Non-Abelian topological charge of photons in periodic/non-periodic media and non-Hermitian systems by Haedong Park, Ananya Ghatak, Sang Soon Oh

“…In this review, we introduce the basic concept of non-Abelian topology in different dimensions and symmetries and review recent development in the realization of non-Abelian topological charges in various physical systems such as 3D photonic crystals, metamaterials, coupled waveguides and cavity systems. Further, we discusshow non-Hermiticity plays a role in the non-Abelian topology of bands or eigenvalues starting from reviewing theoretical models in condensed matter physics.…”
Get full text