The onset threshold for time-growing bound states in a PT-symmetric chain of N unit cells is γ_c = 2 sin[π/(4N)], below which time-independent scattering remains physical.
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Boundary Floquet driving reconstructs bulk spectra and dynamics in non-Hermitian skin-effect systems via a new Floquet non-Bloch band theory valid at arbitrary frequencies.
A metric-tensor-based covariant formalism uniquely defines the Berry connection in non-Hermitian systems, resolving GL(N,C) gauge ambiguities and enabling consistent geometric phases and topological invariants.
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Physical relevance of time-independent scattering predictions in periodic $\mathcal{PT}$-symmetric chains
The onset threshold for time-growing bound states in a PT-symmetric chain of N unit cells is γ_c = 2 sin[π/(4N)], below which time-independent scattering remains physical.
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Boundary Floquet Control of Bulk non-Hermitian Systems
Boundary Floquet driving reconstructs bulk spectra and dynamics in non-Hermitian skin-effect systems via a new Floquet non-Bloch band theory valid at arbitrary frequencies.
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Resolving Gauge Ambiguities of the Berry Connection in Non-Hermitian Systems
A metric-tensor-based covariant formalism uniquely defines the Berry connection in non-Hermitian systems, resolving GL(N,C) gauge ambiguities and enabling consistent geometric phases and topological invariants.