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- W3209460777 abstract "We develop a systematically general theory of one-dimensional (1D) non-Hermitian systems, elaborating on the energy bands, the band degeneracy, and the defectiveness of eigenstates under open boundary conditions. We analyze the band degeneracy and defectiveness of two typical 1D non-Hermitian models. We obtain the unusual presence and absence of the exceptional points in the generalized non-Hermitian Su-Schrieffer-Heeger model under open boundary conditions. Beyond the general theory, we discover that infernal points exist in 1D non-Hermitian systems, where the energy spectra under open boundary conditions converge on some discrete energy values. We analyze two relevant 1D non-Hermitian models with the existence of infernal points. Moreover, we generalize the infernal points to the infernal knots in four-dimensional systems. The general theory and the infernal points of non-Hermitian systems developed in this paper are also valid in Hermitian systems." @default.
- W3209460777 created "2021-11-08" @default.
- W3209460777 creator A5046690397 @default.
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- W3209460777 date "2022-02-18" @default.
- W3209460777 modified "2023-09-26" @default.
- W3209460777 title "Degeneracy and defectiveness in non-Hermitian systems with open boundary" @default.
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- W3209460777 doi "https://doi.org/10.1103/physrevb.105.075420" @default.
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