Equations of motion governing the dynamics of the exceptional points of parameterically dependent nonhermitian Hamiltonians

Milan Šindelka, Pavel Stránský, Pavel Cejnar

We study exceptional points (EPs) of a nonhermitian Hamiltonian $\hat{H}(\lambda ,\delta )$ whose parameters $\lambda \in \mathbb{C}$ and $\delta \in \mathbb{R}$. As the real control parameter $\delta$ is vari…