Relation between $\mathcal{P}\mathcal{T}$-symmetry breaking and topologically nontrivial phases in the SSH and Kitaev models

Marcel Klett, Holger Cartarius, Dennis Dast +2

Non-Hermitian systems with $\mathcal{P}\mathcal{T}$ symmetry can possess purely real eigenvalue spectra. In this work two one-dimensional systems with two different topological phases, the t…