Non-ergodic dynamics in many-body interacting systems has recently attracted much interest. Polar lattice gases exhibit interesting dynamics even in the absence of perturbations. This has been mostly discussed in the hardcore regime. We show that the dynamics of dipolar lattice bosons in soft cores can be significantly different. We find that, in contrast to hardcore dipoles, bosons tend to delocalize for large site-to-site interaction strengths due to the key role played by interaction-induced hopping. Interestingly, the interaction between bare and interaction-induced tunneling leads to precise decoupling of the Hilbert space between ergodic states near the lattice-depth dependent value of the dipole intensity. There is a possibility. non-ergodic state. Our results highlight the important role that density-dependent hopping may play in future experiments in non-equilibrium systems with long-range interactions.
