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Single-electron Spin Resonance in a Quadruple Quantum Dot

Electron spins in semiconductor quantum dots are good candidates of quantum bits for quantum information processing. Basic operations of the qubit have been realized in recent years: initialization, manipulation of single spins, two qubit entanglement operations, and readout. Now it becomes crucial...

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Autores principales: Otsuka, Tomohiro, Nakajima, Takashi, Delbecq, Matthieu R., Amaha, Shinichi, Yoneda, Jun, Takeda, Kenta, Allison, Giles, Ito, Takumi, Sugawara, Retsu, Noiri, Akito, Ludwig, Arne, Wieck, Andreas D., Tarucha, Seigo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4994114/
https://www.ncbi.nlm.nih.gov/pubmed/27550534
http://dx.doi.org/10.1038/srep31820
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author Otsuka, Tomohiro
Nakajima, Takashi
Delbecq, Matthieu R.
Amaha, Shinichi
Yoneda, Jun
Takeda, Kenta
Allison, Giles
Ito, Takumi
Sugawara, Retsu
Noiri, Akito
Ludwig, Arne
Wieck, Andreas D.
Tarucha, Seigo
author_facet Otsuka, Tomohiro
Nakajima, Takashi
Delbecq, Matthieu R.
Amaha, Shinichi
Yoneda, Jun
Takeda, Kenta
Allison, Giles
Ito, Takumi
Sugawara, Retsu
Noiri, Akito
Ludwig, Arne
Wieck, Andreas D.
Tarucha, Seigo
author_sort Otsuka, Tomohiro
collection PubMed
description Electron spins in semiconductor quantum dots are good candidates of quantum bits for quantum information processing. Basic operations of the qubit have been realized in recent years: initialization, manipulation of single spins, two qubit entanglement operations, and readout. Now it becomes crucial to demonstrate scalability of this architecture by conducting spin operations on a scaled up system. Here, we demonstrate single-electron spin resonance in a quadruple quantum dot. A few-electron quadruple quantum dot is formed within a magnetic field gradient created by a micro-magnet. We oscillate the wave functions of the electrons in the quantum dots by applying microwave voltages and this induces electron spin resonance. The resonance energies of the four quantum dots are slightly different because of the stray field created by the micro-magnet and therefore frequency-resolved addressable control of each electron spin resonance is possible.
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spelling pubmed-49941142016-08-30 Single-electron Spin Resonance in a Quadruple Quantum Dot Otsuka, Tomohiro Nakajima, Takashi Delbecq, Matthieu R. Amaha, Shinichi Yoneda, Jun Takeda, Kenta Allison, Giles Ito, Takumi Sugawara, Retsu Noiri, Akito Ludwig, Arne Wieck, Andreas D. Tarucha, Seigo Sci Rep Article Electron spins in semiconductor quantum dots are good candidates of quantum bits for quantum information processing. Basic operations of the qubit have been realized in recent years: initialization, manipulation of single spins, two qubit entanglement operations, and readout. Now it becomes crucial to demonstrate scalability of this architecture by conducting spin operations on a scaled up system. Here, we demonstrate single-electron spin resonance in a quadruple quantum dot. A few-electron quadruple quantum dot is formed within a magnetic field gradient created by a micro-magnet. We oscillate the wave functions of the electrons in the quantum dots by applying microwave voltages and this induces electron spin resonance. The resonance energies of the four quantum dots are slightly different because of the stray field created by the micro-magnet and therefore frequency-resolved addressable control of each electron spin resonance is possible. Nature Publishing Group 2016-08-23 /pmc/articles/PMC4994114/ /pubmed/27550534 http://dx.doi.org/10.1038/srep31820 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Otsuka, Tomohiro
Nakajima, Takashi
Delbecq, Matthieu R.
Amaha, Shinichi
Yoneda, Jun
Takeda, Kenta
Allison, Giles
Ito, Takumi
Sugawara, Retsu
Noiri, Akito
Ludwig, Arne
Wieck, Andreas D.
Tarucha, Seigo
Single-electron Spin Resonance in a Quadruple Quantum Dot
title Single-electron Spin Resonance in a Quadruple Quantum Dot
title_full Single-electron Spin Resonance in a Quadruple Quantum Dot
title_fullStr Single-electron Spin Resonance in a Quadruple Quantum Dot
title_full_unstemmed Single-electron Spin Resonance in a Quadruple Quantum Dot
title_short Single-electron Spin Resonance in a Quadruple Quantum Dot
title_sort single-electron spin resonance in a quadruple quantum dot
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4994114/
https://www.ncbi.nlm.nih.gov/pubmed/27550534
http://dx.doi.org/10.1038/srep31820
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