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- W2969855071 abstract "A modified periodic boundary condition adequate for non-hermitian topological systems is proposed. Under this boundary condition a topological number characterizing the system is defined in the same way as in the corresponding hermitian system and hence, at the cost of introducing an additional parameter that characterizes the non-hermitian skin effect, the idea of bulk-edge correspondence in the hermitian limit can be applied almost as it is. We develop this framework through the analysis of a non-hermitian SSH model with chiral symmetry, and prove the bulk-edge correspondence in a generalized parameter space. A finite region in this parameter space with a nontrivial pair of chiral winding numbers is identified as topologically nontrivial, indicating the existence of a topologically protected edge state under open boundary." @default.
- W2969855071 created "2019-08-29" @default.
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- W2969855071 date "2019-10-31" @default.
- W2969855071 modified "2023-10-17" @default.
- W2969855071 title "Generalized bulk-edge correspondence for non-Hermitian topological systems" @default.
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- W2969855071 doi "https://doi.org/10.1103/physrevb.100.165430" @default.
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