In a two-parameter family of quadratic bosonic Hamiltonians from a modified bosonic SSH model, topological phase transitions occur along lines of Krein collisions and topological classification holds in both stable and unstable regimes via symplectic Berry phase and index theory.
Okuma \ and\ author M
2 Pith papers cite this work, alongside 367 external citations. Polarity classification is still indexing.
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Higher-winding phases with multiple Majorana pairs per end in 1D non-Hermitian topological superconductors are mapped with the Schur-Cohn zero-counting method and confirmed in open-boundary spectra.
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Decoupling band topology from criticality in bosonic systems
In a two-parameter family of quadratic bosonic Hamiltonians from a modified bosonic SSH model, topological phase transitions occur along lines of Krein collisions and topological classification holds in both stable and unstable regimes via symplectic Berry phase and index theory.
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Higher-winding phases in one-dimensional non-Hermitian topological superconductors
Higher-winding phases with multiple Majorana pairs per end in 1D non-Hermitian topological superconductors are mapped with the Schur-Cohn zero-counting method and confirmed in open-boundary spectra.