论文标题
纠缠大都会距离分离的量子记忆
Entangling metropolitan-distance separated quantum memories
论文作者
论文摘要
Quantum Internet有望连接所有量子资源，并且将使应用程序远远超出了本地化场景。原型是纠缠且分开良好的量子记忆网络。以前的实现在远处有限。在本文中，我们报告了两个原子量子记忆之间建立了远程纠缠，直接在大都市区直接在12.5公里处分离。我们在一个节点中创建Atom-Photon纠缠，然后将光子发送到第二个节点进行存储。我们利用频率下转换和上转换，通过20.5 km的野外纤维进行低损坏的传播。通过检索光子，最终的记忆记忆纠缠被验证为90％的保真度。我们的实验铺平了在实际情况下研究量子网络应用的方式。
Quantum internet gives the promise of getting all quantum resources connected, and it will enable applications far beyond a localized scenario. A prototype is a network of quantum memories that are entangled and well separated. Previous realizations are limited in the distance. In this paper, we report the establishment of remote entanglement between two atomic quantum memories physically separated by 12.5 km directly in a metropolitan area. We create atom-photon entanglement in one node and send the photon to a second node for storage. We harness low-loss transmission through a field-deployed fiber of 20.5 km by making use of frequency down-conversion and up-conversion. The final memory-memory entanglement is verified to have a fidelity of 90% via retrieving to photons. Our experiment paves the way to study quantum network applications in a practical scenario.
