Non-Hermitian topology driven by an identity term: An exactly solvable paradigm
Lingfang Li, Yating Wei, Yang Ruan, Gangzhou Wu et autres
An identity term in the Hamiltonian is conventionally regarded as spectrally inert-it shifts energies but does not alter eigenstate topology. We show that under non-Hermitian skin pumping, this paradigm fails: a momentum-dependent identity term actively deforms the generalized Brillouin zone, thereby challenging …
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arXiv (Cornell University)