Accumulation of scale-free localized states induced by local non-Hermiticity
Accumulation of scale-free localized states induced by local non-Hermiticity
The bulk states of Hermitian systems are believed insensitive to local Hermitian impurities or perturbations except for a few impurity-induced bound states. Thus, it is important to ask whether \textit{local} non-Hermiticity can cause drastic changes to the original Hermitian systems. Here we address this issue affirmatively and present exact solutions …