论文标题
基于操作纠缠的量子键分布超过50 km的实线光纤
Operational entanglement-based quantum key distribution over 50 km of real-field optical fibres
论文作者
论文摘要
我们提出了基于能源时间纠缠的实际字段量子键分布链接。通过总距离为50 \，公里的光纤在NICE城市连接了三个节点。我们已经实施了高质量的能源纠缠光子对的来源，并积极稳定分析仪来投射量子状态，这与不需要任何专用通道的端站时钟的创新远程同步方法有关。该系统与ITU 100 \ GHz标准电信网格兼容，通过该电信网格，通过该电信，通过该网络，可以获得40 \，每对通道KBPS的原始密钥速率。治疗后软件执行所有必要的后处理程序，以实时建立秘密密钥。所有这些嵌入式系统并达到的性能使该网络成为第一个完全基于基于纠缠的大都市量子网络，该网络将在实际领域实现。
We present a real field quantum key distribution link based on energy-time entanglement. Three nodes are connected over the city of Nice by means of optical fibers with a total distance of 50\,km. We have implemented a high-quality source of energy-time entangled photon pairs and actively stabilized analysers to project the quantum states, associated with an innovative remote synchronization method of the end stations' clocks which does not require any dedicated channel. The system is compatible with the ITU 100\,GHz standard telecom-grid, through which a raw key rate of 40\,kbps per pair of channels is obtained. A post-treatment software performs all the necessary post-processing procedures enabling to establish secret keys in real time. All of those embedded systems and achieved performance make this network the first fully operational entanglement based metropolitan quantum network to be implemented in real field.
