Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels

Abstract We solve the entanglement-assisted (EA) classical capacity region of quantum multiple-access channels (MACs) with an arbitrary number of senders. As an example, we consider the bosonic thermal-loss MAC and solve the one-shot capacity region enabled by an entanglement source composed of send...

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Autores principales:	Haowei Shi, Min-Hsiu Hsieh, Saikat Guha, Zheshen Zhang, Quntao Zhuang
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/6bdea2fb45434a0a83f05d11c8d1b676
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spelling	oai:doaj.org-article:6bdea2fb45434a0a83f05d11c8d1b6762021-12-02T14:59:13ZEntanglement-assisted capacity regions and protocol designs for quantum multiple-access channels10.1038/s41534-021-00412-32056-6387https://doaj.org/article/6bdea2fb45434a0a83f05d11c8d1b6762021-05-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00412-3https://doaj.org/toc/2056-6387Abstract We solve the entanglement-assisted (EA) classical capacity region of quantum multiple-access channels (MACs) with an arbitrary number of senders. As an example, we consider the bosonic thermal-loss MAC and solve the one-shot capacity region enabled by an entanglement source composed of sender-receiver pairwise two-mode squeezed vacuum states. The EA capacity region is strictly larger than the capacity region without entanglement-assistance. With two-mode squeezed vacuum states as the source and phase modulation as the encoding, we also design practical receiver protocols to realize the entanglement advantages. Four practical receiver designs, based on optical parametric amplifiers, are given and analyzed. In the parameter region of a large noise background, the receivers can enable a simultaneous rate advantage of 82.0% for each sender. Due to teleportation and superdense coding, our results for EA classical communication can be directly extended to EA quantum communication at half of the rates. Our work provides a unique and practical network communication scenario where entanglement can be beneficial.Haowei ShiMin-Hsiu HsiehSaikat GuhaZheshen ZhangQuntao ZhuangNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-9 (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 Haowei Shi Min-Hsiu Hsieh Saikat Guha Zheshen Zhang Quntao Zhuang Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
description	Abstract We solve the entanglement-assisted (EA) classical capacity region of quantum multiple-access channels (MACs) with an arbitrary number of senders. As an example, we consider the bosonic thermal-loss MAC and solve the one-shot capacity region enabled by an entanglement source composed of sender-receiver pairwise two-mode squeezed vacuum states. The EA capacity region is strictly larger than the capacity region without entanglement-assistance. With two-mode squeezed vacuum states as the source and phase modulation as the encoding, we also design practical receiver protocols to realize the entanglement advantages. Four practical receiver designs, based on optical parametric amplifiers, are given and analyzed. In the parameter region of a large noise background, the receivers can enable a simultaneous rate advantage of 82.0% for each sender. Due to teleportation and superdense coding, our results for EA classical communication can be directly extended to EA quantum communication at half of the rates. Our work provides a unique and practical network communication scenario where entanglement can be beneficial.
format	article
author	Haowei Shi Min-Hsiu Hsieh Saikat Guha Zheshen Zhang Quntao Zhuang
author_facet	Haowei Shi Min-Hsiu Hsieh Saikat Guha Zheshen Zhang Quntao Zhuang
author_sort	Haowei Shi
title	Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
title_short	Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
title_full	Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
title_fullStr	Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
title_full_unstemmed	Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
title_sort	entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6bdea2fb45434a0a83f05d11c8d1b676
work_keys_str_mv	AT haoweishi entanglementassistedcapacityregionsandprotocoldesignsforquantummultipleaccesschannels AT minhsiuhsieh entanglementassistedcapacityregionsandprotocoldesignsforquantummultipleaccesschannels AT saikatguha entanglementassistedcapacityregionsandprotocoldesignsforquantummultipleaccesschannels AT zheshenzhang entanglementassistedcapacityregionsandprotocoldesignsforquantummultipleaccesschannels AT quntaozhuang entanglementassistedcapacityregionsandprotocoldesignsforquantummultipleaccesschannels
_version_	1718389207107371008

Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels

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