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TT: Fachverband Tiefe Temperaturen

TT 31: Dynamics in Many-Body Systems: Interference, Equilibration and Localization II (joint session DY/TT)

TT 31.4: Vortrag

Montag, 12. März 2018, 16:15–16:30, EB 107

Resonant thermalization of periodically driven strongly correlated electrons — •Francesco Peronaci, Marco Schiró, and Olivier Parcollet — Institut de Physique Théorique (IPhT), Gif-sur-Yvette, France

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.