Topological states in non-Hermitian two-dimensional Su-Schrieffer-Heeger model
Mesoscale and Nanoscale Physics
2019-10-16 v1 Optics
Quantum Physics
Abstract
A non-Hermitian topological insulator with real spectrum is interesting in the theory of non-Hermitian extension of topological systems. We find an experimentally realizable example of a two dimensional non-Hermitian topological insulator with real spectrum. We consider two-dimensional Su-Schrieffer-Heeger (SSH) model with gain and loss. We introduce non-Hermitian polarization vector to explore topological phase and show that topological edge states in the band gap exist in the system.
Keywords
Cite
@article{arxiv.1910.06362,
title = {Topological states in non-Hermitian two-dimensional Su-Schrieffer-Heeger model},
author = {C. Yuce and H. Ramezani},
journal= {arXiv preprint arXiv:1910.06362},
year = {2019}
}