1. High-efficiency reconciliation for continuous variable quantum key distribution
- Author
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Shen-Shen Yang, Yongmin Li, and Zeng-Liang Bai
- Subjects
Physics and Astronomy (miscellaneous) ,Computer science ,Gaussian ,General Engineering ,General Physics and Astronomy ,Data_CODINGANDINFORMATIONTHEORY ,Quantum key distribution ,01 natural sciences ,010305 fluids & plasmas ,Continuous variable ,symbols.namesake ,0103 physical sciences ,symbols ,Low-density parity-check code ,Quantum information ,010306 general physics ,Algorithm ,Decoding methods ,Coding (social sciences) - Abstract
Quantum key distribution (QKD) is the most mature application of quantum information technology. Information reconciliation is a crucial step in QKD and significantly affects the final secret key rates shared between two legitimate parties. We analyze and compare various construction methods of low-density parity-check (LDPC) codes and design high-performance irregular LDPC codes with a block length of 106. Starting from these good codes and exploiting the slice reconciliation technique based on multilevel coding and multistage decoding, we realize high-efficiency Gaussian key reconciliation with efficiency higher than 95% for signal-to-noise ratios above 1. Our demonstrated method can be readily applied in continuous variable QKD.
- Published
- 2017
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