The power of quantum random number generation is more than just the ability to create truly random numbers\unicodex2013it can also enable self-testing, which allows the user to verify the implementation integrity of certain critical quantum components with minimal assumptions. In this work, we develop and implement a self-testing quantum random number generator (QRNG) chipset capable of generating 15.33 Mbits of certifiable randomness in each run (an expansion rate of 5.11×10−4 at a repetition rate of 10 Mhz). The chip design is based on a highly loss-and-noise tolerant measurement-device-independent protocol, where random coherent states encoded using quadrature phase shift keying are used to self-test the quantum homodyne detection unit: well-known to be challenging to characterise in practice. Importantly, this proposal opens up the possibility to implement miniaturised self-testing QRNG devices at production scale using standard silicon photonics foundry platforms.
@article{arxiv.2411.13712,
title = {Self-testing quantum randomness expansion on an integrated photonic chip},
author = {Gong Zhang and Ignatius William Primaatmaja and Yue Chen and Si Qi Ng and Hong Jie Ng and Marco Pistoia and Xiao Gong and Koon Tong Goh and Chao Wang and Charles Lim},
journal= {arXiv preprint arXiv:2411.13712},
year = {2024}
}