Driving-induced multiple PT-symmetry breaking transitions and reentrant localization transitions in non-Hermitian Floquet quasicrystals

Longwen Zhou and Wenqian Han
Phys. Rev. B 106, 054307 – Published 12 August 2022

Abstract

The cooperation between time-periodic driving fields and non-Hermitian effects could endow systems with distinctive spectral and transport properties. In this paper, we uncover an intriguing class of non-Hermitian Floquet matter in one-dimensional quasicrystals, which is characterized by the emergence of multiple driving-induced PT-symmetry breaking/restoring transitions, mobility edges, and reentrant localization transitions. These findings are demonstrated by investigating the spectra, level statistics, inverse participation ratios, and wave-packet dynamics of a periodically quenched nonreciprocal Harper model. Our results not only unveil the richness of localization phenomena in driven non-Hermitian quasicrystals but also highlight the advantage of the Floquet approach in generating unique types of nonequilibrium phases in open systems.

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  • Received 15 March 2022
  • Accepted 5 August 2022

DOI:https://doi.org/10.1103/PhysRevB.106.054307

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & OpticalStatistical Physics & Thermodynamics

Authors & Affiliations

Longwen Zhou* and Wenqian Han

  • College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao 266100, China

  • *zhoulw13@u.nus.edu

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Issue

Vol. 106, Iss. 5 — 1 August 2022

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