Description
We investigate far from equilibrium energy transport in
strongly coupled quantum critical systems. Combining results
from gauge-gravity duality, relativistic hydrodynamics, and
quantum field theory, we argue that long-time energy
transport after a local thermal quench occurs via a
universal steady-state for any spatial dimensionality. This
is described by a boosted thermal state. We determine the
transport properties of this emergent steady state,
including the average energy flow and its long-time
fluctuations.
