3 papers
physics.optics2025
Generalized Wigner-Smith theory for perturbations at exceptional and diabolic point degeneracies
Kaiyuan Wang, Niall Byrnes, Matthew R. Foreman
Spectral degeneracies, including diabolic (DP) and exceptional (EP) points, exhibit unique sensitivity to external perturbations, enabling powerful control and engineering of wave…
physics.optics2025
Topological Engineering of High-Order Exceptional Points through Transformation Optics
Kaiyuan Wang, Qi Jie Wang, Matthew R. Foreman +1
Exceptional points (EPs) in non-Hermitian photonic systems have attracted considerable research interest due to their singular eigenvalue topology and associated anomalous physical…
math-ph2024
Bootstrapping cascaded random matrix models: correlations in permutations of matrix products
Niall Byrnes, Gary R. W. Greaves, Matthew R. Foreman
Random matrix theory is a useful tool in the study of the physics of multiple scattering systems, often striking a balance between computation speed and physical rigour. Propagatio…