Proposal for space-borne quantum memories for global quantum networking

Abstract Global-scale quantum communication links will form the backbone of the quantum internet. However, exponential loss in optical fibres precludes any realistic application beyond few hundred kilometres. Quantum repeaters and space-based systems offer solutions to overcome this limitation. Here...

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Autores principales:	Mustafa Gündoğan, Jasminder S. Sidhu, Victoria Henderson, Luca Mazzarella, Janik Wolters, Daniel K. L. Oi, Markus Krutzik
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/b6b4d75dbf9e42d6a9c2f2956fa78cc5
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spelling	oai:doaj.org-article:b6b4d75dbf9e42d6a9c2f2956fa78cc52021-12-02T17:08:43ZProposal for space-borne quantum memories for global quantum networking10.1038/s41534-021-00460-92056-6387https://doaj.org/article/b6b4d75dbf9e42d6a9c2f2956fa78cc52021-08-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00460-9https://doaj.org/toc/2056-6387Abstract Global-scale quantum communication links will form the backbone of the quantum internet. However, exponential loss in optical fibres precludes any realistic application beyond few hundred kilometres. Quantum repeaters and space-based systems offer solutions to overcome this limitation. Here, we analyse the use of quantum memory (QM)-equipped satellites for quantum communication focussing on global range repeaters and memory-assisted (MA-) QKD, where QMs help increase the key rate by synchronising otherwise probabilistic detection events. We demonstrate that satellites equipped with QMs provide three orders of magnitude faster entanglement distribution rates than existing protocols based on fibre-based repeaters or space systems without QMs. We analyse how entanglement distribution performance depends on memory characteristics, determine benchmarks to assess the performance of different tasks and propose various architectures for light-matter interfaces. Our work provides a roadmap to realise unconditionally secure quantum communications over global distances with near-term technologies.Mustafa GündoğanJasminder S. SidhuVictoria HendersonLuca MazzarellaJanik WoltersDaniel K. L. OiMarkus KrutzikNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Mustafa Gündoğan Jasminder S. Sidhu Victoria Henderson Luca Mazzarella Janik Wolters Daniel K. L. Oi Markus Krutzik Proposal for space-borne quantum memories for global quantum networking
description	Abstract Global-scale quantum communication links will form the backbone of the quantum internet. However, exponential loss in optical fibres precludes any realistic application beyond few hundred kilometres. Quantum repeaters and space-based systems offer solutions to overcome this limitation. Here, we analyse the use of quantum memory (QM)-equipped satellites for quantum communication focussing on global range repeaters and memory-assisted (MA-) QKD, where QMs help increase the key rate by synchronising otherwise probabilistic detection events. We demonstrate that satellites equipped with QMs provide three orders of magnitude faster entanglement distribution rates than existing protocols based on fibre-based repeaters or space systems without QMs. We analyse how entanglement distribution performance depends on memory characteristics, determine benchmarks to assess the performance of different tasks and propose various architectures for light-matter interfaces. Our work provides a roadmap to realise unconditionally secure quantum communications over global distances with near-term technologies.
format	article
author	Mustafa Gündoğan Jasminder S. Sidhu Victoria Henderson Luca Mazzarella Janik Wolters Daniel K. L. Oi Markus Krutzik
author_facet	Mustafa Gündoğan Jasminder S. Sidhu Victoria Henderson Luca Mazzarella Janik Wolters Daniel K. L. Oi Markus Krutzik
author_sort	Mustafa Gündoğan
title	Proposal for space-borne quantum memories for global quantum networking
title_short	Proposal for space-borne quantum memories for global quantum networking
title_full	Proposal for space-borne quantum memories for global quantum networking
title_fullStr	Proposal for space-borne quantum memories for global quantum networking
title_full_unstemmed	Proposal for space-borne quantum memories for global quantum networking
title_sort	proposal for space-borne quantum memories for global quantum networking
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b6b4d75dbf9e42d6a9c2f2956fa78cc5
work_keys_str_mv	AT mustafagundogan proposalforspacebornequantummemoriesforglobalquantumnetworking AT jasminderssidhu proposalforspacebornequantummemoriesforglobalquantumnetworking AT victoriahenderson proposalforspacebornequantummemoriesforglobalquantumnetworking AT lucamazzarella proposalforspacebornequantummemoriesforglobalquantumnetworking AT janikwolters proposalforspacebornequantummemoriesforglobalquantumnetworking AT danielkloi proposalforspacebornequantummemoriesforglobalquantumnetworking AT markuskrutzik proposalforspacebornequantummemoriesforglobalquantumnetworking
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Proposal for space-borne quantum memories for global quantum networking

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