基于二阶量子相干的定位与时钟同步方法

纠缠态的光量子对经过两个不同的路径到达一个HOM干涉仪,进行二阶量子相干,可以对两条路径传的信号到达时间差进行飞秒级的精确测量。在这个原理上构建量子定位系统,在4个通道上同时进行二阶量子相干测量,可以精确确定用户在一个坐标系中的空间和时间4维坐标。本文介绍了基于纠缠量子对二阶量子相干的定位和时钟同步的基本原理以及星基量子定位系统的初步方案。

Positioning and Clock Synchronization Based on Second-Order Quantum Coherence

Entangled photon reach a HOM interferometer through two different paths, and second-order coherence procedure at HOM interferometer can performance a measurement with accuracy of several femtoseconds of the time difference of arrival between the two paths. Based on this principle, a quantum positioning system is constructed. With the simultaneous second-order quantum coherence measurements in four channels, the four dimensional space-time coordinates of user in a coordinate system could be accurate defined. The principle of positioning and clock synchronization based on second-order quantum coherence of entangles photon pairs and a preliminary scheme of satellite-based quantum positioning system is presented in this paper.