Periodicity in Ergodic Quantum Processes

Abstract

We study the periodic properties of sequences of quantum channels sampled from an ergodic stochastic process satisfying a natural irreducibility condition. We relate these periodic properties to certain global spectral data defined by the sequence of quantum channels, proving a general Perron-Frobenius-type theorem that in particular constitutes a full generalization of the work of Evans and Høegh-Krohn to the disordered setting.

arXiv comment35 pages; supported by National Science Foundation Grant No. 2153946. V.2 has some corrected statements compared with the previous version