Structure of Uniformly Continuous Quantum Markov Semigroups
  The structure of uniformly continuous quantum Markov semigroups with atomic decoherence-free subalgebra is established providing a naturaldecomposition of a Markovian open quantum system into its noiseless (decoherence-free) and irreducible (ergodic) components. This leads to a new characterisation of the structure of invariant states and a new method for finding decoherence-free subsystems and subspaces. Examples are presented to illustrate these results. 
Julien Deschamps, Franco Fagnola, Emanuela Sasso and Veronica Umanita'
math-ph math.MP