Dynamics of quantum discord for a two-qubit system

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2013,（1）
• 页码范围: 69-72
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-013-2289-y

摘要

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.