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Twin-Field Quantum Key Distribution Protocol Based on Wavelength-Division-Multiplexing Technology |
| Yanxin Han1, Zhongqi Sun1, Tianqi Dou2, Jipeng Wang1, Zhenhua Li1, Yuqing Huang1, Pengyun Li3, and Haiqiang Ma1* |
1School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
2China Telecom Research Institute, Beijing 102209, China
3China Academy of Electronics and Information Technology, China Electronic Technology Group Corporation, Beijing 100041, China
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| Cite this article: |
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Yanxin Han, Zhongqi Sun, Tianqi Dou et al 2022 Chin. Phys. Lett. 39 070301 |
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Abstract Quantum key distribution (QKD) generates information-theoretical secret keys between two parties based on the physical laws of quantum mechanics. Following the advancement in quantum communication networks, it becomes feasible and economical to combine QKD with classical optical communication through the same fiber using dense wavelength division multiplexing (DWDM) technology. This study proposes a detailed scheme of TF-QKD protocol with DWDM technology and analyzes its performance, considering the influence of quantum channel number and adjacent quantum crosstalk on the secret key rates. The simulation results show that the scheme further increases the secret key rate of TF-QKD and its variants. Therefore, this scheme provides a method for improving the secret key rate for practical quantum networks.
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Received: 14 April 2022
Published: 17 June 2022
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| PACS: |
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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