Wayne Michael A, Migdall Alan L, Levine Zachary H, Bienfang Joshua C
Opt Express. 2018 Dec 10;26(25):32788-32801. doi: 10.1364/OE.26.032788.
The low-latency requirements of a practical loophole-free Bell test preclude time-consuming post-processing steps that are often used to improve the statistical quality of a physical random number generator (RNG). Here we demonstrate a post-processing-free RNG that produces a random bit within 2.4(2) ns of an input trigger. We use weak feedback to eliminate long-term drift, resulting in 24 hour operation with output that is statistically indistinguishable from a Bernoulli process. We quantify the impact of the feedback on the predictability of the output as less than 6.4×10 and demonstrate the utility of the Allan variance as a tool for characterizing non-idealities in RNGs.
实际无漏洞贝尔测试的低延迟要求排除了常用于提高物理随机数发生器（RNG）统计质量的耗时后处理步骤。在此，我们展示了一种无需后处理的随机数发生器，它能在输入触发的2.4(2)纳秒内产生一个随机比特。我们使用弱反馈来消除长期漂移，实现了24小时运行，其输出在统计上与伯努利过程无法区分。我们将反馈对输出可预测性的影响量化为小于6.4×10，并展示了阿伦方差作为表征随机数发生器非理想性工具的效用。
