Generalized Pauli channels and a class of non-Markovian quantum   evolution
  We analyze the quantum evolution represented by a time-dependent family of generalized Pauli channels. This evolution is provided by the random decoherence channels with respect to the maximal number of mutually unbiased bases. We derive the necessary and sufficient conditions for the vanishing back-flow of information. 
Dariusz Chru\'sci\'nski and Katarzyna Siudzi\'nska
quant-ph