Resurgent revivals in bosonic quantum gases: A striking signature of many-body quantum interferences

We study the consequences of matter-wave revivals associated with many-body quantum interferences on physical observables for an ultracold bosonic system in an optical lattice. For the Bose-Hubbard dimer, we show that the interplay between weak intersite tunneling and strong on-site interactions can lead to the quantum dynamics of a density wave displaying several features not found in the mean-field limit. We demonstrate in particular the influence of these phenomena on occupancy oscillations and coherence. We furthermore observe resurgent revivals and a (anti)synchronization of revival peaks and occupancy oscillation peaks, which are the signatures of cooperative matter-wave interference effects that alternate between constructive and destructive features leading to the peak revival behaviors. The impact of such many-body quantum interference phenomena in various experimentally accessible observables is presented, paving the way for their detection in future ultracold-atom experiments.