Li Chen-Long, Fu Yao, Liu Wen-Bo, Xie Yuan-Mei, Li Bing-Hong, Zhou Min-Gang, Yin Hua-Lei, Chen Zeng-Bing
Opt Lett. 2023 Mar 1;48(5):1244-1247. doi: 10.1364/OL.482287.
Quantum network applications such as distributed quantum computing and quantum secret sharing represent a promising future network equipped with quantum resources. Entanglement generation and distribution over long distances are critical and unavoidable when utilizing quantum technology in a fully connected network. The distribution of bipartite entanglement over long distances has seen some progress, while the distribution of multipartite entanglement over long distances remains unsolved. Here we report a two-dimensional quantum repeater protocol for the generation of multipartite entanglement over long distances with an all-photonic framework to fill this gap. The entanglement generation yield remains proportional to the transmission efficiency regardless of the number of network users and shows long transmission distance under various numbers of network users. With the improved efficiency and flexibility of extending the number of users, we anticipate that our protocol can work as a significant building block for quantum networks in the future.
诸如分布式量子计算和量子密钥共享等量子网络应用代表了一个配备量子资源的充满前景的未来网络。在全连接网络中利用量子技术时，长距离纠缠生成和分发至关重要且不可避免。两体纠缠的长距离分发已取得一些进展，而多体纠缠的长距离分发仍未解决。在此，我们报告一种二维量子中继器协议，用于在全光子框架下长距离生成多体纠缠，以填补这一空白。无论网络用户数量多少，纠缠生成产量都与传输效率成正比，并且在不同数量的网络用户下都显示出长传输距离。随着用户数量扩展效率和灵活性的提高，我们预计我们的协议未来可作为量子网络的重要构建模块。
