Limits of topological protection under local periodic driving

Z. Fedorova (Cherpakova); C. Jörg; C. Dauer; F. Letscher; M. Fleischhauer; S. Eggert; S. Linden; G. von Freymann

doi:10.1038/s41377-019-0172-8

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Limits of topological protection under local periodic driving

Article

- Limits of topological protection under local periodic driving
- Light: Science & Applications Vol. 8, Issue 4, Pages: 546-557(2019)
- Affiliations：
  
  1.Physikalisches Institut, Universit?t Bonn, 53115 Bonn, Germany
  2.Physics Department and Research Center OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany
  3.Graduate School Materials Science in Mainz, 67663 Kaiserslautern, Germany
  4.Fraunhofer Institute for Industrial Mathematics ITWM, 67663 Kaiserslautern, Germany
- Author bio：
  
  Z Fedorova Cherpakova (cherpakova@physik.uni-bonn.de)
  C Jörg (cjoerg@physik.uni-kl.de)
- Funds：
- DOI：10.1038/s41377-019-0172-8
  CLC：
- Published：2019，
  
  Published Online：10 July 2019，
  
  Received：13 December 2018，
  
  Revised：05 June 2019，
  
  Accepted：14 June 2019
- Accepted：
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Fedorova (Cherpakova), Z. et al. Limits of topological protection under local periodic driving. Light: Science & Applications, 8, 546-557 (2019).
DOI：

Fedorova (Cherpakova), Z. et al. Limits of topological protection under local periodic driving. Light: Science & Applications, 8, 546-557 (2019). DOI： 10.1038/s41377-019-0172-8.

摘要

Abstract

The bulk-edge correspondence guarantees that the interface between two topologically distinct insulators supports at least one topological edge state that is robust against static perturbations. Here

we address the question of how dynamic perturbations of the interface affect the robustness of edge states. We illuminate the limits of topological protection for Floquet systems in the special case of a static bulk. We use two independent dynamic quantum simulators based on coupled plasmonic and dielectric photonic waveguides to implement the topological Su-Schriefer-Heeger model with convenient control of the full space- and time-dependence of the Hamiltonian. Local time-periodic driving of the interface does not change the topological character of the system but nonetheless leads to dramatic changes of the edge state

which becomes rapidly depopulated in a certain frequency window. A theoretical Floquet analysis shows that the coupling of Floquet replicas to the bulk bands is responsible for this effect. Additionally

we determine the depopulation rate of the edge state and compare it to numerical simulations.

关键词

Keywords

references

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