Topological chiral interface states beyond insulators
Mesoscale and Nanoscale Physics
2020-08-26 v2 Other Condensed Matter
Abstract
We show how to engineer a chiral spectral flow of interface states in a gapless system. Although the bulk bands touch -- thus making the topological indices of the bands ill-defined -- this spectral flow has a topological origin that makes it robust even when it coexists with the bulk bands. This phenomenon is illustrated with an adiabatically modulated photonic quantum walk.
Cite
@article{arxiv.2002.09374,
title = {Topological chiral interface states beyond insulators},
author = {Lavi K. Upreti and P. Delplace},
journal= {arXiv preprint arXiv:2002.09374},
year = {2020}
}
Comments
8 pages,9 figs