Metalens array for quantum random number

作者：Yubin Fan, Shufan Chen, Xiaoyuan Liu, Xiaoyu Che, Xiaodong Qiu, Mu Ku Chen, Din Ping Tsai · 发表于：Applied Physics Reviews · 年份：2024 · DOI：10.1063/5.0224766 · 被引用次数：12 · 研究领域：Quantum Information and Cryptography、Quantum Computing Algorithms and Architecture、Quantum optics and atomic interactions

Quantum random number generation (QRNG) leveraging intrinsic quantum uncertainty has attracted significant interest in the field of integrated photonic architecture, with applications in quantum cryptography, tests of quantum nonlocality, and beyond. The demand for compact, low-energy consumption, robust, fast, and cost-effective QRNGs integrated into photonic chips is highlighted, whereas most previous works focused on bulk optics. Here, based on the metalens array entangled source, we experimentally realized a miniaturized, high-dimensional quantum random number generator via a meta-device without post-randomness extraction. Specifically, the device has a high-density output with 100 channels per square millimeter. This chip-scale quantum randomness source can obtain random number arrays without post-randomness extraction and enable compact integration for quantum applications needing secure keys or randomness. Our approach demonstrates potential in secure key generation and randomness for quantum applications.