论文标题
通过标准电信纤维在长距离内以高速率分发极化纠缠的光子对，
Distributing Polarization Entangled Photon Pairs with High Rate over Long Distance through Standard Telecommunication Fiber
论文作者
论文摘要
长距离的纠缠分布对于许多量子通信方案，例如量子传送，量子密钥分布的某些变体或量子互联网的实现至关重要。通过标准电信光纤分配纠缠对于量子距离较低脆弱性的量子密钥分布协议尤其重要。但是，到目前为止，长期通过光纤的纠缠分布只能通过适度的光子对速率来完成。在这项工作中，我们使用明亮的非脱位光子对源呈现超过50公里标准电信光纤的纠缠分布，配对速率超过10,000 s $^{ - 1} $。该来源的信号和惰轮波长分别针对光纤中的低分散和高效率分别针对单光雪兰二极管检测器进行了优化。由此产生的适度硬件需求和高度检测到的纠缠光子对率可以显着增强现有大都市纤维网络中基于纠缠的量子密钥分布。
Entanglement distribution over long distances is essential for many quantum communication schemes like quantum teleportation, some variants of quantum key distribution, or implementations of a quantum internet. Distributing entanglement through standard telecommunication fiber is particularly important for quantum key distribution protocols with low vulnerability over metropolitan distances. However, entanglement distribution over long distance through optical fiber so far could only be accomplished with moderate photon pair rates. In this work, we present entanglement distribution over 50km of standard telecommunication fiber with pair rate more than 10,000 s$^{-1}$ using a bright non-degenerate photon pair source. Signal and idler wavelengths of this source are optimized for low dispersion in optical fiber and high efficiency for single-photon avalanche diode detectors, respectively. The resulting modest hardware requirement and high rate of detected entangled photon pairs could significantly enhance practical entanglement-based quantum key distribution in existing metropolitan fiber networks.
