Various Correlations in Anisotropic Heisenberg XYZ Model with   Dzyaloshinski-Moriya Interaction
  Various thermal correlations as well as the effect of intrinsic decoherence on the correlations are studied in a two-qubit Heisenberg XYZ spin chain with the Dzyaloshinski--Moriya (DM) interaction along the z direction, i.e. Dz. It is found that tunable parameter Dz may play a constructive role on the concurrence (C), classical correlation (CC) and quantum discord (QD) in thermal equilibrium while it plays a destructive role on the correlations in the intrinsic decoherence case. The entanglement and quantum discord exhibit collapse and revival under the phase decoherence. With a proper combination of the system parameters, the correlations can effectively be kept at high steady state values despite the intrinsic decoherence. 
Mamtimin Tursun, Ahmad Abliz, Rabigul Mamtimin, Ablimt Abliz, Pan   Pan-Qiao
quant-ph