论文标题
开放量子系统的有条件共同信息的经典和量子部分
Classical and quantum parts of conditional mutual information for open quantum systems
论文作者
论文摘要
我们研究了开放量子系统的``系统 - 环境 - ancilla''设置的条件互信息的经典，经典量子和量子部分。我们通过概括量子状态相关性的分类来执行条件共同信息的分离。通过将无本地广播定理调整为此设置的条件相互信息的经典部分的条件是给出的，而有条件相互信息的经典量词部分的条件是通过考虑多明位量子不符号和无非上端 - broadcasting定理来获得的。对于条件相互信息的量子部分，我们进一步概括了通过状态扩展与多代设置的量子不一调对纠缠的表征，从而导致有条件互信息的广义Koashi-Winter-Winter-Winter-Winter-type一夫一妻制平等。我们的结果明确地依赖环境的扩展，这对于研究开放量子系统的量子非马克维亚性的不同环境贡献很有用。
We study the classical, classical-quantum, and quantum parts of conditional mutual information in the ``system-environment-ancilla'' setting of open quantum systems. We perform the separation of conditional mutual information by generalizing the classification of correlations of quantum states. The condition for identifying the classical part of conditional mutual information is given by adapting the no-local-broadcasting theorem to this setting, while the condition for classical-quantum part of conditional mutual information is obtained by considering the multipartite quantum discord and the no-unilocal-broadcasting theorem. For the quantum part of conditional mutual information, we further generalize the characterization of entanglement by quantum discord of state extensions to the multipatite setting, so as to derive a generalized Koashi-Winter-type monogamy equality for conditional mutual information. Our results have explicit dependence on the extensions of environment, which are useful for studying different environmental contributions to the quantum non-Markovianity of open quantum systems.
