Speaker
Tilman Enss
Description
In heavy ion collisions, hydrodynamic attractors can describe
out-of-equilibrium dynamics before hydrodynamics is expected to be
valid. We describe how such behavior might be observed in real time in
ultracold atomic Fermi gases. We present an efficient way to compute
Green functions in real frequency beyond the derivative expansion and
discuss how the system relaxes toward equilibrium. On relevant time
scales, the dynamics is well represented by an analytical attractor
solution that is valid at shorter times before the onset of Navier-Stokes
hydrodynamics. The attractor represents an asymptotic series
at long times and is complemented by nonhydrodynamic modes.
