Experimental simulation of symmetry-protected higher-order exceptional points with single photons
Experimental simulation of symmetry-protected higher-order exceptional points with single photons
Exceptional points (EPs) of non-Hermitian (NH) systems have recently attracted increasing attention due to their rich phenomenology and intriguing applications. Compared to the predominantly studied second-order EPs, higher-order EPs have been assumed to play a much less prominent role because they generically require the tuning of more parameters. Here, we …