Practical Security of High-Dimensional Quantum Key Distribution with Intensity Modulator Extinction |
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| Authors: | Yang Wang Ge-Hai Du Yang-Bin Xu Chun Zhou Mu-Sheng Jiang Hong-Wei Li Wan-Su Bao |
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| Institution: | 1.National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;2.Henan Key Laboratory of Quantum Information and Cryptography, SSF IEU, Zhengzhou 450001, China; (G.-H.D.); (Y.-B.X.); (C.Z.); (M.-S.J.); (H.-W.L.); (W.-S.B.);3.Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | 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. |
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| Keywords: | quantum key distribution high-dimensional practical security intensity modulator extinction |
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