Rényi Entropy Singularities as Signatures of Topological Criticality in Coupled Photon-Fermion Systems

F. P. M. Méndez-Córdoba, J. J. Mendoza-Arenas, F. J. Gómez-Ruiz +3

We show that the topological phase transition for a Kitaev chain embedded in a cavity can be identified by measuring experimentally accessible photon observables such as the Fano f…