Study On Positioning Key Technologies With Quantum Correlation

Positioning technology is widely used in all aspects of national economy andmilitary security, making great contribution to scientifc progress and social de-velopment. Traditional positioning technology is based on classical theories, theaccuracy is limited by shot noise limit and cannot be further improved. Quantumcorrelation positioning technology is a novel technology in the feld of navigationand positioning and has great research values and potential applications. Be-cause of very high positioning accuracy and good security, it has attracted greatconcerns of research scholars all around the world since it was proposed.At the present stage, correlation features of entangled photon pairs have beenused in quantum positioning systems and other precise measurement researches.The schemes based on correlation features of entangled photon pairs have beenproved to have higher measurement accuracy, some can even approach Heisenberglimitation. But because of the difculties in the preparation of entangled photons,the practicality of these schemes above are limited to a certain extent.This dissertation focuses on the theoretical and experimental study of sev-eral key technologies in quantum correlation positioning, covering clock synchro-nization technology, ranging technology and inter-satellite link technology. Thedetailed contents include:1. Propose a clock synchronization scheme based on the second order corre-lation feature of thermal light. In recent years, large amount of theoreticaland experimental researches based on correlated optics show that thermalstate has similar second order correlation features as two-photon entan-gled state. Using thermal light can imitate entangled light to implementsimilar correlation experiments such as ghost imaging, ghost interferenceand sub-wavelength interference. So in this dissertation, we design a novel high-precision clock synchronization scheme by using the correlation fea-tures of thermal light combining with conveyor belt synchronization princi-ple,analyze and compare the four diferent implementations of this scheme,and discuss two key parameters: accuracy and update rate.2. Propose a distance measurement scheme based on the second order corre-lation feature of thermal light. Because of the good features of thermallight second order coherence function, in this dissertation, a distance mea-surement scheme with the advantages of high-precision, no measuring deadzone and good anti-jamming has been designed.On this basis, a thermallight correlated distance measurement experimental platform has been im-plemented, and a proof of principle experiment has been done, which lays agood foundation for further implementation of outdoor long-distance ther-mal light correlated distance measurement.3. Discuss the inter-satellite link technology based on the quantum correlation.In this dissertation, the defnition of inter-satellite link based on quantumcorrelation has been proposed, and the frequency spectrum as well as thesuperiorities of inter-satellite link based on quantum correlation have beendiscussed. The establishment of the basic quantum inter-satellite link hasbeen described, and the relationship between the channel loss and the cor-relation degree of the link has been analyzed. Analogy with open systeminterconnection, the network structure of quantum inter-satellite link hasbeen defned.