Edge modes, degeneracies, and topological numbers in non-Hermitian systems
We analyze chiral topological edge modes in a non-Hermitian variant of the 2D Dirac equation. Such modes appear at interfaces between media with different "masses" and/or signs of the "non-Hermitian charge." The existence of these edge modes is intimately related to exceptional points of the bulk Hamiltonians, i.e., degeneracies in the bulk spectra of the media. We find that the topological edge modes can be divided into three families ("Hermitian-like," "non-Hermitian," and "mixed"); these are...[Show more]
|Collections||ANU Research Publications|
|Source:||Physical review letters|
|Leykam D et al Edge modes degeneracies and 2017.pdf||260.69 kB||Adobe PDF|
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.