Practical randomness amplification and privatisation with implementations on quantum computers
RWTH Publications (RWTH Aachen)
Abstract
We present an end-to-end and practical randomness amplification and privatisation protocol based on Bell tests. This allows the building of device-independent random number generators which output (near-)perfectly unbiased and private numbers, even if using an uncharacterised quantum device potentially built by an adversary. Our generation rates are linear in the repetition rate of the quantum device and the classical randomness post-processing has quasi-linear complexity - making it efficient on a standard personal laptop. The statistical analysis is also tailored for real-world quantum devices. Our protocol is then showcased on several different quantum computers. Although not purposely built for the task, we show that quantum computers can run faithful Bell tests by adding minimal assumptions. In this semi-device-independent manner, our protocol generates (near-)perfectly unbiased and private random numbers on today's quantum computers.
Authors 5
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Affiliation as printed
Department of Computer Science , University College London , London , United Kingdom
Quantinuum , Partnership House , Carlisle Place , London SW1P 1BX , United Kingdom
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Affiliation as printed
Quantinuum , Partnership House , Carlisle Place , London SW1P 1BX , United Kingdom
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Affiliation as printed
Quantinuum , Terrington House , 13-15 Hills Road , Cambridge CB2 1NL , United Kingdom
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RWTH Aachen University · Imperial College London
Affiliation as printed
Department of Computing , Imperial College London , United Kingdom
Institute for Quantum Information , RWTH Aachen University , Aachen , Germany
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Affiliation as printed
Quantinuum , Terrington House , 13-15 Hills Road , Cambridge CB2 1NL , United Kingdom
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