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arXiv 1406.0180quant-ph
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么正量子动力学映射的非马氏性测度

A Measure of Non-Markovianity for Unital Quantum Dynamical Maps

S. Haseli, S. Salimi, A. S. Khorashad

摘要:

开放量子系统动力学研究的重要内容之一是系统与环境之间的信息交换。基于环境向系统反馈信息的特点,提出了一种检测单位动态映射非马尔可夫性的方法。该方法利用了冯诺伊曼熵在完全正的保迹单位映射下的非压缩性。因此,对于作为开放量子系统的单个量子比特的动力学,系统的密度矩阵本征值的时间导数的符号决定了单位量子动力学映射的非马尔可夫性。该措施的主要特点是使相应的计算和优化过程更简单。

英文摘要:

One of the most important topics in the study of the dynamics of open quantum system is information exchange between system and environment. Based on the features of a back-flow information from an environment to a system, an approach is provided to detect non-Markovianity for unital dynamical maps. The method takes advantage of non-contractive property of the von Neumann entropy under completely positive and trace preserving unital maps. Accordingly, for the dynamics of a single qubit as an open quantum system, the sign of the time-derivative of the density matrix eigenvalues of the system determines the non-Markovianity of unital quantum dynamical maps. The main characteristics of the measure is to make the corresponding calculations and optimization procedure simpler.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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