Xiong Yang,Jia-hua Xiao.Dynamics of quantum discord for a two-qubit system[J].Optoelectronics Letters,2013,9(1):69-72 Dynamics of quantum discord for a two-qubit system Author Name Affiliation E-mail Xiong Yang  Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Information Science, Hunan Normal University, Changsha, 410081, China  hhyxmm01@163.com  Jia-hua Xiao  Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Information Science, Hunan Normal University, Changsha, 410081, China    Abstract:       We study the dynamics of quantum discord of a two-qubit system coupled to a common structured reservoir at zero temperature. The conditions to maximize reservoir-induced quantum discord for the two-qubit system wiht an initially factorized state are derived. In particular, when the two qubits are placed in a lossy cavity, high values of quantum discord can be obtained in the dispersive regime, even in the bad-cavity limit. Finally, we show that under certain conditions, the quantum discord dynamics exhibits quantum beats. Hits: 4134 Download times: 179 View Full Text    Download reader