Time evolution of a toy semiholographic glasma

TL;DR

This paper models the time evolution of a simplified semiholographic system combining classical Yang-Mills fields with a strongly coupled infrared sector via AdS/CFT, revealing energy transfer and entropy growth through numerical simulation.

Contribution

It introduces a dynamic toy model coupling Yang-Mills equations with a holographic sector, including propagating modes and backreaction, to study non-equilibrium evolution.

Findings

Energy transfers from the Yang-Mills sector to the black hole in the dual gravity

Total energy-momentum is conserved despite entropy increase

Numerical simulations demonstrate the system's evolution far from equilibrium

Abstract

We extend our previous study of a toy model for coupling classical Yang-Mills equations for describing overoccupied gluons at the saturation scale with a strongly coupled infrared sector modeled by AdS/CFT. Including propagating modes in the bulk we find that the Yang-Mills sector loses its initial energy to a growing black hole in the gravity dual such that there is a conserved energy-momentum tensor for the total system while entropy grows monotonically. This involves a numerical AdS simulation with a backreacted boundary source far from equilibrium.