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A shuttling-based two-qubit logic gate for linking distant silicon quantum processors
Control of entanglement between qubits at distant quantum processors using a two-qubit gate is an essential function of a scalable, modular implementation of quantum computation. Among the many qubit platforms, spin qubits in silicon quantum dots are promising for large-scale integration along with...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9525571/ https://www.ncbi.nlm.nih.gov/pubmed/36180449 http://dx.doi.org/10.1038/s41467-022-33453-z |
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author | Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo |
author_facet | Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo |
author_sort | Noiri, Akito |
collection | PubMed |
description | Control of entanglement between qubits at distant quantum processors using a two-qubit gate is an essential function of a scalable, modular implementation of quantum computation. Among the many qubit platforms, spin qubits in silicon quantum dots are promising for large-scale integration along with their nanofabrication capability. However, linking distant silicon quantum processors is challenging as two-qubit gates in spin qubits typically utilize short-range exchange coupling, which is only effective between nearest-neighbor quantum dots. Here we demonstrate a two-qubit gate between spin qubits via coherent spin shuttling, a key technology for linking distant silicon quantum processors. Coherent shuttling of a spin qubit enables efficient switching of the exchange coupling with an on/off ratio exceeding 1000, while preserving the spin coherence by 99.6% for the single shuttling between neighboring dots. With this shuttling-mode exchange control, we demonstrate a two-qubit controlled-phase gate with a fidelity of 93%, assessed via randomized benchmarking. Combination of our technique and a phase coherent shuttling of a qubit across a large quantum dot array will provide feasible path toward a quantum link between distant silicon quantum processors, a key requirement for large-scale quantum computation. |
format | Online Article Text |
id | pubmed-9525571 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-95255712022-10-02 A shuttling-based two-qubit logic gate for linking distant silicon quantum processors Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo Nat Commun Article Control of entanglement between qubits at distant quantum processors using a two-qubit gate is an essential function of a scalable, modular implementation of quantum computation. Among the many qubit platforms, spin qubits in silicon quantum dots are promising for large-scale integration along with their nanofabrication capability. However, linking distant silicon quantum processors is challenging as two-qubit gates in spin qubits typically utilize short-range exchange coupling, which is only effective between nearest-neighbor quantum dots. Here we demonstrate a two-qubit gate between spin qubits via coherent spin shuttling, a key technology for linking distant silicon quantum processors. Coherent shuttling of a spin qubit enables efficient switching of the exchange coupling with an on/off ratio exceeding 1000, while preserving the spin coherence by 99.6% for the single shuttling between neighboring dots. With this shuttling-mode exchange control, we demonstrate a two-qubit controlled-phase gate with a fidelity of 93%, assessed via randomized benchmarking. Combination of our technique and a phase coherent shuttling of a qubit across a large quantum dot array will provide feasible path toward a quantum link between distant silicon quantum processors, a key requirement for large-scale quantum computation. Nature Publishing Group UK 2022-09-30 /pmc/articles/PMC9525571/ /pubmed/36180449 http://dx.doi.org/10.1038/s41467-022-33453-z Text en © The Author(s) 2022, corrected publication 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title | A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title_full | A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title_fullStr | A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title_full_unstemmed | A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title_short | A shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
title_sort | shuttling-based two-qubit logic gate for linking distant silicon quantum processors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9525571/ https://www.ncbi.nlm.nih.gov/pubmed/36180449 http://dx.doi.org/10.1038/s41467-022-33453-z |
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