PT Symmetry in Non-Hermitian Topological Systems

Dear Colleagues,

Recently, the topological band theory has been extended in the non-Hermitian versions of the topological insulator, revealing abundant topological phenomena. One of the most typical physics is the spontaneous breaking of parity-time symmetry, leading to the existence of an imaginary energy spectrum. Another typical non-Hermitian topological phenomenon is the non-Bloch theory and on-Hermitian skin effect related to the complex momentum. These non-Hermitian topological phenomena essentially originate from the symmetry of a non-Hermitian Hamiltonian, a crucial concept in the analysis of topological physics that determines the equivalence between two kinds of non-Hermitian topological phenomena in some respects. Non-Hermitian topological physics also promote investigations into non-Hermitian topological dynamics, e.g., non-normal Hamiltonian dynamics. This Special Issue focuses on non-Hermitian topological physics, especially the symmetry of non-Hermitian topological systems.

Dr. Lu Qi
Dr. Xiuyun Zhang
Guest Editors

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• non-Hermitian topological physics
• PT symmetry
• non-Bloch theory
• non-Hermitian skin effect
• non-Hermitian topological dynamics