Floquet-induced localization in long-range many-body systems

TL;DR

This paper demonstrates that Floquet dynamics with spatiotemporal disorder can induce and enhance many-body localization in long-range interacting systems, expanding the understanding of localization mechanisms.

Contribution

It introduces a Floquet-based method to induce localization in long-range systems and maps the phase diagram, showing increased localization power over static disorder.

Findings

Floquet dynamics induce localization in long-range systems.

The phase boundary shifts favoring localization with Floquet methods.

Long-time simulations support static analysis results.

Abstract

The fate of many-body localization in long-range interacting systems is not fully settled. For instance, the phase boundary between ergodic and many-body localized regimes is still under debate. Here, we use Floquet dynamics which can induce many-body localization in a clean long-range interacting system through spatiotemporal disorder, which are realized by regular operation of random local rotations. The phase diagram has been determined for two types of uniform and nonuniform long-range couplings. Our Floquet mechanism shows more localizing power than conventional static disorder methods as it pushes the phase boundary in favor of the localized phase. Moreover, our comprehensive long-time simulations provide strong support for obtained results based on static analysis.