebhan·Alexander Soloviev
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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 like a single viscous fluid with a dynamically determined effective shear viscosity.

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Toshali Mitra, Sukrut Mondkar, Ayan Mukhopadhyay, Anton Rebhan, Alexander Soloviev. 2020-06-16. Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow. https://doi.org/10.1103/physrevresearch.2.043320

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