论文标题
全局相关性和本地信息流以可控的非马克维亚开放量子动态流动
Global Correlation and Local Information Flows in Controllable Non-Markovian Open Quantum Dynamics
论文作者
论文摘要
在研究非马克维亚开放量子动态的完全可控的实验平台中，我们表明可以从全球和本地方面研究非马克维亚性。通过混合随机统一动力学，我们演示了非马克维亚和马尔可夫开放量子动力学。从全局的角度来看，通过调整基本频率，我们证明了通过量子互信息（QMI）衡量的马尔可维亚性向非马克维亚性的过渡。在马尔可夫开放量子过程中，QMI单调衰减，而它可能会在非马克维亚过程中暂时上升。但是，在某些情况下，在全球范围内研究开放量子动力学的非马克维亚性不足。作为必不可少的补充，我们进一步利用量子渔民信息（QFI）流以局部表征不同通道中的非马克维亚性。我们证明，QMI与QFI流相结合，能够测量多通道开放量子动力学的非马克维亚性。
In a fully-controllable experiment platform for studying non-Markovian open quantum dynamics, we show that the non-Markovianity could be investigated from the global and local aspects. By mixing random unitary dynamics, we demonstrate non-Markovian and Markovian open quantum dynamics. From the global point of view, by tuning the base frequency we demonstrate the transition from the Markovianity to the non-Markovianity as measured by the quantum mutual information (QMI). In a Markovian open quantum process, the QMI decays monotonically, while it may rise temporarily in a non-Markovian process. However, under some circumstances, it is not sufficient to globally investigate the non-Markovianity of the open quantum dynamics. As an essential supplement, we further utilize the quantum Fisher information (QFI) flow to locally characterize the non-Markovianity in different channels. We demonstrate that the QMI in combination with the QFI flow are capable of measuring the non-Markovianity for a multi-channel open quantum dynamics.
