Title: Resonant thermalization of periodically driven strongly correlated electrons,
Abstract: We study the dynamics of the Fermi-Hubbard model driven by a time-periodic
modulation of the interaction within nonequilibrium Dynamical Mean-Field
Theory. For moderate interaction, we find clear evidence of thermalization to a
genuine infinite-temperature state with no residual oscillations. Quite
differently, in the strongly correlated regime, we find a quasi-stationary
extremely long-lived state with oscillations synchronized with the drive
(Floquet prethermalization). Remarkably, the nature of this state dramatically
changes upon tuning the drive frequency. In particular, we show the existence
of a critical frequency at which the system rapidly thermalizes despite the
large interaction. We characterize this resonant thermalization and provide an
analytical understanding in terms of a break down of the periodic
Schrieffer-Wolff transformation.