论文标题
信息回流可能不会指示量子内存
Information backflow may not indicate quantum memory
论文作者
论文摘要
我们分析了最近的量子马尔可维亚性的方法，以及它们如何与量子记忆的正确定义相关。我们指出，信息回流的众所周知标准可能无法正确报告记忆的特征，该特征错误地表明了其量子性。因此，作为对众所周知的标准的补充，我们提出了几个基本动力图的概念。这种类型的地图不会增加在给定的基础上测量冯·诺伊曼无法区分的状态的区分性。这些概念和凸度使我们能够在没有量子记忆的情况下定义一般的过程类别。最后，我们从量子信息回流的见证人的新概念方面对最直观的类别提供了实际表征。
We analyze recent approaches to quantum Markovianity and how they relate to the proper definition of quantum memory. We point out that the well-known criterion of information backflow may not correctly report character of the memory falsely signaling its quantumness. Therefore, as a complement to the well-known criteria, we propose several concepts of elementary dynamical maps. Maps of this type do not increase distinguishability of states which are indistinguishable by von Neumann measurements in a given basis. Those notions and convexity allows us to define general classes of processes without quantum memory in a weak and strong sense. Finally, we provide a practical characterization of the most intuitive class in terms of the new concept of witness of quantum information backflow.
