Classical memoryless noise-induced maximally discordant mixed separable   steady states
  We have investigated the dynamics of quantum discord and entanglement for two qubits subject to independent global transverse and/or longitudinal memoryless noisy classical fields. Global transverse and/or longitudinal random fields are found to drive the system to maximally discordant mixed separable steady states for suitable initial conditions. Moreover, two independent noises in the system are found to enhance both the steady state randomness and quantum discord in the absence of entanglement for some initial states. 
Ferdi Altintas, Arzu Kurt, Resul Eryigit
quant-ph