ORIGINAL RESEARCH article
Front. Quantum Sci. Technol.
Sec. Quantum Computing and Simulation
Volume 4 - 2025 | doi: 10.3389/frqst.2025.1661544
Certified Random Number Generation using Quantum Computers
Provisionally accepted
- 1Indian Institute of Science, Bengaluru, India
- 2Raman Research Institute, Bangalore, India
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We investigate how current noisy quantum computers can be leveraged for generating secure random numbers certified by Quantum Mechanics. While random numbers can be generated and certified in a device-independent manner through the violation of Bell's inequality, this method requires significant spatial separation to satisfy the no-signaling condition, making it impractical for implementation on a single quantum computer. Instead, we employ temporal correlations to generate randomness by violating the Leggett-Garg inequality, which relies on the No-Signaling in Time condition to certify randomness, thus overcoming spatial constraints. By applying this protocol to different IBMQ platforms, we demonstrate the feasibility of secure, semi-device-independent random number generation using low-depth circuits with single-qubit gates. We show how error mitigation techniques lead to LGI violation compatible with theoretical predictions on the existing IBMQ machines.
Keywords: random number generator, Leggett-Garg inequality, Quantum computer, Device Independence (DI), Quantum information
Received: 07 Jul 2025; Accepted: 29 Aug 2025.
Copyright: © 2025 Nath, Sinha and Sinha. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Urbasi Sinha, Raman Research Institute, Bangalore, India
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