  We discuss the onset of the thermalization process in high-energy heavy-ion
collisions from a weak coupling perspective, using classical-statistical
real-time lattice simulations as a first principles tool to study the
pre-equilibrium dynamics. Most remarkably, we find that the thermalization
process is governed by a universal attractor, where the space-time evolution of
the plasma becomes independent of the initial conditions and exhibits the
self-similar dynamics characteristic of wave turbulence. We discuss the
consequences of our weak coupling results for the thermalization process in
heavy-ion experiments and briefly comment on the use of weak coupling
techniques at larger values of the coupling.
