A simple low-latency real-time certifiable quantum random number generator

Yanbao Zhang (), Hsin-Pin Lo (), Alan Mink, Takuya Ikuta, Toshimori Honjo, Hiroki Takesue and William J. Munro
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Yanbao Zhang: NTT Corporation
Hsin-Pin Lo: NTT Corporation
Alan Mink: National Institute of Standards and Technology
Takuya Ikuta: NTT Corporation
Toshimori Honjo: NTT Corporation
Hiroki Takesue: NTT Corporation
William J. Munro: NTT Corporation

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Quantum random numbers distinguish themselves from others by their intrinsic unpredictability arising from the principles of quantum mechanics. As such they are extremely useful in many scientific and real-world applications with considerable efforts going into their realizations. Most demonstrations focus on high asymptotic generation rates. For this goal, a large number of repeated trials are required to accumulate a significant store of certifiable randomness, resulting in a high latency between the initial request and the delivery of the requested random bits. Here we demonstrate low-latency real-time certifiable randomness generation from measurements on photonic time-bin states. For this, we develop methods to certify randomness taking into account adversarial imperfections in both the state preparation and the measurement apparatus. Every 0.12 s we generate a block of 8192 random bits which are certifiable against all quantum adversaries with an error bounded by 2−64. Our quantum random number generator is thus well suited for realizing a continuously-operating, high-security and high-speed quantum randomness beacon.

Date: 2021
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DOI: 10.1038/s41467-021-21069-8

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