论文标题
用钟形对创建和提炼多方GHz状态的协议
Protocols for creating and distilling multipartite GHZ states with Bell pairs
论文作者
论文摘要
高质量的Greenberger-Horne-Zeilinger（GHz）州的分布是许多量子通信任务的核心，从扩展望远镜的基线到秘密共享。它们在分布式量子计算的误差校正体系结构中也起着重要作用，可以利用铃铛对创建纠缠量子计算机网络。我们研究了GHz状态的创建和蒸馏与量子网络相对于非完美的铃铛对。特别是，我们引入了一种启发式动态编程算法，以优化创建和净化GHz状态的大量协议。所有考虑使用的所有协议都基于基于目标状态的非本地稳定器操作员（即GHz状态）的测量值的共同框架，在该框架中，每个非本地测量都将消耗另一个（不完美的）纠缠状态作为资源。新协议的表现优于场景的先前建议，而无需矫正和本地门噪声。此外，可以将算法应用于任何数量的各方和任何涉及的纠缠对的协议。
The distribution of high-quality Greenberger-Horne-Zeilinger (GHZ) states is at the heart of many quantum communication tasks, ranging from extending the baseline of telescopes to secret sharing. They also play an important role in error-correction architectures for distributed quantum computation, where Bell pairs can be leveraged to create an entangled network of quantum computers. We investigate the creation and distillation of GHZ states out of non-perfect Bell pairs over quantum networks. In particular, we introduce a heuristic dynamic programming algorithm to optimize over a large class of protocols that create and purify GHZ states. All protocols considered use a common framework based on measurements of non-local stabilizer operators of the target state (i.e., the GHZ state), where each non-local measurement consumes another (non-perfect) entangled state as a resource. The new protocols outperform previous proposals for scenarios without decoherence and local gate noise. Furthermore, the algorithms can be applied for finding protocols for any number of parties and any number of entangled pairs involved.
