论文标题
带有交叉光纤空腔的量子网络节点
A Quantum Network Node with Crossed Optical Fibre Cavities
论文作者
论文摘要
量子网络为解决有关纠缠的开放问题提供了独特的可能性，并承诺创新的应用程序，从安全通信到可扩展计算。尽管两个通过单个通道结合的两个量子节点足以适合两方之间的基本量子通信任务，但功能齐全的大规模量子网络需要具有多重连接节点的类似Web的架构。网络节点和通道之间的有效接口可以通过光腔实现。使用两个耦合到一个原子的光纤腔，我们在这里实现了一个连接到两个量子通道的量子网络节点。它充当被动，预示和高保真的量子记忆，既不需要振幅和相关控制场也不需要易于错误的反馈回路。我们的节点很强，可以自然地适合基于纤维的网络，可以缩放到更多的空腔中，因此为量子互联网提供了清晰的视角，包括Qubit控制的量子开关，路由器和中继器。
Quantum networks provide unique possibilities for resolving open questions on entanglement and promise innovative applications ranging from secure communication to scalable computation. While two quantum nodes coupled by a single channel are adequate for basic quantum communication tasks between two parties, fully functional large-scale quantum networks require a web-like architecture with multiply connected nodes. Efficient interfaces between network nodes and channels can be implemented with optical cavities. Using two optical fibre cavities coupled to one atom, we here realise a quantum network node that connects to two quantum channels. It functions as a passive, heralded and high-fidelity quantum memory that requires neither amplitude- and phase-critical control fields nor error-prone feedback loops. Our node is robust, fits naturally into larger fibre-based networks, can be scaled to more cavities, and thus provides clear perspectives for a quantum internet including qubit controlled quantum switches, routers, and repeaters.
