Massively parallel ultrafast random bit generation with a chip-scale laser
Massively parallel ultrafast random bit generation with a chip-scale laser
复制标题
DOI：
10.1126/science.abc2666
复制
发表时间：
2021-02-26
期刊：
影响因子：
56.9
通讯作者：
Cao, Hui
中科院分区：
文献类型：
--
作者：
Kim, Kyungduk;Bittner, Stefan;Cao, Hui
随机数广泛用于信息安全、密码学、随机建模和量子模拟。物理随机数生成的关键技术挑战是速度和可扩展性。我们展示了一种方法，用于超快生成数百个随机比特流并行与一个单一的激光二极管。介绍了一种在特殊设计的腔中多个激光模式的时空干涉，作为大大加速随机比特产生的方案。由量子涨落引起的自发发射会产生随机噪声，使比特流变得不可预测。我们实现了总比特率为每秒250太比特与离线后处理，这是两个以上的数量级高于目前的后处理记录。我们的方法是强大的，紧凑的，节能的，在安全通信和高性能计算的潜在应用。
Random numbers are widely used for information security, cryptography, stochastic modeling, and quantum simulations. Key technical challenges for physical random number generation are speed and scalability. We demonstrate a method for ultrafast generation of hundreds of random bit streams in parallel with a single laser diode. Spatiotemporal interference of many lasing modes in a specially designed cavity is introduced as a scheme for greatly accelerated random bit generation. Spontaneous emission, caused by quantum fluctuations, produces stochastic noise that makes the bit streams unpredictable. We achieve a total bit rate of 250 terabits per second with off-line postprocessing, which is more than two orders of magnitude higher than the current postprocessing record. Our approach is robust, compact, and energy-efficient, with potential applications in secure communication and high-performance computation.