Realization of a source-device-independent quantum random number generator secured by nonlocal dispersion cancellation

IF 20.6 1区 物理与天体物理 Q1 OPTICS Advanced Photonics Pub Date : 2022-12-31 DOI:10.1117/1.AP.5.3.036003
Ji-Ning Zhang, Ran Yang, Xinhui Li, Chang-Wei Sun, Yichen Liu, Ying Wei, Jiachen Duan, Zhenda Xie, Y. Gong, Shi-Deng Zhu
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引用次数: 1

Abstract

Abstract. Quantum random number generators (QRNGs) can provide genuine randomness by exploiting the intrinsic probabilistic nature of quantum mechanics, which play important roles in many applications. However, the true randomness acquisition could be subjected to attacks from untrusted devices involved or their deviations from the theoretical modeling in real-life implementation. We propose and experimentally demonstrate a source-device-independent QRNG, which enables one to access true random bits with an untrusted source device. The random bits are generated by measuring the arrival time of either photon of the time–energy entangled photon pairs produced from spontaneous parametric downconversion, where the entanglement is testified through the observation of nonlocal dispersion cancellation. In experiment, we extract a generation rate of 4 Mbps by a modified entropic uncertainty relation, which can be improved to gigabits per second by using advanced single-photon detectors. Our approach provides a promising candidate for QRNGs with no characterization or error-prone source devices in practice.
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基于非局域色散抵消的源设备无关量子随机数发生器的实现
摘要量子随机数发生器(qrng)利用量子力学固有的概率特性提供了真正的随机性,在许多应用中发挥着重要作用。然而,真正的随机性获取可能会受到来自所涉及的不可信设备的攻击或它们在实际实现中与理论模型的偏差。我们提出并实验证明了一种独立于源设备的QRNG,它使人们能够使用不可信的源设备访问真正的随机比特。随机比特是通过测量自发参数下转换产生的时间-能量纠缠光子对中的任意一个光子的到达时间而产生的,其中的纠缠通过观察非局部色散抵消来证明。在实验中,我们通过改进的熵不确定性关系提取了4 Mbps的生成速率,通过使用先进的单光子探测器可以将其提高到每秒千兆比特。我们的方法在实践中为没有表征或容易出错的源器件的qrng提供了一个有希望的候选方法。
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来源期刊
CiteScore
22.70
自引率
1.20%
发文量
49
审稿时长
18 weeks
期刊介绍: Advanced Photonics is a highly selective, open-access, international journal that publishes innovative research in all areas of optics and photonics, including fundamental and applied research. The journal publishes top-quality original papers, letters, and review articles, reflecting significant advances and breakthroughs in theoretical and experimental research and novel applications with considerable potential. The journal seeks high-quality, high-impact articles across the entire spectrum of optics, photonics, and related fields with specific emphasis on the following acceptance criteria: -New concepts in terms of fundamental research with great impact and significance -State-of-the-art technologies in terms of novel methods for important applications -Reviews of recent major advances and discoveries and state-of-the-art benchmarking. The journal also publishes news and commentaries highlighting scientific and technological discoveries, breakthroughs, and achievements in optics, photonics, and related fields.
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