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2021-08-18Zeitschriftenartikel DOI: 10.18452/24548
Proposal for space-borne quantum memories for global quantum networking
dc.contributor.authorGündoğan, Mustafa
dc.contributor.authorSidhu, Jasminder
dc.contributor.authorHenderson, Victoria
dc.contributor.authorMazzarella, Luca
dc.contributor.authorWolters, Janik
dc.contributor.authorOi, Daniel
dc.contributor.authorKrutzik, Markus
dc.date.accessioned2022-04-26T11:15:53Z
dc.date.available2022-04-26T11:15:53Z
dc.date.issued2021-08-18none
dc.identifier.other10.1038/s41534-021-00460-9
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25220
dc.description.abstractGlobal-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.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc530 Physiknone
dc.titleProposal for space-borne quantum memories for global quantum networkingnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25220-0
dc.identifier.doihttp://dx.doi.org/10.18452/24548
dc.type.versionpublishedVersionnone
local.edoc.container-titlenpj Quantum informationnone
local.edoc.pages10none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameNature Publ. Groupnone
local.edoc.container-publisher-placeLondonnone
local.edoc.container-volume7none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber128none
dc.identifier.eissn2056-6387

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