论文标题
实现具有集成光子学的基于纠缠的多用户量子网络
Realizing an entanglement-based multi-user quantum network with integrated photonics
论文作者
论文摘要
量子网络促进了不同用户之间信息的安全传输。以可扩展和有效的方式建立多个用户之间的通信链接对于实现大规模量子网络很重要。在这里，我们基于集成的氮化硅微环谐振器开发了基于能源纠缠的密度波长多路复用网络，该网络提供了较宽的频率跨度（至少覆盖整个C波段）和狭窄的带宽模式（〜650MHz）。选择六对光子以形成完全且同时连接的四用户量子网络。观察到的量子干扰可见性远高于所有用户的经典限制。每对用户执行量子密钥分布的BBM92协议。我们的结果为实现具有集成光子体系结构的大规模量子网络铺平了道路。
Quantum network facilitates the secure transmission of information between different users. Establishing communication links among multiple users in a scalable and efficient way is important for realizing a large-scale quantum network. Here we develop an energy-time entanglement-based dense wavelength division multiplexed network based on an integrated silicon nitride micro-ring resonator, which offers a wide frequency span (covering at least the entire C-band) and narrow bandwidth modes (~ 650MHz). Six pairs of photons are selected to form a fully and simultaneously connected four-user quantum network. The observed quantum interference visibilities are well above the classical limits among all users. Each pair of users perform the BBM92 protocol for quantum key distribution. Our results pave the way for realizing large-scale quantum networks with integrated photonic architecture.
