Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires

Abstract We show here how to create macroscopic quantum states in a semiconductor device: a chain of InAs quantum dots embedded in an InP nanowire. Filling the nanowire with 4 electrons per dot creates a synthetic spin-one chain, with four-fold degenerate topological ground state protected by a Hald...

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Autores principales:	Blazej Jaworowski, Nick Rogers, Marek Grabowski, Pawel Hawrylak
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cc16c8f9a04247cab92192a308313b76
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spelling	oai:doaj.org-article:cc16c8f9a04247cab92192a308313b762021-12-02T12:32:29ZMacroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires10.1038/s41598-017-05655-92045-2322https://doaj.org/article/cc16c8f9a04247cab92192a308313b762017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05655-9https://doaj.org/toc/2045-2322Abstract We show here how to create macroscopic quantum states in a semiconductor device: a chain of InAs quantum dots embedded in an InP nanowire. Filling the nanowire with 4 electrons per dot creates a synthetic spin-one chain, with four-fold degenerate topological ground state protected by a Haldane gap. The four states correspond to two spin-½ quasiparticles localised at the ends of the macroscopic wire. The quasiparticle spins are mapped onto a robust, macroscopic, singlet-triplet qubit. These predictions are supported by a microscopic theory and extensive numerical simulations.Blazej JaworowskiNick RogersMarek GrabowskiPawel HawrylakNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Blazej Jaworowski Nick Rogers Marek Grabowski Pawel Hawrylak Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
description	Abstract We show here how to create macroscopic quantum states in a semiconductor device: a chain of InAs quantum dots embedded in an InP nanowire. Filling the nanowire with 4 electrons per dot creates a synthetic spin-one chain, with four-fold degenerate topological ground state protected by a Haldane gap. The four states correspond to two spin-½ quasiparticles localised at the ends of the macroscopic wire. The quasiparticle spins are mapped onto a robust, macroscopic, singlet-triplet qubit. These predictions are supported by a microscopic theory and extensive numerical simulations.
format	article
author	Blazej Jaworowski Nick Rogers Marek Grabowski Pawel Hawrylak
author_facet	Blazej Jaworowski Nick Rogers Marek Grabowski Pawel Hawrylak
author_sort	Blazej Jaworowski
title	Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
title_short	Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
title_full	Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
title_fullStr	Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
title_full_unstemmed	Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires
title_sort	macroscopic singlet-triplet qubit in synthetic spin-one chain in semiconductor nanowires
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/cc16c8f9a04247cab92192a308313b76
work_keys_str_mv	AT blazejjaworowski macroscopicsinglettripletqubitinsyntheticspinonechaininsemiconductornanowires AT nickrogers macroscopicsinglettripletqubitinsyntheticspinonechaininsemiconductornanowires AT marekgrabowski macroscopicsinglettripletqubitinsyntheticspinonechaininsemiconductornanowires AT pawelhawrylak macroscopicsinglettripletqubitinsyntheticspinonechaininsemiconductornanowires
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Macroscopic Singlet-Triplet Qubit in Synthetic Spin-One Chain in Semiconductor Nanowires

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