论文标题
量子时间转移：一种实用的有损和嘈杂通道的方法
Quantum time transfer: a practical method for lossy and noisy channels
论文作者
论文摘要
远程量子网络的时序要求是由从独立来源和钟形测量中同步光子到达的必要性。因此，诸如重复率和脉搏持续时间之类的特征会影响启用量子网络任务所需的精度，例如传送和纠缠交换。已经提出了一些解决方案，利用经典的激光脉冲，频率梳子和两光源来源。在本文中，我们探讨了后一种方法的实用性，因为它基于量子现象，这使其自然而然地掩盖了，并可能具有量子安全。此外，它可以利用相对较低的性能量子量子源和检测设备，但即使在高损失和高噪声通道条件下，代表白天空间地球链路的高噪声通道条件，也提供了皮秒级的时序精度。因此，此方法与白天时空量子网络和/或在GPS拒绝环境中提供高精度安全时机有关。
Timing requirements for long-range quantum networking are driven by the necessity of synchronizing the arrival of photons, from independent sources, for Bell-state measurements. Thus, characteristics such as repetition rate and pulse duration influence the precision required to enable quantum networking tasks such as teleportation and entanglement swapping. Some solutions have been proposed utilizing classical laser pulses, frequency combs, and biphoton sources. In this article, we explore the utility of the latter method since it is based upon quantum phenomena, which makes it naturally covert, and potentially quantum secure. Furthermore, it can utilize relatively low performance quantum-photon sources and detection equipment, but provides picosecond-level timing precision even under high loss and high noise channel conditions representative of daytime space-Earth links. Therefore, this method is relevant for daytime space-Earth quantum networking and/or providing high-precision secure timing in GPS denied environments.
