论文标题
在混合空间和纤维链路上的量子双向时间传输
Quantum two-way time transfer over a hybrid free-space and fiber link
论文作者
论文摘要
由于量子双向时间传输的优越性（Q-TWTT）在光纤链接上令人信服地证明，其在自由空间链路上的实现成为迫切需要远程时间传输扩展到跨陆大陆距离的。在本文中，据报道，据报道，在2 km长的湍流自由空间和7 km长的田间纤维的杂种连接上进行了第一个Q-TWTT实验演示。尽管大量超过25 dB和大气湍流损失，但在时间偏差方面，可靠的时间传递性能持续了一整夜，远低于1 picsecond。这项成就表明了在空间接地集成的光学链接中量子增强的时间传输的良好可行性，并很好地证明了Q-TWTT在比较和同步的最先进的空间微波原子时钟方面的能力。
As the superiority of quantum two-way time transfer (Q-TWTT) has been proved convincingly over fiber links, its implementation on free-space links becomes an urgent need for remote time transfer expanding to the transcontinental distance. In this paper, the first Q-TWTT experimental demonstration over a hybrid link of 2 km-long turbulent free space and 7 km-long field fiber is reported. Despite the significant loss of more than 25 dB and atmospheric turbulence, reliable time transfer performance lasting for overnights has been realized with time stability in terms of time deviation far below 1 picosecond. This achievement shows the good feasibility of quantum-enhanced time transfer in the space-ground integrated optical links and nicely certifies the capability of Q-TWTT in comparing and synchronizing the state-of-the-art space microwave atomic clocks.
