Quantum coherence and correlation dynamics of two-qubit system in spin bath environment
Yang Hao1, 2, Qin Li-Guo2, 3, †, Tian Li-Jun1, ‡, Ma Hong-Yang4
       

The quantum discord QD as a function of time t, (a) QD1 (blue dashed line): c1 = 1, c2 = −0.6, c3 = 0.6, and QD2 (green solid line): c1 = 1, c2 = −0.4, c3 = 0.4. (b) The freezing phenomenon in panel (a) is magnified. Other parameters: γ/α = 3, N = 50, β = 1, g = 0.1.