Topological phase in a non-Hermitian PT symmetric system

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Physics Letters, Section A: General, Atomic and Solid State Physics, vol.379, no.18-19, pp.1213-1218, 2015 (SCI-Expanded) identifier identifier identifier


© 2015 Elsevier B.V.All rights reserved.In this work, we consider a tight binding lattice with two non-Hermitian impurities. The system is described by a non-Hermitian generalization of the Aubry-Andre model. We show that there exists topologically nontrivial edge states for the system in the PT symmetric region.