Local vs non-local probes of thermalization for a strongly coupled plasma.
Bellantuono L., Colangelo P., De Fazio F., Giannuzzi F., Nicotri S.
We study the evolution of a deconfined and strongly coupled plasma, from an initial anisotropic and far-from-equilibrium state, to a hydrodynamic regime. The initial state mimics the effects of heavy-ion collisions producing the quark-gluon plasma in experiments at RHIC and LHC. The relaxation process is analyzed following the behavior of local and non-local probes: the stress-energy tensor, equal-time correlation functions and Wilson loops. We find a hierarchy among the thermalization times of energy density, pressures and large probes, indicating that relaxation is faster at short length scales, a feature of strongly coupled theories.