Localization, multifractality, and many-body localization in periodically kicked quasiperiodic lattices

TL;DR

This paper investigates how periodic driving and quasiperiodic disorder influence localization phenomena, revealing a frequency-dependent transition to many-body localization and multifractality in a kicked Aubry-André model.

Contribution

It uncovers the interplay between driving frequency, disorder, and interactions, demonstrating frequency-controlled localization transitions and multifractal states in a driven quasiperiodic lattice.

Findings

High-frequency driving induces a dynamical localization transition.

Low-frequency driving results in complex spectrum with multifractal edges.

Many-body localization occurs at high frequency but vanishes at low frequency.

Abstract

We study the combined effect of quasiperiodic disorder, driven and interaction in the periodically kicked Aubry-Andr\'{e} model. In the non-interacting limit, by analyzing the quasienergy spectrum statistics, we verify the existence of a dynamical localization transition in the high-frequency region, whereas the spectrum statistics becomes intricate in the low-frequency region due to the emergence of the extended/localized-to-multifractal edges in the quasienergy spectrum, which separate the multifractal states from the extended (localized) states. When the interaction is introduced, we find the periodically kicked incommensurate potential can lead to a transition from ergodic to many-body-localization phase in the high-frequency region. However, the many-body localization phase vanishes in the low-frequency region even for strong quasiperiodic disorder. Our studies demonstrate that the periodically kicked Aubry-Andr\'{e} model displays rich dynamical phenomena and the driving frequency plays an important role in the formation of many-body localization in addition to the disorder strength.