Stable topological edge states in a non-Hermitian four-band model
Mesoscale and Nanoscale Physics
2019-05-21 v1 Optics
Quantum Physics
Abstract
We introduce a one dimensional non-Hermitian four band tight binding lattice system. We find stable topological edge states protected by particle-hole and parity-time symmetries. We show that topological phase appears in the system. We discuss that the system can also be used as a topological laser if the gain and loss positions in a unit cell are judiciously arranged.
Keywords
Cite
@article{arxiv.1807.01760,
title = {Stable topological edge states in a non-Hermitian four-band model},
author = {C. Yuce},
journal= {arXiv preprint arXiv:1807.01760},
year = {2019}
}
Comments
To appear in Phys. Rev. A