Bustard Philip J, Moffatt Doug, Lausten Rune, Wu Guorong, Walmsley Ian A, Sussman Benjamin J
Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, UK.
Opt Express. 2011 Dec 5;19(25):25173-80. doi: 10.1364/OE.19.025173.
Random number sequences are a critical resource in a wide variety of information systems, including applications in cryptography, simulation, and data sampling. We introduce a quantum random number generator based on the phase measurement of Stokes light generated by amplification of zero-point vacuum fluctuations using stimulated Raman scattering. This is an example of quantum noise amplification using the most noise-free process possible: near unitary quantum evolution. The use of phase offers robustness to classical pump noise and the ability to generate multiple bits per measurement. The Stokes light is generated with high intensity and as a result, fast detectors with high signal-to-noise ratios can be used for measurement, eliminating the need for single-photon sensitive devices. The demonstrated implementation uses optical phonons in bulk diamond.
随机数序列是包括密码学、模拟和数据采样等多种信息系统中的关键资源。我们介绍了一种基于受激拉曼散射放大零点真空涨落产生的斯托克斯光相位测量的量子随机数发生器。这是使用尽可能无噪声的过程（即近幺正量子演化）进行量子噪声放大的一个例子。相位的使用对经典泵浦噪声具有鲁棒性，并且每次测量能够生成多个比特。斯托克斯光以高强度产生，因此，可以使用具有高信噪比的快速探测器进行测量，无需单光子敏感器件。所展示的实现方式使用了块状金刚石中的光学声子。
