Synchronization schemes for continuous-variable quantum key distribution

Changjiang Liu; Yijia Zhao; Yichen Zhang; Ziyong Zheng; Song Yu

doi:10.1117/12.2264528

5 January 2017 Synchronization schemes for continuous-variable quantum key distribution

Changjiang Liu, Yijia Zhao, Yichen Zhang, Ziyong Zheng, Song Yu

Proceedings Volume 10244, International Conference on Optoelectronics and Microelectronics Technology and Application; 1024408 (2017) https://doi.org/10.1117/12.2264528
Event: International Conference on Optoelectronics and Microelectronics Technology and Application, 2016, Shanghai, China

Abstract

Clock synchronization is crucial for a practical continuous-variable quantum key distribution system to precisely get the measurement result. Three different synchronization schemes for continuous-variable quantum key distribution system are presented to demonstrate the optimal scheme. The performance of synchronization scheme is evaluated by measuring the excess noise which is the critical parameter for the continuous-variable quantum key distribution system. The experiment results show that distilling the synchronization signal from the local oscillator has the simplest physical implemention and superior effect of synchronization, but a stronger local oscillator is required. Transmitting synchronization signal and quantum signal in the same fiber by wave-length division multiplex is also a fine way to provide stable clock when we take no account of the phsical device and wave-length source.

Citation Download Citation

Changjiang Liu, Yijia Zhao, Yichen Zhang, Ziyong Zheng, and Song Yu "Synchronization schemes for continuous-variable quantum key distribution", Proc. SPIE 10244, International Conference on Optoelectronics and Microelectronics Technology and Application, 1024408 (5 January 2017); https://doi.org/10.1117/12.2264528

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