WANG Lei1, WANG Zhao-hua1, LI Bai-hong1, LI Jun2, LI Yong-fang1,*
(1 College of physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China; 2 National Lab of Radar Signal Processing, Xidian University, Xi′an 710071, Shaanxi, China)
Abstract:
Based on the quantum feature and the quantum coherent principle of the entangled photon pairs produced with the spontaneous parametric down-conversion, a measurement method of the distant clock synchronization is studied. This method can not only be used in studying the distant clock synchronization and the quantum positioning, but is useful in measuring the time difference of a pair of entangled photon passing the nonlinear crystal. The results show that the shorter the time difference is, the better the coherence and synchronization of the two probed events are.
KeyWords:
distant clock synchronization; spontaneous parametric down-conversion; entanglement photon; quantum coherent principle
