Programmable anisotropic exceptional points in passive multiport scattering networks

DR-NTU (Nanyang Technological University) 2026 Open access

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Authors: Kaiyuan Wang, Niall Byrnes, Matthew R. Foreman
Cited by: 0

Abstract

Exceptional points are spectral degeneracies of non-Hermitian operators. We show that a passive multiport network can be programmed to exhibit exceptional-point be haviour in a measured-port subspace, even though the full scattering matrix is unitary. By tuning internal phases, we engineer anisotropic eigenvalue splitting and prescribe sensitivity directions in parameter space.

Fields of Study & Subjects

Quantum Mechanics and Non-Hermitian Physics Spectral Theory in Mathematical Physics Metamaterials and Metasurfaces Applications

Publication details

Journal / source
DR-NTU (Nanyang Technological University)
Publication date
1 January 2026
Language
EN