Gehring, Tobias, Lupo, Cosmo orcid.org/0000-0002-5227-4009, Kordts, Arne et al. (6 more authors) (2021) Homodyne-based quantum random number generator at 2.9 Gbps secure against quantum side-information. Nature Communications. 605. ISSN 2041-1723
Abstract
Quantum random number generators promise perfectly unpredictable random numbers. A popular approach to quantum random number generation is homodyne measurements of the vacuum state, the ground state of the electro-magnetic field. Here we experimentally implement such a quantum random number generator, and derive a security proof that considers quantum side-information instead of classical side-information only. Based on the assumptions of Gaussianity and stationarity of noise processes, our security analysis furthermore includes correlations between consecutive measurement outcomes due to finite detection bandwidth, as well as analog-to-digital converter imperfections. We characterize our experimental realization by bounding measured parameters of the stochastic model determining the min-entropy of the system’s measurement outcomes, and we demonstrate a real-time generation rate of 2.9 Gbit/s. Our generator follows a trusted, device-dependent, approach. By treating side-information quantum mechanically an important restriction on adversaries is removed, which previously was reserved to semi-device-independent and device-independent schemes.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2021 |
Keywords: | quant-ph |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 04 Jan 2021 18:00 |
Last Modified: | 16 Oct 2024 17:12 |
Published Version: | https://doi.org/10.1038/s41467-020-20813-w |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41467-020-20813-w |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169326 |