Dissipation in mechanics, optics, acoustics, and electronic circuits is nowadays recognized
to be not always detrimental but can be exploited to achieve non-Hermitian topological …

Exceptional points with coalescence of eigenvalues and eigenvectors are spectral
singularities in the parameter space, achieving which often needs fine-tuning of parameters …

Singular electromagnetics, also known as singular optics in the visible spectrum, is a branch
of modern electromagnetics/optics that studies the solutions with nontrivial topological …