标题： 用于量子网络会议密钥传播的生成树打包协议 显示英文标题

标题： Spanning-tree-packing protocol for conference key propagation in quantum networks

摘要： 我们研究由两两量子密钥分发（QKD）链路连接的用户网络。利用这些两两秘密密钥和公开的经典通信，用户希望以最大速率生成一个公共（会议）秘密密钥。我们提出了一种基于生成树打包（图论中的一个已知问题）的算法，并证明了其最优性。该算法能够在任意拓扑结构的现代量子网络中实现最优的会议密钥生成。此外，我们还讨论了它如何指导网络设计中新双部链路的最优放置。 显示英文摘要

摘要： We consider a network of users connected by pairwise quantum key distribution (QKD) links. Using these pairwise secret keys and public classical communication, the users want to generate a common (conference) secret key at the maximal rate. We propose an algorithm based on spanning tree packing (a known problem in graph theory) and prove its optimality. This algorithm enables optimal conference key generation in modern quantum networks of arbitrary topology. Additionally, we discuss how it can guide the optimal placement of new bipartite links in the network design.