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

TL;DR

This paper investigates how many-body quantum interferences in ultracold bosonic systems lead to unique revival phenomena, revealing complex dynamics like occupancy oscillations and revivals that differ from mean-field predictions.

Contribution

It demonstrates that weak tunneling combined with strong onsite interactions causes novel revival behaviors due to cooperative quantum interference effects.

Findings

Observation of occupancy oscillations and revivals in density waves

Identification of anti-synchronization between revivals and oscillations

Experimental accessibility of these many-body interference phenomena

Abstract

Matter wave revivals depend on a delicate interplay of constructive many-body quantum interferences in the developing dynamics of an ultracold bosonic system in an optical lattice. It is shown that the interplay between weak intersite tunneling and strong onsite interactions can lead to the quantum dynamics of a density wave displaying several features not found in the mean-field limit: occupancy oscillations, resurgent revivals, and a (anti-) synchronization of revival peaks and occupancy oscillation peaks. This implies cooperative interference effects that alternate between constructive and destructive features leading to the peak revival behaviors. These many-body quantum interference phenomena create striking features in various observables, which are accessible in experimental measurements.