Quantum discord in the three-spin XXZ chain with Dzyaloshinskii-Moriya interaction

The quantum discord (QD) of a three-qubit Heisenberg XXZ system with the Dzyaloshinskii-Moriya (DM) interaction parameter is investigated, and the three-qubit QD under Ornstein-Uhlenbeck noise is calculated. We find that both DM interaction parameter D (z) and anisotropic parameter J (z) can increase QD and entanglement but D (z) is a more efficient parameter in the antiferromagnetic case. We observe a complex range of QD with the change of D (z) and a sudden change of QD with the variation of J (z) in the ferromagnetic case. We show that the decrease durations of both QD and entanglement can be prolonged by increasing DM interaction and reducing noise bandwidth gamma in the evolutionary process.