Genuine quantum networks with superposed tasks and addressing

Abstract We show how to make quantum networks, both standard and entanglement-based, genuine quantum by providing them with the possibility of handling superposed tasks and superposed addressing. This extension of their functionality relies on a quantum control register, which specifies not only the...

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Autores principales:	J. Miguel-Ramiro, A. Pirker, W. Dür
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/54e61a5fd4aa4279b10661a6cef94ee9
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spelling	oai:doaj.org-article:54e61a5fd4aa4279b10661a6cef94ee92021-12-02T17:19:13ZGenuine quantum networks with superposed tasks and addressing10.1038/s41534-021-00472-52056-6387https://doaj.org/article/54e61a5fd4aa4279b10661a6cef94ee92021-09-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00472-5https://doaj.org/toc/2056-6387Abstract We show how to make quantum networks, both standard and entanglement-based, genuine quantum by providing them with the possibility of handling superposed tasks and superposed addressing. This extension of their functionality relies on a quantum control register, which specifies not only the task of the network, but also the corresponding weights in a coherently superposed fashion. Although adding coherent control to classical tasks, such as sending or measuring—or not doing so—is in general impossible, we introduce protocols that are able to mimick this behavior under certain conditions. We achieve this by always performing the classical task, either on the desired state or a properly chosen dummy state. We provide several examples, and show that externally controlling quantum superposition of tasks offers additional possibilities and advantages over usually considered single functionality. For instance, superpositions of different target state configurations shared among different nodes of the network can be prepared, or quantum information can be sent among a superposition of different paths or to different destinations.J. Miguel-RamiroA. PirkerW. DürNature 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 J. Miguel-Ramiro A. Pirker W. Dür Genuine quantum networks with superposed tasks and addressing
description	Abstract We show how to make quantum networks, both standard and entanglement-based, genuine quantum by providing them with the possibility of handling superposed tasks and superposed addressing. This extension of their functionality relies on a quantum control register, which specifies not only the task of the network, but also the corresponding weights in a coherently superposed fashion. Although adding coherent control to classical tasks, such as sending or measuring—or not doing so—is in general impossible, we introduce protocols that are able to mimick this behavior under certain conditions. We achieve this by always performing the classical task, either on the desired state or a properly chosen dummy state. We provide several examples, and show that externally controlling quantum superposition of tasks offers additional possibilities and advantages over usually considered single functionality. For instance, superpositions of different target state configurations shared among different nodes of the network can be prepared, or quantum information can be sent among a superposition of different paths or to different destinations.
format	article
author	J. Miguel-Ramiro A. Pirker W. Dür
author_facet	J. Miguel-Ramiro A. Pirker W. Dür
author_sort	J. Miguel-Ramiro
title	Genuine quantum networks with superposed tasks and addressing
title_short	Genuine quantum networks with superposed tasks and addressing
title_full	Genuine quantum networks with superposed tasks and addressing
title_fullStr	Genuine quantum networks with superposed tasks and addressing
title_full_unstemmed	Genuine quantum networks with superposed tasks and addressing
title_sort	genuine quantum networks with superposed tasks and addressing
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/54e61a5fd4aa4279b10661a6cef94ee9
work_keys_str_mv	AT jmiguelramiro genuinequantumnetworkswithsuperposedtasksandaddressing AT apirker genuinequantumnetworkswithsuperposedtasksandaddressing AT wdur genuinequantumnetworkswithsuperposedtasksandaddressing
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Genuine quantum networks with superposed tasks and addressing

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