| 引用本文: | 王潋,周媛媛,周学军,陈霄,张政.一种新的双模态光源诱骗态量子密钥分配方案[J].哈尔滨工业大学学报,2018,50(11):74.DOI:10.11918/j.issn.0367-6234.201709076 |
| WANG Lian,ZHOU Yuanyuan,ZHOU Xuejun,CHEN Xiao,ZHANG Zheng.New scheme for decoy state quantum key distribution with the two-mode state source[J].Journal of Harbin Institute of Technology,2018,50(11):74.DOI:10.11918/j.issn.0367-6234.201709076 |
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| 摘要: |
| 提出了一种新的基于双模态光源的被动诱骗态量子密钥分配通用方案.作为双模态之一的标记态，在发端经过分束和检测后获得4类探测结果，据此，将作为信号态的另一模式分成4个非空脉冲集合，从而利用这4类脉冲进行参数估计和密钥提取.同时，基于预报单光子源和标记配对相干态光源对此方案展开了性能分析，讨论了发端探测器不同探测效率对系统性能的影响，并对实际系统进行了统计波动分析.仿真结果表明：方案性能在误码率和安全传输距离(可达198.6 km)方面都优于现有基于不同光源的3强度诱骗态量子密钥分配方案；采用标记配对相干态光源的各方面性能均优于采用预报单光子源；密钥生成率随发端探测效率的增大而增大；考虑统计波动时，标记配对相干态光源的有效性也要优于预报单光子源，且其数据长度为109时，此方案最大安全距离达到164 km；此方案仅需使用单一强度脉冲，在降低调制光源实现难度的同时又提升了系统性能，对QKD系统的工程实现具有一定的参考价值.
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| 关键词: 量子密钥分配 无条件安全性 被动诱骗态 双模态光源 统计波动 |
| DOI：10.11918/j.issn.0367-6234.201709076 |
| 分类号:TN918 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(61302099) |
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| New scheme for decoy state quantum key distribution with the two-mode state source |
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WANG Lian,ZHOU Yuanyuan,ZHOU Xuejun,CHEN Xiao,ZHANG Zheng
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(School of Electronic Engineering, Naval University of Engineering, Wuhan 430000, China)
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| Abstract: |
| A new and universal scheme for passive decoy-state quantum key distribution (QKD) with the two-mode state source is proposed. As one of the two-mode, the trigger state can obtain four types of detection events after splitting and detecting at the transmitter. Based on those events, the other mode as the signal state is divided into four sets of pulses which can be used to estimate parameters and extract key. Besides, the performance analysis is carried out on the scheme with the heralded single-photon source (HSPS) and the heralded pair coherent state (HPCS). The impact of different detection efficiency is discussed. Moreover, the statistical fluctuation in the practical system is numerically studied. Our simulation results show that the performance of our scheme is superior to the existing three-intensity decoy-state QKD schemes with different sources in terms of bit error rate and secure transmission distance (up to 198.6 km). The performance of using HPCS is better than that of using HSPS, and the key generation rate increases with the rising of detection efficiency at the transmitter. Considering the statistical fluctuation, the efficiency of HPCS is also better than HSPS, and the maximum secure distance of our scheme can reach 164 km when the data length is 109. Furthermore, our scheme only needs to use a single intensity pulse, which reduces the difficulty of the system implementation while improving the system performance. It has certain reference value to the implementation of QKD system.
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| Key words: quantum key distribution unconditional security passive decoy-state two-mode state source statistical fluctuation |
