Large-alphabet quantum key distribution using spatially encoded light

T.B.H. Tentrup; W.M. Luiten; R. van der Meer; P. Hooijschuur; P.W.H. Pinkse

doi:10.1088/1367-2630/ab5cbe

Large-alphabet quantum key distribution using spatially encoded light

T.B.H. Tentrup, W.M. Luiten, R. van der Meer, P. Hooijschuur, P.W.H. Pinkse^*

^*Corresponding author for this work

Complex Photonic Systems

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single- photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.

Original language	English
Article number	123044
Number of pages	8
Journal	New journal of physics
Volume	21
DOIs	https://doi.org/10.1088/1367-2630/ab5cbe
Publication status	Published - 18 Dec 2019

Keywords

Quantum key distribution
Spatial light encoding
High-dimensional quantum optics
Single-photon detection
Cybersecurity

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10.1088/1367-2630/ab5cbeLicence: CC BY

Tentrup2019largeFinal published version, 865 KBLicence: CC BY
Supplemental MaterialOther version, 192 KB

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title = "Large-alphabet quantum key distribution using spatially encoded light",

abstract = "Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single- photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.",

keywords = "Quantum key distribution, Spatial light encoding, High-dimensional quantum optics, Single-photon detection, Cybersecurity",

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AU - Tentrup, T.B.H.

AU - Luiten, W.M.

AU - van der Meer, R.

AU - Hooijschuur, P.

AU - Pinkse, P.W.H.

N1 - There is associated supplemental material

PY - 2019/12/18

Y1 - 2019/12/18

N2 - Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single- photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.

AB - Most quantum key distribution protocols using a two-dimensional basis, such as HV polarization as first proposed by Bennett and Brassard in 1984, are limited to a key generation density of 1 bit per photon. We increase this key density by encoding information in the transverse spatial displacement of the used photons. Employing this higher-dimensional Hilbert space together with modern single- photon-detecting cameras, we demonstrate a proof-of-principle large-alphabet quantum key distribution experiment with 1024 symbols and a shared information between sender and receiver of 7 bit per photon.

KW - Quantum key distribution

KW - Spatial light encoding

KW - High-dimensional quantum optics

KW - Single-photon detection

KW - Cybersecurity

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JO - New journal of physics

JF - New journal of physics

SN - 1367-2630

M1 - 123044

ER -

Large-alphabet quantum key distribution using spatially encoded light

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