论文标题
时钟与脉冲单光子源同步
Clock synchronization with pulsed single photon sources
论文作者
论文摘要
光子量子技术需要精确的，时间分辨的光电检测事件鉴定。在具有空间分离和漂移时间参考的分布式量子网络中，高精度特别具有挑战性。在这里，我们基于使用单光子进行时间传输的最新进展，并采用并量化了旨在脉动单光子源的快速后处理方案。我们达到平均均方根同步抖动为3.0 PS，稳定性与具有超稳时钟的系统（就Allan时偏差而言，在1秒集成时间为54 PS）。我们的算法补偿了晶体振荡器的实质时钟瑕疵，对于低信号情景而言是优越的，并且允许量子通信网络同时传输数据至时间传输。
Photonic quantum technology requires precise, time-resolved identification of photodetection events. In distributed quantum networks with spatially separated and drifting time references, achieving high precision is particularly challenging. Here we build on recent advances of using single-photons for time transfer and employ and quantify a fast postprocessing scheme designed to pulsed single-photon sources. We achieve an average root mean square synchronization jitter of 3.0 ps and a stability comparable to systems with ultra-stable clocks (54 ps at 1 second integration time, in terms of Allan time deviation). Our algorithm compensates substantial clock imperfections from crystal oscillators, is superior for low signal scenarios, and allows the quantum communication networks to transmit data simultaneously to time transfer.
