2022/08/01 by Sunil Jaiswal, Subrata Pal, Jaiswal, Sunil +7
Engineering · Physics and Astronomy · #Dust and Plasma Wave Phenomena #FOS: Physical sciences #Fluid Dynamics and Turbulent Flows #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Solar and Space Plasma Dynamics
paper · pdf · doi:10.48550/arxiv.2208.00744
openalex publication_date 2022/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the far-off-equilibrium dynamics of a Bjorken expanding non-conformal system within kinetic theory and hydrodynamics. We show that, in contrast to the conformal case, neither shear nor bulk viscous pressure relax quickly to a non-equilibrium attractor. In kinetic theory an early-time, far-from-equilibrium attractor exists for the scaled longitudinal pressure, driven by the rapid longitudinal expansion of the medium. Second-order dissipative hydrodynamics fails to accurately describe this attractor, but a modified anisotropic hydrodynamic formulation reproduces it and provides excellent agreement with kinetic theory.