Periodically driven (Floquet) quantum systems may host interesting phenomena, such as topological phases of ultra-cold atoms  and light-inducedsuperconductivity . These systems are a long-standing subject of theoreticalstudies, which recently focused on isolated quantum many-body systems .In the seminar I will discuss recent results  on the periodically drivenFermi-Hubbard model a prototype of strongly correlated electrons. First, Iwill show that for moderate interaction the system thermalizes, as expected forgeneric isolated many-body systems. Then, I will describe the emergence of aprethermal regime (Floquet prethermalization) as the interaction is increased. This regime is a consequence of a well-known bottleneck mechanism, that is the quasi-conservation of doublon excitations at large interaction. Finally, I will discuss the existence of a critical drive frequency at which the system thermalizes despite the large interaction, due to a resonant condition of the drive frequency with the doublon excitation energy.References G. Jotzu, M. Messer, R. Desbuquois, M. Lebrat, T. Uehlinger, D. Greif, and T. Esslinger, Experimental realisation of the topological Haldane model, Nature 515, 237 (2014). M. Mitrano, A. Cantaluppi, D. Nicoletti, S. Kaiser, A. Perucchi, S. Lupi, P. Di Pietro, D. Pontiroli, M. Ricc o, S. R. Clark, D. Jaksch, and A. Cavalleri, Possible light-induced superconductivity in K3C60 at high temperature, Nature 530, 461 (2016). R. Moessner and S. L. Sondhi, Equilibration and Order in Quantum Floquet Matter, NaturePhysics 13, 424 (2017). F. Peronaci, M. Schir o, and O. Parcollet, Resonant thermalization of periodically drivenstrongly correlated electrons, arXiv:1711.07889 (2017).