论文标题
$ x $ - 州的开放量子系统动力学：纠缠突然死亡和突然出生
Open quantum system dynamics of $X$-states: Entanglement sudden death and sudden birth
论文作者
论文摘要
$ x $状态的两个特定子类的分离起源，即最大非局部混合状态（MNMS）和最大纠缠的混合状态（MEMS）的物理系统，该物理系统由两个空间分离的与常见的真空浴室相互作用的物理系统进行了分析。观察到纠缠猝死现象（ESD）和纠缠猝死（ESB），但是对于两个光子相干性和单个光子相干状态而言，发现ESD和ESB的特征是不同的。研究了初始连贯性对基础纠缠动态的作用。此外，分析了不同环境噪声下MNMS和MEMS的纠缠动态，即相对于衰减和纠缠的衰变和复兴。可以观察到，单个光子相干状态对纠缠突然死亡更为强大，这表明该状态在开发技术实施量子信息处理任务中的可用性。
The origin of disentanglement for two specific sub-classes of $X$-states namely maximally nonlocal mixed states (MNMSs) and maximally entangled mixed states (MEMSs) is investigated analytically for a physical system consisting of two spatially separated qubits interacting with a common vacuum bath. The phenomena of entanglement sudden death (ESD) and the entanglement sudden birth (ESB) are observed, but the characteristics of ESD and ESB are found to be different for the case of two photon coherence and single photon coherence states. The role played by initial coherence for the underlying entanglement dynamics is investigated. Further, the entanglement dynamics of MNMSs and MEMSs under different environmental noises namely phase damping, amplitude damping and RTN noise with respect to the decay and revival of entanglement is analyzed. It's observed that the single photon coherence states are more robust against the sudden death of entanglement indicating the usability of such states in the development of technologies for the practical implementation of quantum information processing tasks.
