In a three-resonator model, an asymptotic exceptional point at a Hermitian diabolic point enables chiral-mode switching with eigenvalue response scaling as the 3/2 power of perturbation strength.
(B8) Thus, in the angular-momentum (k-) space,V ± act as unidirectional shift operators
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Chiral-Mode Control around a Hermitian Diabolic Point in Discrete Non-Hermitian Coupled Resonators
In a three-resonator model, an asymptotic exceptional point at a Hermitian diabolic point enables chiral-mode switching with eigenvalue response scaling as the 3/2 power of perturbation strength.