| 连续变量量子密钥分发的数据逆向协调 |
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| 引用本文： | 白增亮,王旭阳,杜鹏燕,李永民.连续变量量子密钥分发的数据逆向协调[J].量子光学学报,2012,18(1):23-26. |
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| 作者姓名： | 白增亮 王旭阳 杜鹏燕 李永民 |
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| 作者单位： | 量子光学与光量子器件国家重点实验室,山西大学光电研究所,山西太原030006 |
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| 基金项目： | 国家自然科学基金，山西省高等学校优秀青年学术带头人支持计划，山西省回国留学人员科研资助项目 |
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| 摘 要： | 基于多级编码/多级译码(MLC/MSD)系统实现了连续变量量子密钥分发的逆向数据协调。讨论了高斯连续变量量化过程中使互信息量最大时最佳量化区间的选取,并且通过理论计算给出了信噪比为4dB的情况下各级等价信道的最佳码率。协调方案中选择低密度奇偶校验码(LDPC)作为信道编码,结合边信息译码原理最终通过LDPC迭代译码算法实现了数据的逆向协调。
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| 关 键 词： | 连续变量 量子密钥分发 逆向协调 低密度奇偶校验码 |
| 收稿时间： | 2011/11/30 |
Reverse Reconciliation for Continuous Variable Quantum Key Distribution |
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| BAI Zeng-liang
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WANG Xu-yang
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DU Peng-yan
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LI Yong-min.Reverse Reconciliation for Continuous Variable Quantum Key Distribution[J].Acta Sinica Quantum Optica,2012,18(1):23-26. |
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| Authors: | BAI Zeng-liang WANG Xu-yang DU Peng-yan LI Yong-min |
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| Institution: | (State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China) |
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| Abstract: | Based on the Multilevel Codes／Multistage Decoding system, we achieved the reverse reconciliation for continuous variable quantum key distribution. Firstly, we show how to select the optimal quantization interval by maximizing the mutual information between the communicating parties. Then the optimal rate of each equivalent channel is calculated at the SNR level of 4 dB. The low-density parity check (LDPC) code is chosen as the channel codes, and the reverse reconciliation utilize a side-information based LDPC iterative decoding algorithm. |
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| Keywords: | continuous variable quantum key distribution reverse reconciliation low density parity check code |
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