Floquet-engineered fidelity revivals in the PXP model

We investigate the dynamics of the periodically driven PXP model and show how the interplay between spectral properties and initial states gives rise to distinct dynamical regimes, revealed by the pattern of the revivals. For Néel-ordered initial states, revivals follow distinct trajectories governed primarily by a dominant quasienergy spacing in the Floquet spectrum. Initial states interpolating between Néel and fully polarized configurations display hybrid dynamics, whose character can be tuned through their overlap with Floquet eigenstates by varying the driving parameters. This tunability also provides different pathways to avoid Floquet thermalization, highlighting how both the initial state and the driving protocol shape long-lived dynamics in driven quantum many-body systems.