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Performance of phase-matching quantum key distribution based on wavelength division multiplexing technology |
| Haiqiang Ma(马海强)1,†,‡, Yanxin Han(韩雁鑫)1,†,§, Tianqi Dou(窦天琦)2, and Pengyun Li(李鹏云)3 |
1 School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2 China Telecom Research Institute, Beijing 102209, China;
3 China Academy of Electronics and Information Technology, China Electronic Technology Group Corporation, Beijing 100041, China |
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Abstract Quantum key distribution (QKD) generates information-theoretical secure keys between two parties based on the physical laws of quantum mechanics. The phase-matching (PM) QKD protocol allows the key rate to break the quantum channel secret key capacity limit without quantum repeaters, and the security of the protocol is demonstrated by using equivalent entanglement. In this paper, the wavelength division multiplexing (WDM) technique is applied to the PM-QKD protocol considering the effect of crosstalk noise on the secret key rate. The performance of PM-QKD protocol based on WDM with the influence of adjacent classical channels and Raman scattering is analyzed by numerical simulations to maximize the total secret key rate of the QKD, providing a reference for future implementations of QKD based on WDM techniques.
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Received: 09 March 2022
Revised: 23 April 2022
Accepted manuscript online: 12 May 2022
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PACS:
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03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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03.67.-a
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(Quantum information)
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| Fund: Project supported by the State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications) (Grant No. IPOC2021ZT10), the National Natural Science Foundation of China (Grant No. 11904333), the Fundamental Research Funds for the Central Universities (Grant No. 2019XDA02), and BUPT Innovation and Entrepreneurship Support Program (Grant No. 2022-YC-T051). |
Corresponding Authors:
Haiqiang Ma, Yanxin Han
E-mail: hqma@bupt.edu.cn;hyxin@bupt.edu.cn
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Cite this article:
Haiqiang Ma(马海强), Yanxin Han(韩雁鑫), Tianqi Dou(窦天琦), and Pengyun Li(李鹏云) Performance of phase-matching quantum key distribution based on wavelength division multiplexing technology 2023 Chin. Phys. B 32 020304
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