基于光量子的真随机源

摘要

A quantum optical true random number generator based on splitting a beam of photons at a 50/50 beamsplitter has been demonstrated.A continuous stream of random numbers at a rate of 200 kbit/s can be generated.A mathematical method (Huffman coding and data compressing) is used to improve the ratio of 0 and 1 bits in the original random number arrays.%介绍基于单光子的量子随机性产生二元真随机序列的实验以及所采用的数学处理方法。实验利用单光子探测器，较高速的信号处理电路和计算机数据采集系统，接收记录随机选择反射或折射路径通过50/50分束器的光子，从而获得原始的二元随机序列。用Huffman编码方法把原始数据压缩为符合密码学要求的真随机序列。随机序列采集的速率理论上可达200 kbit/s.