Abstract
We propose a four-state reference-frame-independent quantum key distribution (RFI-QKD) protocol with the heralded pair-coherent source (HPCS). We investigate the performance of the proposed protocol and simulation results show that our protocol can achieve a high key generation rate in long-distance transmission, taking source flaws and statistical fluctuations into consideration. Although fewer states are used, this protocol not only has a higher key generation rate at the same transmission distance but also a longer transmission distance with the same secure communication compared with the original six-state RFI-QKD protocol using the weak coherent source (WCS).
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This work has been supported by the Technology and Application of End-to-End Security Protection System for Power Internet of Things (No.5700-201916465a-0-0-00), and the Technology and Application of Quantum Cryptography and Communication (No.5246mi180004).
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Feng, B., Zhao, Z., Yang, S. et al. Four-state reference-frame-independent quantum key distribution using heralded pair-coherent sources with source flaws. Optoelectron. Lett. 17, 636–640 (2021). https://doi.org/10.1007/s11801-021-0197-0
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DOI: https://doi.org/10.1007/s11801-021-0197-0