中国物理B ›› 2025, Vol. 34 ›› Issue (2): 20302-020302.doi: 10.1088/1674-1056/ad99cb
所属专题： SPECIAL TOPIC — Quantum communication and quantum network
Improved reference-frame-independent quantum key distribution with intensity fluctuations
Zi-Qi Chen(陈子骐)1,2, Hao-Bing Sun(孙昊冰)1,2, Ming-Shuo Sun(孙铭烁)1,2, and Qin Wang(王琴)1,2,†
- 1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
Improved reference-frame-independent quantum key distribution with intensity fluctuations
Zi-Qi Chen(陈子骐)1,2, Hao-Bing Sun(孙昊冰)1,2, Ming-Shuo Sun(孙铭烁)1,2, and Qin Wang(王琴)1,2,†
- 1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
摘要： Reference-frame-independent quantum key distribution (RFI-QKD) can avoid real-time calibration operation of reference frames and improve the efficiency of the communication process. However, due to imperfections of optical devices, there will inevitably exist intensity fluctuations in the source side of the QKD system, which will affect the final secure key rate. To reduce the influence of intensity fluctuations, an improved 3-intensity RFI-QKD scheme is proposed in this paper. After considering statistical fluctuations and implementing global parameter optimization, we conduct corresponding simulation analysis. The results show that our present work can present both higher key rate and a farther transmission distance than the standard method.
中图分类号: (Quantum cryptography and communication security)
- 03.67.Dd