Experimental study of secure quantum key distribution with source and detection imperfections

• URL: http://arxiv.org/abs/2208.03894v1
• Date: Mon, 8 Aug 2022 03:31:20 GMT
• Title: Experimental study of secure quantum key distribution with source and detection imperfections
• Authors: Ye Chen, Chunfeng Huang, Zihao Chen, Wenjie He, Chengxian Zhang, Shihai Sun and Kejin Wei
• Abstract summary: The quantum key distribution (QKD) is a promising solution for future secure information and communication technology. This study reports a decoy-state BB84 QKD experiment that considers both source and detection imperfections.
• Score: 4.193177700786187
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum key distribution (QKD), guaranteed by the principle of quantum physics, is a promising solution for future secure information and communication technology. However, device imperfections compromise the security of real-life QKD systems, restricting the wide deployment of QKD. This study reports a decoy-state BB84 QKD experiment that considers both source and detection imperfections. In particular, we achieved a rigorous finite-key security bound over fiber links of up to 75 km by applying a systematic performance analysis. Furthermore, our study considers more device imperfections than most previous experiments, and the proposed theory can be extended to other discrete-variable QKD systems. These features constitute a crucial step toward securing QKD with imperfect practical devices.

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