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Volume 10
Issue 21
10.3390/app10217770
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Article

Lengthening Transmission Distance of Continuous Variable Quantum Key Distribution with Discrete Modulation through Photon Catalyzing

by
Zhengchun Zhou
1,†,
Shanhua Zou
1,2,*,†,
Tongcheng Huang
1,* and
Ying Guo
3,*
1
College of Information Engineering, Shaoyang University, Shaoyang 422000, China
2
Jiangsu Key Construction Laboratory of IoT Application Technology, Taihu University, Wuxi 214064, China
3
School of Automation, Central South University, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Appl. Sci. 2020, 10(21), 7770; https://doi.org/10.3390/app10217770
Submission received: 18 September 2020 / Revised: 26 October 2020 / Accepted: 26 October 2020 / Published: 3 November 2020
(This article belongs to the Special Issue Quantum Communications and Quantum Networks)
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Abstract

Establishing global secure networks is a potential implementation of continuous-variable quantum key distribution (CVQKD) but it is also challenged with respect to long-distance transmission. The discrete modulation (DM) can make up for the shortage of transmission distance in that it has a unique advantage against all side-channel attacks; however, its further performance improvement requires source preparation in the presence of noise and loss. Here, we consider the effects of photon catalysis (PC) on the DM-involved source preparation for improving the transmission distance. We address a zero-photon-catalysis (ZPC)-based source preparation for enhancing the DM–CVQKD system. The statistical fluctuation is taken into account for the practical security analysis. Numerical simulations show that the ZPC-based source preparation can not only achieve the long-distance transmission, but also contributes to the reasonable increase of the secret key rate.
Keywords: continuous-variable; quantum key distribution; non-gaussian operation; quantum communications continuous-variable; quantum key distribution; non-gaussian operation; quantum communications

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MDPI and ACS Style

Zhou, Z.; Zou, S.; Huang, T.; Guo, Y. Lengthening Transmission Distance of Continuous Variable Quantum Key Distribution with Discrete Modulation through Photon Catalyzing. Appl. Sci. 2020, 10, 7770. https://doi.org/10.3390/app10217770

AMA Style

Zhou Z, Zou S, Huang T, Guo Y. Lengthening Transmission Distance of Continuous Variable Quantum Key Distribution with Discrete Modulation through Photon Catalyzing. Applied Sciences. 2020; 10(21):7770. https://doi.org/10.3390/app10217770

Chicago/Turabian Style

Zhou, Zhengchun, Shanhua Zou, Tongcheng Huang, and Ying Guo. 2020. "Lengthening Transmission Distance of Continuous Variable Quantum Key Distribution with Discrete Modulation through Photon Catalyzing" Applied Sciences 10, no. 21: 7770. https://doi.org/10.3390/app10217770

APA Style

Zhou, Z., Zou, S., Huang, T., & Guo, Y. (2020). Lengthening Transmission Distance of Continuous Variable Quantum Key Distribution with Discrete Modulation through Photon Catalyzing. Applied Sciences, 10(21), 7770. https://doi.org/10.3390/app10217770

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