Topology with broken parity-time symmetry

Lei Xiao, Xingze Qiu, Kunkun Wang +3

Topological edge states arise in parity-time ($\mathcal{P}\mathcal{T}$)-symmetric non-unitary quantum dynamics but have so far only been discussed in the $\mathcal{P}\mathcal{T}$-symmetry-unbroken reg…