Abstract
Quantum key distribution (QKD) enables two authenticated parties to share secret key and can detect any attack that attempts to eavesdrop on the key. Information reconciliation is an important part of QKD. The secret key between two communication parties can be extracted by correcting errors caused by quantum channel noise. To improve the efficiency of information reconciliation and secret key rate, this paper proposes an improved multidimensional information reconciliation protocol based on systematic polar codes. Moreover, we have demonstrated and analyzed the security of the proposed protocol. Simulation results show that the proposed protocol achieves the reconciliation efficiency of around 97% in a wider range of signal-to-noise ratio range \(\left( 0,0.18\right) \) and a quite low frame error rate (\(P_e<0.001\)). As a result, the improved multidimensional information reconciliation protocol based on the systematic polar codes can achieve a longer quantum communication transmission distance.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (Grant No. 61601403), the Young Backbone Teachers Project of Yangzhou University, the National Natural Science Foundation of Shanghai (Grant No. 20ZR1400700), and the Shanghai Municipal Science and Technology Major Project (Grant No. 2019SHZDZX01).
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Zhang, M., Dou, Y., Huang, Y. et al. Improved information reconciliation with systematic polar codes for continuous variable quantum key distribution. Quantum Inf Process 20, 327 (2021). https://doi.org/10.1007/s11128-021-03265-z
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DOI: https://doi.org/10.1007/s11128-021-03265-z