Self-testing quantum randomness expansion on an integrated photonic chip

• URL: http://arxiv.org/abs/2411.13712v1
• Date: Wed, 20 Nov 2024 21:14:53 GMT
• Title: Self-testing quantum randomness expansion on an integrated photonic chip
• Authors: Gong Zhang, Ignatius William Primaatmaja, Yue Chen, Si Qi Ng, Hong Jie Ng, Marco Pistoia, Xiao Gong, Koon Tong Goh, Chao Wang, Charles Lim,
• Abstract summary: We develop and implement a self-testing quantum random number generator (QRNG) The proposal opens up the possibility to implement miniaturised QRNG devices at production scale.
• Score: 21.4228840758231
• License:
• Abstract: The power of quantum random number generation is more than just the ability to create truly random numbers$\unicode{x2013}$it 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 $5.11\times 10^{-4}$ 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.

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