Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes

Abstract Satellite‐based, long‐distance free‐space quantum key distribution has the potential to realise global quantum secure communication networks. Detecting faint quantum optical pulses sent from space requires highly accurate and robust classical timing systems to pick out signals from the nois...

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Autores principales:	Peide Zhang, Daniel K. L. Oi, David Lowndes, John G. Rarity
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	cryptography protocols photons quantum communication quantum cryptography quantum information Telecommunication TK5101-6720
Acceso en línea:	https://doaj.org/article/f51ed9859e084205a2e7d685d70dc140
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spelling	oai:doaj.org-article:f51ed9859e084205a2e7d685d70dc1402021-11-22T16:30:52ZTiming and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes2632-892510.1049/qtc2.12019https://doaj.org/article/f51ed9859e084205a2e7d685d70dc1402021-09-01T00:00:00Zhttps://doi.org/10.1049/qtc2.12019https://doaj.org/toc/2632-8925Abstract Satellite‐based, long‐distance free‐space quantum key distribution has the potential to realise global quantum secure communication networks. Detecting faint quantum optical pulses sent from space requires highly accurate and robust classical timing systems to pick out signals from the noise and allow for reconciliation of sent and received key bits. For such high‐loss applications, a fault‐tolerant synchronisation signal coding and decoding scheme based on de Bruijn sequences is proposed. A representative synchronisation timing system was tested in laboratory conditions and it demonstrated high fault tolerance for the error‐correction algorithm even under high loss. The performance limitations of this solution are also discussed, and the maximum error tolerance of the scheme and the estimated computational overhead are analysed, allowing for the possibility of implementation on a real‐time system‐on‐chip. This solution not only can be used for synchronisation of high‐loss channels such as channels between satellites and ground stations but can also be extended to applications with low loss, high bit error rate, but require reliable synchronisation such as quantum and non‐quantum communications over terrestrial free space or fibre optic channels.Peide ZhangDaniel K. L. OiDavid LowndesJohn G. RarityWileyarticlecryptography protocolsphotonsquantum communicationquantum cryptographyquantum informationTelecommunicationTK5101-6720ENIET Quantum Communication, Vol 2, Iss 3, Pp 80-89 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cryptography protocols photons quantum communication quantum cryptography quantum information Telecommunication TK5101-6720
spellingShingle	cryptography protocols photons quantum communication quantum cryptography quantum information Telecommunication TK5101-6720 Peide Zhang Daniel K. L. Oi David Lowndes John G. Rarity Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
description	Abstract Satellite‐based, long‐distance free‐space quantum key distribution has the potential to realise global quantum secure communication networks. Detecting faint quantum optical pulses sent from space requires highly accurate and robust classical timing systems to pick out signals from the noise and allow for reconciliation of sent and received key bits. For such high‐loss applications, a fault‐tolerant synchronisation signal coding and decoding scheme based on de Bruijn sequences is proposed. A representative synchronisation timing system was tested in laboratory conditions and it demonstrated high fault tolerance for the error‐correction algorithm even under high loss. The performance limitations of this solution are also discussed, and the maximum error tolerance of the scheme and the estimated computational overhead are analysed, allowing for the possibility of implementation on a real‐time system‐on‐chip. This solution not only can be used for synchronisation of high‐loss channels such as channels between satellites and ground stations but can also be extended to applications with low loss, high bit error rate, but require reliable synchronisation such as quantum and non‐quantum communications over terrestrial free space or fibre optic channels.
format	article
author	Peide Zhang Daniel K. L. Oi David Lowndes John G. Rarity
author_facet	Peide Zhang Daniel K. L. Oi David Lowndes John G. Rarity
author_sort	Peide Zhang
title	Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
title_short	Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
title_full	Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
title_fullStr	Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
title_full_unstemmed	Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes
title_sort	timing and synchronisation for high‐loss free‐space quantum communication with hybrid de bruijn codes
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/f51ed9859e084205a2e7d685d70dc140
work_keys_str_mv	AT peidezhang timingandsynchronisationforhighlossfreespacequantumcommunicationwithhybriddebruijncodes AT danielkloi timingandsynchronisationforhighlossfreespacequantumcommunicationwithhybriddebruijncodes AT davidlowndes timingandsynchronisationforhighlossfreespacequantumcommunicationwithhybriddebruijncodes AT johngrarity timingandsynchronisationforhighlossfreespacequantumcommunicationwithhybriddebruijncodes
_version_	1718417531967897600

Timing and synchronisation for high‐loss free‐space quantum communication with Hybrid de Bruijn Codes

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