Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet

Abstract Recent experimental breakthroughs in satellite quantum communications have opened up the possibility of creating a global quantum internet using satellite links. This approach appears to be particularly viable in the near term, due to the lower attenuation of optical signals from satellite...

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Autores principales:	Sumeet Khatri, Anthony J. Brady, Renée A. Desporte, Manon P. Bart, Jonathan P. Dowling
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/ab2478e8779d4dac8b2f08fe91e92ddd
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spelling	oai:doaj.org-article:ab2478e8779d4dac8b2f08fe91e92ddd2021-12-02T15:13:02ZSpooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet10.1038/s41534-020-00327-52056-6387https://doaj.org/article/ab2478e8779d4dac8b2f08fe91e92ddd2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00327-5https://doaj.org/toc/2056-6387Abstract Recent experimental breakthroughs in satellite quantum communications have opened up the possibility of creating a global quantum internet using satellite links. This approach appears to be particularly viable in the near term, due to the lower attenuation of optical signals from satellite to ground, and due to the currently short coherence times of quantum memories. The latter prevents ground-based entanglement distribution using atmospheric or optical-fiber links at high rates over long distances. In this work, we propose a global-scale quantum internet consisting of a constellation of orbiting satellites that provides a continuous, on-demand entanglement distribution service to ground stations. The satellites can also function as untrusted nodes for the purpose of long-distance quantum-key distribution. We develop a technique for determining optimal satellite configurations with continuous coverage that balances both the total number of satellites and entanglement-distribution rates. Using this technique, we determine various optimal satellite configurations for a polar-orbit constellation, and we analyze the resulting satellite-to-ground loss and achievable entanglement-distribution rates for multiple ground station configurations. We also provide a comparison between these entanglement-distribution rates and the rates of ground-based quantum repeater schemes. Overall, our work provides the theoretical tools and the experimental guidance needed to make a satellite-based global quantum internet a reality.Sumeet KhatriAnthony J. BradyRenée A. DesporteManon P. BartJonathan P. DowlingNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-15 (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 Sumeet Khatri Anthony J. Brady Renée A. Desporte Manon P. Bart Jonathan P. Dowling Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
description	Abstract Recent experimental breakthroughs in satellite quantum communications have opened up the possibility of creating a global quantum internet using satellite links. This approach appears to be particularly viable in the near term, due to the lower attenuation of optical signals from satellite to ground, and due to the currently short coherence times of quantum memories. The latter prevents ground-based entanglement distribution using atmospheric or optical-fiber links at high rates over long distances. In this work, we propose a global-scale quantum internet consisting of a constellation of orbiting satellites that provides a continuous, on-demand entanglement distribution service to ground stations. The satellites can also function as untrusted nodes for the purpose of long-distance quantum-key distribution. We develop a technique for determining optimal satellite configurations with continuous coverage that balances both the total number of satellites and entanglement-distribution rates. Using this technique, we determine various optimal satellite configurations for a polar-orbit constellation, and we analyze the resulting satellite-to-ground loss and achievable entanglement-distribution rates for multiple ground station configurations. We also provide a comparison between these entanglement-distribution rates and the rates of ground-based quantum repeater schemes. Overall, our work provides the theoretical tools and the experimental guidance needed to make a satellite-based global quantum internet a reality.
format	article
author	Sumeet Khatri Anthony J. Brady Renée A. Desporte Manon P. Bart Jonathan P. Dowling
author_facet	Sumeet Khatri Anthony J. Brady Renée A. Desporte Manon P. Bart Jonathan P. Dowling
author_sort	Sumeet Khatri
title	Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
title_short	Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
title_full	Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
title_fullStr	Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
title_full_unstemmed	Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
title_sort	spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ab2478e8779d4dac8b2f08fe91e92ddd
work_keys_str_mv	AT sumeetkhatri spookyactionataglobaldistanceanalysisofspacebasedentanglementdistributionforthequantuminternet AT anthonyjbrady spookyactionataglobaldistanceanalysisofspacebasedentanglementdistributionforthequantuminternet AT reneeadesporte spookyactionataglobaldistanceanalysisofspacebasedentanglementdistributionforthequantuminternet AT manonpbart spookyactionataglobaldistanceanalysisofspacebasedentanglementdistributionforthequantuminternet AT jonathanpdowling spookyactionataglobaldistanceanalysisofspacebasedentanglementdistributionforthequantuminternet
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Spooky action at a global distance: analysis of space-based entanglement distribution for the quantum internet

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