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arXiv 1903.03359quant-ph
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基于量化相干的非马尔可夫性检测:理论与实验

Detecting Non-Markovianity via Quantified Coherence: Theory and Experiments

Kang-Da Wu, Zhibo Hou, Guo-Yong Xiang, Chuan-Feng Li, Guang-Can Guo, Daoyi Dong, Franco Nori

摘要:

开放量子系统的动力学和量子资源的操纵都是量子物理学中的基本问题。本文研究了量子马尔可夫性与相干性的关系,为基于\textit{quantum-incoherent relative entropy of coherence}($\mathcal{QI}$ REC)的非马尔可夫性检测提供了一种有效的方法.从理论上证明了完全正整除性与$\mathcal{QI}$ REC的单调行为之间的关系,并通过全光实验证明了$\mathcal{QI}$ REC的单调行为与系统和辅助系统在马尔可夫和非马尔可夫演化下的纠缠度是一致的;而其他基于相干性的非马尔可夫信息载体甚至在马尔可夫过程中也违反单调性。此外,我们实验观察到,非马尔可夫性增强的能力,创造连贯的辅助。这是首次对$\mathcal{QI}$ REC的动力学行为与信息回流现象之间关系的实验研究。此外,我们的方法检测非马尔可夫性是适用于一般的量子演化。

英文摘要:

The dynamics of open quantum systems and manipulation of quantum resources are both of fundamental interest in quantum physics. Here, we investigate the relation between quantum Markovianity and coherence, providing an effective way for detecting non-Markovianity based on the \textit{quantum-incoherent relative entropy of coherence} ($\mathcal{QI}$ REC). We theoretically show the relation between completely positive (CP) divisibility and the monotonic behavior of the $\mathcal{QI}$ REC. Also we implement an all-optical experiment to demonstrate that the behavior of the $\mathcal{QI}$ REC is coincident with the entanglement shared between the system and the ancilla for both Markovian and non-Markovian evolution; while other coherence-based non-Markovian information carriers violate monotonicity, even in Markovian processes. Moreover, we experimentally observe that non-Markovianity enhances the ability of creating coherence on an ancilla. This is the first experimental study of the relation between dynamical behavior of the $\mathcal{QI}$ REC and the phenomenon of information backflow. Moreover, our method for detecting non-Markovianity is applicable to general quantum evolutions.

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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