Acta Optica Sinica, Volume. 40, Issue 5, 0527001(2020)
Research on Scheme of Enhancing Loran C Chain Time Synchronization by Using Continuous Variable Entanglement Swapping
At present, all stations in the Loran C chain are limited by the accumulation errors of atomic clock and the measurement accuracy of radio signal, and there has not been achieved high-precision time synchronization so far. Based on the continuous variable entanglement swapping method and the delay device located at the main and auxiliary stations, the phase difference information of the orthogonal components of the entangled light field can be detected with high precision to obtain synchronization time difference information of the main station and the multiple of secondary stations. Through theoretical derivation and simulation analysis, it is concluded that the synchronization accuracy of multiple stations can reach the picosecond level. By analyzing the security of the inter-station synchronous quantum channel, it is concluded that any external eavesdropping behavior will lead to the raise of bit error rate of the main and auxiliary stations.
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Chao Chen, Dewei Wu, Chunyan Yang, Qiang Miao, Tianli Wei. Research on Scheme of Enhancing Loran C Chain Time Synchronization by Using Continuous Variable Entanglement Swapping[J]. Acta Optica Sinica, 2020, 40(5): 0527001
Category: Quantum Optics
Received: Sep. 17, 2019
Accepted: Nov. 19, 2019
Published Online: Mar. 10, 2020
The Author Email: Chen Chao (1553660157@qq.com), Wu Dewei (wudewei74609@126.com)