A 3D array of coupled Rashba nanowires forms a helical second-order topological superconductor with gapless helical Z_{2q} parafermionic modes localized on hinges.
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The non-Hermitian skin effect originates from spectral instability and non-reciprocity instead of point-gap winding of the Bloch Hamiltonian.
Non-Hermitian Berry phases in time-varying media have a quantized real part due to symmetry, giving a topological index for systems including a non-Hermitian Su-Schrieffer-Heeger model.
citing papers explorer
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$\mathbb Z_{2q}$ parafermionic hinge states in a three-dimensional array of coupled nanowires
A 3D array of coupled Rashba nanowires forms a helical second-order topological superconductor with gapless helical Z_{2q} parafermionic modes localized on hinges.
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Pseudospectral phenomena and the origin of the non-Hermitian skin effect
The non-Hermitian skin effect originates from spectral instability and non-reciprocity instead of point-gap winding of the Bloch Hamiltonian.
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Partial Quantisation of Non-Hermitian Berry Phases in Time-Varying Media
Non-Hermitian Berry phases in time-varying media have a quantized real part due to symmetry, giving a topological index for systems including a non-Hermitian Su-Schrieffer-Heeger model.