Bulk-edge correspondence and stability of multiple edge states of a $\mathcal{P}\mathcal{T}$ symmetric non-Hermitian system by using non-unitary quantum walks

Makio Kawasaki, Ken Mochizuki, Norio Kawakami +1

Topological phases and the associated multiple edge states are studied for parity and time-reversal $(\mathcal{P}\mathcal{T})$ symmetric non-Hermitian open quantum systems by constructing a…