A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.
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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.
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Scale-Free Response with Directional Amplification in Critical Non-Hermitian Systems
A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.
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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.