Cited by 174Quantum Information and CryptographyOrbital Angular Momentum in OpticsQuantum Mechanics and Applications

Self-healing of quantum entanglement after an obstruction

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McLaren, Melanie, Mhlanga, Thandeka, Padgett, Miles J., Roux, Filippus S., Forbes, Andrew·2014·Nature Communications

Abstract

Quantum entanglement between photon pairs is fragile and can easily be masked by losses in transmission path and noise in the detection system. When observing the quantum entanglement between the spatial states of photon pairs produced by parametric down-conversion, the presence of an obstruction introduces losses that can mask the correlations associated with the entanglement. Here we show that we can overcome these losses by measuring in the Bessel basis, thus once again revealing the entanglement after propagation beyond the obstruction. We confirm that, for the entanglement of orbital angular momentum, measurement in the Bessel basis is more robust to these losses than measuring in the usually employed Laguerre-Gaussian basis. Our results show that appropriate choice of measurement basis can overcome some limitations of the transmission path, perhaps offering advantages in free-space quantum communication or quantum processing systems.

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  • South African researchers have made pioneering contributions in structured light for quantum information processing, including the first high-dimensional entanglement with spatial modes for communications and self-healing quantum states.

    “there have been pioneering work with structured light for quantum information processing [21][22][23] that include the first highdimensional entanglement with spatial modes for communications 24 and self-healing quantum states.25”

    From Toward a quantum future for South Africa (2021) · cites this paper as [25]

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Authors
McLaren, M., Mhlanga, T., Padgett, M. J., Roux, F. S., & Forbes, A.
Affiliations
  • Council for Scientific and Industrial Research (ZA)
  • Scottish Universities Physics Alliance (GB)
Corresponding author
Forbes, Andrew
Venue
Nature Communications
Published
2014-02-06
Volume
5
Issue
1
Pages
3248-3248
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2067867810
Cited by
174
References
39
Citations by year
2026: 9 · 2025: 18 · 2024: 17 · 2023: 16 · 2022: 14 · 2021: 13 · 2020: 15 · 2019: 12 · 2018: 9 · 2017: 14 · 2016: 10 · 2015: 15 · 2014: 12
FWCI
16.93
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
  • SUNScholar (Stellenbosch University) (submittedVersion)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Orbital Angular Momentum in Optics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
quantum entanglement, orbital angular momentum, Bessel beams, Laguerre-Gaussian beams, parametric down-conversion, photon pairs, optical loss, obstructions, measurement bases, free-space quantum communication, spatial entanglement

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