Practical Security of High-Dimensional Quantum Key Distribution with Intensity Modulator Extinction
Yang Wang,
Ge-Hai Du,
Yang-Bin Xu,
Chun Zhou,
Mu-Sheng Jiang,
Hong-Wei Li,
Wan-Su Bao
Affiliations
Yang Wang
National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Ge-Hai Du
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Yang-Bin Xu
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Chun Zhou
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Mu-Sheng Jiang
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Hong-Wei Li
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Wan-Su Bao
Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China
Quantum key distribution (QKD) has attracted much attention due to its unconditional security. High-dimensional quantum key distribution (HD-QKD) is a brand-new type of QKD protocol that has many excellent advantages. Nonetheless, practical imperfections in realistic devices that are not considered in the theoretical security proof may have an impact on the practical security of realistic HD-QKD systems. In this paper, we research the influence of a realistic intensity modulator on the practical security of HD-QKD systems with the decoy-state method and finite-key effects. We demonstrate that there is a certain impact in the secret key rate and the transmission distance when taking practical factors into security analysis.
