Topological transitions with an imaginary Aubry-André-Harper potential

• Main Authors: Zhu, Bofeng, Lang, Li-Jun, Wang, Qiang, Wang, Qi Jie, Chong, Yidong
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2023
• Subjects: Topology; Domain Walls
• Online Access: https://hdl.handle.net/10356/169642
• Institution: Nanyang Technological University

We study one-dimensional lattices with imaginary-valued Aubry-André-Harper (AAH) potentials. Such lattices can host edge states with purely imaginary eigenenergies, which differ from the edge states of the Hermitian AAH model and are stabilized by a non-Hermitian particle-hole symmetry. The edge sta...