3 papers
cond-mat.mes-hall2025
Exceptionally deficient topological square-root insulators
Subhajyoti Bid, Henning Schomerus
One of the most surprising features of effectively non-Hermitian physical systems is their potential to exhibit a striking nonlinear response and fragility to small perturbations.…
quant-ph2025
Fragmented exceptional points and their bulk and edge realizations in lattice models
Subhajyoti Bid, Henning Schomerus
Exceptional points (EPs) are spectral defects displayed by non-Hermitian systems in which multiple degenerate eigenvalues share a single eigenvector. This distinctive feature makes…
quant-ph2024
Uniform response theory of non-Hermitian systems: Non-Hermitian physics beyond the exceptional point
Subhajyoti Bid, Henning Schomerus
Non-Hermitian systems display remarkable response effects that reflect a variety of distinct spectral scenarios, such as exceptional points where the eigensystem becomes defective.…