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Near-maximal two-photon entanglement for quantum communications at 2.1 μm

Near-maximal two-photon entanglement for quantum communications at 2.1 μm
Near-maximal two-photon entanglement for quantum communications at 2.1 μm
Owing to a reduced solar background and low propagation losses in the atmosphere, the 2- to 2.5-μm waveband is a promising candidate for daylight quantum communication. This spectral region also offers low losses and low dispersion in hollow-core fibers and in silicon waveguides. We demonstrate
near-maximally entangled photon pairs at 2.1 μm that could support device-independent quantum key distribution (DIQKD), assuming sufficiently high channel efficiencies. The state corresponds to a positive secure-key rate (0.254 bits/pair, with a quantum bit error rate of 3.8%) based on measurements in a
laboratory setting with minimal channel loss and transmission distance. This is promising for the future implementation of DIQKD at 2.1 μm.
2331-8422
Dada, Adetunmise
59df6fc9-3ea0-4381-9be9-7834f0e77922
Kaniewski, Jedrzej
1b6dfac1-1334-4867-8ef9-730eab9ca5af
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Lavery, Martin P.J.
375799be-9e2a-4db6-9f07-2bd69554988b
Hadfield, Robert
8c33cbe7-4c71-4198-9a96-029bbea93b22
Faccio, Daniele
4bc95171-0d90-4392-8333-528cbcb80e84
Clerici, Matteo
9567b2f6-2f8f-4f04-8a74-eba390c4a430
Dada, Adetunmise
59df6fc9-3ea0-4381-9be9-7834f0e77922
Kaniewski, Jedrzej
1b6dfac1-1334-4867-8ef9-730eab9ca5af
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Lavery, Martin P.J.
375799be-9e2a-4db6-9f07-2bd69554988b
Hadfield, Robert
8c33cbe7-4c71-4198-9a96-029bbea93b22
Faccio, Daniele
4bc95171-0d90-4392-8333-528cbcb80e84
Clerici, Matteo
9567b2f6-2f8f-4f04-8a74-eba390c4a430

Dada, Adetunmise, Kaniewski, Jedrzej, Gawith, Corin, Lavery, Martin P.J., Hadfield, Robert, Faccio, Daniele and Clerici, Matteo (2021) Near-maximal two-photon entanglement for quantum communications at 2.1 μm. arXiv.

Record type: Article

Abstract

Owing to a reduced solar background and low propagation losses in the atmosphere, the 2- to 2.5-μm waveband is a promising candidate for daylight quantum communication. This spectral region also offers low losses and low dispersion in hollow-core fibers and in silicon waveguides. We demonstrate
near-maximally entangled photon pairs at 2.1 μm that could support device-independent quantum key distribution (DIQKD), assuming sufficiently high channel efficiencies. The state corresponds to a positive secure-key rate (0.254 bits/pair, with a quantum bit error rate of 3.8%) based on measurements in a
laboratory setting with minimal channel loss and transmission distance. This is promising for the future implementation of DIQKD at 2.1 μm.

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Published date: 22 June 2021

Identifiers

Local EPrints ID: 452926
URI: http://eprints.soton.ac.uk/id/eprint/452926
ISSN: 2331-8422
PURE UUID: ce2b8b72-6e60-4f08-a4f1-98a3fcd79792
ORCID for Corin Gawith: ORCID iD orcid.org/0000-0002-3502-3558

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Date deposited: 06 Jan 2022 17:50
Last modified: 28 Apr 2022 01:46

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Contributors

Author: Adetunmise Dada
Author: Jedrzej Kaniewski
Author: Corin Gawith ORCID iD
Author: Martin P.J. Lavery
Author: Robert Hadfield
Author: Daniele Faccio
Author: Matteo Clerici

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