Cited by 324Quantum Information and CryptographyQuantum Mechanics and ApplicationsRandom lasers and scattering media

Randomness versus Nonlocality and Entanglement

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Acín, Antonio, Massar, Serge, Pironio, Stefano·2012·Physical Review Letters

Abstract

The outcomes obtained in Bell tests involving two-outcome measurements on two subsystems can, in principle, generate up to 2 bits of randomness. However, the maximal violation of the Clauser-Horne-Shimony-Holt inequality guarantees the generation of only 1.23 bits of randomness. We prove here that quantum correlations with arbitrarily little nonlocality and states with arbitrarily little entanglement can be used to certify that close to the maximum of 2 bits of randomness are produced. Our results show that nonlocality, entanglement, and randomness are inequivalent quantities. They also imply that device-independent quantum key distribution with an optimal key generation rate is possible by using almost-local correlations and that device-independent randomness generation with an optimal rate is possible with almost-local correlations and with almost-unentangled states.

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Crossref · 10.1103/physrevlett.108.100402

Cites

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  • Although non-locality or entanglement certifies the randomness, the three quantities, non-locality, entanglement and randomness, are not equivalent.

    “Although non-locality or entanglement certi fi es the randomness, the three quantities, non-locality, entanglement and randomness, are not equivalent. 68”

    From Quantum random number generation (2016) · cites this paper as [68]

    The Discussion (p. 9) says that non-locality is necessary for certifying randomness and that certified randomness is inequivalent to both non-locality and entanglement. The Abstract (p. 1) links randomness from measuring an entangled state to the additional condition that the outcomes violate a Bell inequality; it does not establish that entanglement alone certifies randomness. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Maximum randomness generation does not require maximum non-local correlation or a maximum entangled state.

    “Maximum randomness generation does not require maximum non-local correlation or a maximum entangled state.”

    From Quantum random number generation (2016) · cites this paper as [68]

    The Abstract (p. 1) says that correlations with arbitrarily small CHSH violations and states with arbitrarily little entanglement can certify randomness close to the two-bit maximum. The Discussion (p. 11) likewise says the authors establish arbitrarily close to two bits, not that the exact maximum is attained without maximal entanglement. The claim omits that qualification. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • It is shown that 2 bits of randomness can be certified with little involvement of non-locality and entanglement.

    “It is shown that 2 bits of randomness can be certi fi ed with little involvement of non-locality and entanglement. 68”

    From Quantum random number generation (2016) · cites this paper as [68]

    The Abstract (pp. 1–2) says correlations with arbitrarily little CHSH violation or states with arbitrarily little entanglement can certify randomness arbitrarily close to two bits. The claim captures the main finding but states two bits exactly and may imply that both resources are small in the same case; the cited passages establish neither qualification. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Cites

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Research works printed but not linked: 2

  1. [8][8] D. Mayers and A. Yao, in FOCS 98: Proceedings of the 39th Annual Symposium on Foundations of Computer Science 503-509 (IEEE Computer Society, Washington DC, 1998). -
  2. [21][21] T. Franz, F. Furrer, and R. F. Werner, arXiv:1010.1131 - · arXiv

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Authors
Acín, A., Massar, S., & Pironio, S.
Affiliations
  • Institució Catalana de Recerca i Estudis Avançats (ES)
  • Université Libre de Bruxelles (BE)
Venue
Physical Review Letters
Published
2012-03-09
Volume
108
Issue
10
Pages
100402-100402
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W1985083346
Cited by
324
References
23
Citations by year
2026: 18 · 2025: 29 · 2024: 20 · 2023: 30 · 2022: 21 · 2021: 28 · 2020: 27 · 2019: 55 · 2018: 21 · 2017: 11 · 2016: 14 · 2015: 16 · 2014: 13 · 2013: 19 · 2012: 2
FWCI
15.63
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Physics and Astronomy › Acoustics and Ultrasonics › Random lasers and scattering media
Keywords
randomness generation, nonlocality, entanglement, Bell tests, CHSH inequality, device-independent quantum key distribution, device-independent randomness generation, quantum correlations

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