Designs for a two-dimensional Si quantum dot array with spin qubit addressability

Abstract Electron spins in Si are an attractive platform for quantum computation, backed with their scalability and fast, high-fidelity quantum logic gates. Despite the importance of two-dimensional integration with efficient connectivity between qubits for medium- to large-scale quantum computation...

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Autores principales:	Masahiro Tadokoro, Takashi Nakajima, Takashi Kobayashi, Kenta Takeda, Akito Noiri, Kaito Tomari, Jun Yoneda, Seigo Tarucha, Tetsuo Kodera
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3f28f364446d4621866c4891999b847c
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spelling	oai:doaj.org-article:3f28f364446d4621866c4891999b847c2021-12-02T17:18:22ZDesigns for a two-dimensional Si quantum dot array with spin qubit addressability10.1038/s41598-021-98212-42045-2322https://doaj.org/article/3f28f364446d4621866c4891999b847c2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98212-4https://doaj.org/toc/2045-2322Abstract Electron spins in Si are an attractive platform for quantum computation, backed with their scalability and fast, high-fidelity quantum logic gates. Despite the importance of two-dimensional integration with efficient connectivity between qubits for medium- to large-scale quantum computation, however, a practical device design that guarantees qubit addressability is yet to be seen. Here, we propose a practical 3 × 3 quantum dot device design and a larger-scale design as a longer-term target. The design goal is to realize qubit connectivity to the four nearest neighbors while ensuring addressability. We show that a 3 × 3 quantum dot array can execute four-qubit Grover’s algorithm more efficiently than the one-dimensional counterpart. To scale up the two-dimensional array beyond 3 × 3, we propose a novel structure with ferromagnetic gate electrodes. Our results showcase the possibility of medium-sized quantum processors in Si with fast quantum logic gates and long coherence times.Masahiro TadokoroTakashi NakajimaTakashi KobayashiKenta TakedaAkito NoiriKaito TomariJun YonedaSeigo TaruchaTetsuo KoderaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Masahiro Tadokoro Takashi Nakajima Takashi Kobayashi Kenta Takeda Akito Noiri Kaito Tomari Jun Yoneda Seigo Tarucha Tetsuo Kodera Designs for a two-dimensional Si quantum dot array with spin qubit addressability
description	Abstract Electron spins in Si are an attractive platform for quantum computation, backed with their scalability and fast, high-fidelity quantum logic gates. Despite the importance of two-dimensional integration with efficient connectivity between qubits for medium- to large-scale quantum computation, however, a practical device design that guarantees qubit addressability is yet to be seen. Here, we propose a practical 3 × 3 quantum dot device design and a larger-scale design as a longer-term target. The design goal is to realize qubit connectivity to the four nearest neighbors while ensuring addressability. We show that a 3 × 3 quantum dot array can execute four-qubit Grover’s algorithm more efficiently than the one-dimensional counterpart. To scale up the two-dimensional array beyond 3 × 3, we propose a novel structure with ferromagnetic gate electrodes. Our results showcase the possibility of medium-sized quantum processors in Si with fast quantum logic gates and long coherence times.
format	article
author	Masahiro Tadokoro Takashi Nakajima Takashi Kobayashi Kenta Takeda Akito Noiri Kaito Tomari Jun Yoneda Seigo Tarucha Tetsuo Kodera
author_facet	Masahiro Tadokoro Takashi Nakajima Takashi Kobayashi Kenta Takeda Akito Noiri Kaito Tomari Jun Yoneda Seigo Tarucha Tetsuo Kodera
author_sort	Masahiro Tadokoro
title	Designs for a two-dimensional Si quantum dot array with spin qubit addressability
title_short	Designs for a two-dimensional Si quantum dot array with spin qubit addressability
title_full	Designs for a two-dimensional Si quantum dot array with spin qubit addressability
title_fullStr	Designs for a two-dimensional Si quantum dot array with spin qubit addressability
title_full_unstemmed	Designs for a two-dimensional Si quantum dot array with spin qubit addressability
title_sort	designs for a two-dimensional si quantum dot array with spin qubit addressability
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3f28f364446d4621866c4891999b847c
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Designs for a two-dimensional Si quantum dot array with spin qubit addressability

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