Quantum many-body scars in tilted optical lattices

Ultracold atoms in optical lattices provide a versatile and finely tunable platform for the study of non-equilibrium many-body phenomena. Quantum many-body scars -- a form of weak ergodicity breaking -- have been found in a variety of theoretical models, but their experimental realizations remain scarce. We numerically investigate a tilted 1D optical lattice and find characteristic signatures of quantum many-body scarring, including persistent dynamical revivals, slow growth of entanglement entropy, and the presence of non-thermalizing eigenstates. These signatures of weak ergodicity breaking occur near commensurable values of tilt and interaction energy scales, and their origin is shown to be related to the emergence of regular substructures in the adjacency graph of the model.