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Proposal for space-borne quantum memories for global quantum networking

Mustafa, Mustafa and Sidhu, Jasminder S. and Henderson, Victoria and Mazzarella, Luca and Wolters, Janik and Oi, Daniel K. L. and Krutzik, Markus (2021) Proposal for space-borne quantum memories for global quantum networking. npj Quantum Information. Springer Nature. doi: 10.1038/s41534-021-00460-9. ISSN 2056-6387.

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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.

Item URL in elib:https://elib.dlr.de/143618/
Document Type:Article
Title:Proposal for space-borne quantum memories for global quantum networking
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mustafa, MustafaInstitüt für Physik, Humboldt-Universität zu Berlin, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Sidhu, Jasminder S.SUPA Department of Physics, University of Strathclyde, Glasgow, UKUNSPECIFIEDUNSPECIFIED
Henderson, VictoriaInstitüt für Physik, Humboldt-Universität zu Berlin, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Mazzarella, LucaSUPA Department of Physics, University of Strathclyde, Glasgow, UKUNSPECIFIEDUNSPECIFIED
Wolters, JanikUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Oi, Daniel K. L.SUPA Department of Physics, University of Strathclyde, Glasgow, UKUNSPECIFIEDUNSPECIFIED
Krutzik, MarkusInstitüt für Physik, Humboldt-Universität zu Berlin, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Date:18 August 2021
Journal or Publication Title:npj Quantum Information
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1038/s41534-021-00460-9
Publisher:Springer Nature
ISSN:2056-6387
Status:Published
Keywords:Quantenkommunikation, Quantenspeicher
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Detectors for optical instruments
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Wolters, Janik
Deposited On:27 Aug 2021 08:13
Last Modified:27 Aug 2021 08:13

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