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Certified random-number generation from quantum steering

Dominick J. Joch1, Sergei Slussarenko1,*, Yuanlong Wang1,†, Alex Pepper1, Shouyi Xie2,‡, Bin-Bin Xu2,§, Ian R. Berkman2, Sven Rogge2, and Geoff J. Pryde1,¶

  • 1Centre for Quantum Dynamics and Centre for Quantum Computation and Communication Technology, Griffith University, Brisbane, Queensland 4111, Australia
  • 2Centre for Quantum Computation and Communication Technology, School of Physics, The University of New South Wales, Sydney, NSW 2052, Australia

  • *s.slussarenko@griffith.edu.au
  • †Present address: Key Laboratory of Systems and Control, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China.
  • ‡Present address: School of Physics, The University of Sydney, Camperdown, NSW 2006, Australia.
  • §Present address: Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
  • g.pryde@griffith.edu.au
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Phys. Rev. A 106, L050401 – Published 7 November, 2022

DOI: https://doi.org/10.1103/PhysRevA.106.L050401

Abstract

The use of simple quantum processes promises to provide numbers that no physical observer could predict, but in practice, unwanted noise and imperfect devices can compromise fundamental randomness and protocol security. The ultimate random number generators take advantage of quantum nonlocality to certify unpredictability—including to an adversary—even in the absence of trust in devices. We demonstrate a generator of public or private randomness based on the quantum steering task. We use polarization-entangled photon pairs to certify and extract randomness in a one-sided device-independent framework, with the detection loophole closed. Our work enables nonlocality-based certified randomness generation in environmental regimes where fully-device-independent protocols are not feasible.

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Phys. Rev. A 106, L050401– Published 7 November, 2022
  • Received 8 February 2022
  • Accepted 17 October 2022
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