马尔可夫过程
量子不和谐
量子
统计物理学
物理
量子力学
量子纠缠
数学
统计
作者
Bo Wang,Zhenyu Xu,Zeqian Chen,Mang Feng
标识
DOI:10.1103/physreva.81.014101
摘要
We study the non-Markovian effect on the dynamics of the quantum discord by exactly solving a model consisting of two independent qubits subject to two zero-temperature non-Markovian reservoirs, respectively. Considering the two qubits initially prepared in Bell-like or extended Werner-like states, we show that there is no occurrence of the sudden death, but only instantaneous disappearance of the quantum discord at some time points, in comparison to the entanglement sudden death in the same range of the parameters of interest. It implies that the quantum discord is more useful than the entanglement to describe quantum correlation involved in quantum systems.
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