Robustness of entanglement in a non-Hermitian cavity-optomechanical system even away from exceptional points

Jia-Jia Wang, Yu-Hong He, Chang-Geng Liao +2

Quantum physics can be extended into the complex domain by considering non-Hermitian Hamiltonians that are $\mathcal{P}\mathcal{T}$-symmetric. These exhibit exceptional points (EPs) where th…