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quant-ph2026
Realization of decoherence-induced averaged symmetry-protected topological phases on quantum processors
Ruizhe Shen, Xue-Jia Yu, Ching Hua Lee
Symmetry-protected topological (SPT) phases are conventionally formulated for pure states protected by exact symmetries. In open quantum systems, however, decoherence generates mix…
quant-ph2026
Non-Hermitian topology driven by an identity term: An exactly solvable paradigm
Lingfang Li, Yating Wei, Yang Ruan +6
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…