Quantum discord dynamics in the presence of initial system–cavity correlations
Ying-Jie Zhang, Xu‐Bo Zou, Yun‐Jie Xia, Guang‐Can Guo · Journal of Physics B Atomic Molecular and Optical Physics · 2011
We analyze the roles of initial correlations between the two-qubit system and a dissipative cavity on quantum discord dynamics of two qubits. Considering two initial system-cavity states, we show that the initial system-cavity correlations not only can initially increase the two-qubit quantum discord but also would lead to a larger long-time quantum discord asymptotic value. Moreover, quantum discord due to initial correlations is more robust than the case of the initial factorized state. Finally, we show the initial correlations' importance for dynamics behaviors of mutual information and classical correlation.