Extending loophole-free nonlocal correlations to arbitrarily large distances - Publikacja - MOST Wiedzy

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Extending loophole-free nonlocal correlations to arbitrarily large distances

Abstrakt

Quantum theory allows spatially separated observers to share nonlocal correlations, which enable them to accomplish classically inconceivable information processing and cryptographic feats. However, the distances over which nonlocal correlations can be realized remain severely limited due to their high fragility to noise and high threshold detection efficiencies. To enable loophole- free nonlocality across large distances, we introduce Bell experiments wherein the spatially separated parties randomly choose the location of their measurement devices. We demonstrate that when devices close to the source are perfect and witness extremal nonlocal correlations, such correlations can be extended to devices placed arbitrarily far from the source. To accommodate imperfections close to the source, we demonstrate an analytic trade-off: the higher the loophole-free nonlocality close to the source, the lower the threshold requirements away from the source. We utilize this trade-off and formulate numerical methods to estimate the critical requirements of individual measurement devices in such experiments.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
npj Quantum Information nr 10, strony 1 - 9,
ISSN: 2056-6387
Język:
angielski
Rok wydania:
2024
Opis bibliograficzny:
Chaturvedi A., Viola G., Pawłowski M.: Extending loophole-free nonlocal correlations to arbitrarily large distances// npj Quantum Information -Vol. 7, (2024), s.1-9
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1038/s41534-023-00799-1
Źródła finansowania:
  • Open Access
Weryfikacja:
Politechnika Gdańska

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