Quantum Correlations Evolution Asymmetry in Quantum Channels

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2017,（3）
• 页码范围: 267-272
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0253-6102/67/3/267

摘要

It was demonstrated that the entanglement evolution of a specially designed quantum state in the bistochastic channel is asymmetric.In this work,we generalize the study of the quantum correlations,including entanglement and quantum discord,evolution asymmetry to various quantum channels.We found that the asymmetry of entanglement and quantum discord only occurs in some special quantum channels,and the behavior of the entanglement evolution may be quite different from the behavior of the quantum discord evolution.To quantum entanglement,in some channels it decreases monotonously with the increase of the quantum channel intensity.In some other channels,when we increase the intensity of the quantum channel,it decreases at first,then keeps zero for some time,and then rises up.To quantum discord,the evolution becomes more complex and you may find that it evolutes unsmoothly at some points.These results illustrate the strong dependence of the quantum correlations evolution on the property of the quantum channels.