论文标题
使用中央量子网节点分析多部分纠缠分布
Analysis of Multipartite Entanglement Distribution using a Central Quantum-Network Node
论文作者
论文摘要
我们研究通过使用中央节点在量子网络中分布多部分纠缠状态的性能（速率和保真度）。具体而言，我们考虑了首先在中央节点本地制备的多部分纠缠状态的方案，然后通过量子传送传输到网络的末端节点。作为我们的第一个结果，我们介绍了特定的多部分纠缠状态，即Greenberger-Horne-Zeilinger（GHz）状态的速率和忠诚度的领先分析表达式和下限。我们对保真度的分析表达式准确地解释了单个量子位遇到的时间相关的去极化噪声，同时存储在量子记忆中，这是使用蒙特卡洛模拟进行了验证的。作为我们的第二个结果，我们将中央节点是纠缠开关的情况进行比较，而GHz状态是由End Nodes以分布式方式创建的。除了这两个结果之外，我们概述了如何使用钻石中的被困离子或氮呈现中心对基于传送的方案进行物理实施。
We study the performance (rate and fidelity) of distributing multipartite entangled states in a quantum network through the use of a central node. Specifically, we consider the scenario where the multipartite entangled state is first prepared locally at a central node, and then transmitted to the end nodes of the network through quantum teleportation. As our first result, we present leading-order analytical expressions and lower bounds for both the rate and fidelity at which a specific class of multipartite entangled states, namely Greenberger-Horne-Zeilinger (GHZ) states, are distributed. Our analytical expressions for the fidelity accurately account for time-dependent depolarizing noise encountered by individual quantum bits while stored in quantum memory, as verified using Monte Carlo simulations. As our second result, we compare the performance to the case where the central node is an entanglement switch and the GHZ state is created by the end nodes in a distributed fashion. Apart from these two results, we outline how the teleportation-based scheme could be physically implemented using trapped ions or nitrogen-vacancy centers in diamond.
