Asymptotics of quantum channels

Abstract We discuss several aspects concerning the asymptotic dynamics of discrete-time semigroups associated with a quantum channel. By using an explicit expression map, which describes action channel on its attractor manifold, we investigate role permutations in dynamics. show that, general, they make evolution non-unitary, and are related to divisibility Also, derive results about asymptotics faithful non-faithful channels, establish constructive unfolding theorem for