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Quasiperiodicity-induced non-Hermitian skin effect from the breakdown of scale-free localization

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arxiv 2602.11155 v2 pith:F34AGIXM submitted 2026-02-11 cond-mat.mes-hall

Quasiperiodicity-induced non-Hermitian skin effect from the breakdown of scale-free localization

Kazuma Saito , Ryo Okugawa , Kazuki Yokomizo , Takami Tohyama , Chen-Hsuan Hsu This is my paper
classification cond-mat.mes-hall
keywords boundarynon-hermitianboundariesbreakdownconditionseffectlocalizationnhse
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Non-reciprocal systems exhibit extreme sensitivity to boundary conditions, typically manifesting as the non-Hermitian skin effect (NHSE) under open boundaries. By bridging the boundaries with a tunable impurity bond, one can access intermediate regimes where scale-free localization (SFL) can emerge. Here, we investigate the competition between such boundary coupling and quasiperiodic disorder in a one-dimensional non-reciprocal lattice. Our analyses reveal a quasiperiodicity-induced breakdown of the SFL regime, which evolves into either the NHSE or an extended regime, depending on boundary conditions. These results uncover the crucial roles of boundary effects and quasiperiodicity in non-Hermitian systems.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Higher-winding phases in one-dimensional non-Hermitian topological superconductors

    cond-mat.mes-hall 2026-06 unverdicted novelty 6.0

    A coefficient-based approach derives analytical phase boundaries and higher winding numbers in 1D non-Hermitian topological superconductors, verified via open-boundary spectra and disorder stability.

  2. Drag-induced skin effect in a Bose-Fermi mixture

    cond-mat.quant-gas 2026-06 unverdicted novelty 6.0

    A new interaction-mediated drag-induced non-Hermitian skin effect is proposed for Bose-Fermi mixtures with asymmetric bosonic tunneling.

  3. Competing skin effect and quasiperiodic localization in the non-Hermitian Su-Schrieffer-Heeger chain: Reentrant delocalization, spectral topology destruction, and entanglement suppression

    cond-mat.mes-hall 2026-03 unverdicted novelty 6.0

    In the non-Hermitian SSH chain with AAH disorder, a competition regime shows reentrant partial delocalization, a modified localization boundary λ_c(δ)=2√(v_eff w), unwinding of spectral loops, and entanglement suppres...