Homotopy characterization of non-Hermitian Hamiltonians

Wojcik CC, Sun X-Q, Bzdušek T & Fan S
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Wojcik, C. C., Sun, X. Q., Bzdušek, T., & Fan, S. (2020). Homotopy characterization of non-Hermitian Hamiltonians. Physical Review B, 101(20), 205417 (17 pp.). https://doi.org/10.1103/PhysRevB.101.205417