Out-of-equilibrium states and quasi-many-body localization in polar lattice gases

TL;DR

This paper explores the out-of-equilibrium dynamics of ultracold polar gases in optical lattices, revealing phenomena like cluster formation, effective blockade, and potential for studying many-body localization without disorder.

Contribution

It introduces new insights into out-of-equilibrium states and localization phenomena in polar lattice gases, highlighting their experimental accessibility and novel dynamical behaviors.

Findings

Formation of dynamically-bound clusters and effective blockade effects.

Potential for realizing quasi-equilibrated repulsive gases with attractive interactions.

Proposal for studying many-body localization without quenched disorder.

Abstract

The absence of energy dissipation leads to an intriguing out-of-equilibrium dynamics for ultracold polar gases in optical lattices, characterized by the formation of dynamically-bound on-site and inter-site clusters of two or more particles, and by an effective blockade repulsion. These effects combined with the controlled preparation of initial states available in cold gases experiments can be employed to create interesting out-of-equilibrium states. These include quasi-equilibrated effectively repulsive 1D gases for attractive dipolar interactions and dynamically-bound crystals. Furthermore, non-equilibrium polar lattice gases can offer a promising scenario for the study of many-body localization in the absence of quenched disorder. This fascinating out-of-equilibrium dynamics for ultra-cold polar gases in optical lattices may be accessible in on-going experiments.