Chinese Journal of Quantum Electronics, Volume. 40, Issue 6, 933(2023)
High speed quantum random number generation based on vacuum fluctuations
Figures & Tables(9)
Fig. 2. Statistical distribution of shot noise and classical noise
Fig. 3. Time series distribution of shot noise and classical noise
Fig. 4. Spectrum measurement results of shot noise under 2 × 2 BS. (a) The reflected light is weak; (b) The reflected light is strong
Fig. 5. Spectrum characteristic measurement under 1 × 2 BS. (a) Shot noise; (b) Classic noise
Table 1. Comparison of common schemes for generating quantum random numbers based on light sources
View tableView in ArticleTable 1. Comparison of common schemes for generating quantum random numbers based on light sources
随机源类型 物理原理 主要优势 速率(量级) 主要挑战 空间分辨性 光子路径叠加测量 1) 方案原理简单, 便于建模;
2) 具有明显的量子非确定性;
3) 理论上, 该方案能产生完美的理想二进制序列
Mbps 1) 两路探测器不平衡;
2) 探测器死时间
光子数分辨性 一定时间内光子数统计 1) 无需双路探测器, 平衡性提高;
2) 输出序列偏置大幅降低
Mbps 1) 光子分辨能力;
2) 探测器死时间
时间分辨性 光子到达时间差统计 1) 装置只存在一个探测器, 避免多路探测不平衡;
2) 可在一次测量中将时间差量化成多个bit
Mbps 1) 时间精度;
2) 探测器死时间
真空涨落 散粒噪声测量 1) 真空态易制备;
2) 对探测效率不敏感;
3) 探测所得可一次量化为多个比特
Mbps～Gbps 1) 经典噪声占比大;
2) 零差探测器带宽
相位噪声 激光相位噪声波动 1) 机理明确;
2) 相位噪声方差、最优功率等指标都有系统的分析方法, 便于选值
Mbps～Gbps 1) 相位漂移;
2) 设备体积大
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Zhenyang JIN, Xiangkui WAN, Tao LIAO, Liuping CHEN. High speed quantum random number generation based on vacuum fluctuations[J]. Chinese Journal of Quantum Electronics, 2023, 40(6): 933
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Received: Jul. 22, 2022
Accepted: --
Published Online: Dec. 22, 2023
The Author Email: JIN Zhenyang (1105989018@qq.com)
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