Including inelastic scattering in a simplified gluon kinetic theory speeds up hydrodynamization, and attractors appear through gapped eigenstates of an effective Hamiltonian even without pre-thermal scaling.
Holographic isotropization linearized
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The holographic isotropization of a highly anisotropic, homogeneous, strongly coupled, non-Abelian plasma was simplified in arXiv:1202.0981 by linearizing Einstein's equations around the final, equilibrium state. This approximation reproduces the expectation value of the boundary stress tensor with a 20% accuracy. Here we elaborate on these results and extend them to observables that are directly sensitive to the bulk interior, focusing for simplicity on the entropy production on the event horizon. We also consider next-to-leading-order corrections and show that the leading terms alone provide a better description of the isotropization process for the states that are furthest from equilibrium.
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Attractors Without Scaling: Adiabatic Hydrodynamization With and Without Inelastic Scattering
Including inelastic scattering in a simplified gluon kinetic theory speeds up hydrodynamization, and attractors appear through gapped eigenstates of an effective Hamiltonian even without pre-thermal scaling.