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Carbon defect qubit in two-dimensional WS(2)
Identifying and fabricating defect qubits in two-dimensional semiconductors are of great interest in exploring candidates for quantum information and sensing applications. A milestone has been recently achieved by demonstrating that single defect, a carbon atom substituting sulphur atom in single la...
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/PMC8904548/ https://www.ncbi.nlm.nih.gov/pubmed/35260586 http://dx.doi.org/10.1038/s41467-022-28876-7 |
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author | Li, Song Thiering, Gergő Udvarhelyi, Péter Ivády, Viktor Gali, Adam |
author_facet | Li, Song Thiering, Gergő Udvarhelyi, Péter Ivády, Viktor Gali, Adam |
author_sort | Li, Song |
collection | PubMed |
description | Identifying and fabricating defect qubits in two-dimensional semiconductors are of great interest in exploring candidates for quantum information and sensing applications. A milestone has been recently achieved by demonstrating that single defect, a carbon atom substituting sulphur atom in single layer tungsten disulphide, can be engineered on demand at atomic size level precision, which holds a promise for a scalable and addressable unit. It is an immediate quest to reveal its potential as a qubit. To this end, we determine its electronic structure and optical properties from first principles. We identify the fingerprint of the neutral charge state of the defect in the scanning tunnelling spectrum. In the neutral defect, the giant spin-orbit coupling mixes the singlet and triplet excited states with resulting in phosphorescence at the telecom band that can be used to read out the spin state, and coherent driving with microwave excitation is also viable. Our results establish a scalable qubit in a two-dimensional material with spin-photon interface at the telecom wavelength region. |
format | Online Article Text |
id | pubmed-8904548 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-89045482022-03-23 Carbon defect qubit in two-dimensional WS(2) Li, Song Thiering, Gergő Udvarhelyi, Péter Ivády, Viktor Gali, Adam Nat Commun Article Identifying and fabricating defect qubits in two-dimensional semiconductors are of great interest in exploring candidates for quantum information and sensing applications. A milestone has been recently achieved by demonstrating that single defect, a carbon atom substituting sulphur atom in single layer tungsten disulphide, can be engineered on demand at atomic size level precision, which holds a promise for a scalable and addressable unit. It is an immediate quest to reveal its potential as a qubit. To this end, we determine its electronic structure and optical properties from first principles. We identify the fingerprint of the neutral charge state of the defect in the scanning tunnelling spectrum. In the neutral defect, the giant spin-orbit coupling mixes the singlet and triplet excited states with resulting in phosphorescence at the telecom band that can be used to read out the spin state, and coherent driving with microwave excitation is also viable. Our results establish a scalable qubit in a two-dimensional material with spin-photon interface at the telecom wavelength region. Nature Publishing Group UK 2022-03-08 /pmc/articles/PMC8904548/ /pubmed/35260586 http://dx.doi.org/10.1038/s41467-022-28876-7 Text en © The Author(s) 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 Li, Song Thiering, Gergő Udvarhelyi, Péter Ivády, Viktor Gali, Adam Carbon defect qubit in two-dimensional WS(2) |
title | Carbon defect qubit in two-dimensional WS(2) |
title_full | Carbon defect qubit in two-dimensional WS(2) |
title_fullStr | Carbon defect qubit in two-dimensional WS(2) |
title_full_unstemmed | Carbon defect qubit in two-dimensional WS(2) |
title_short | Carbon defect qubit in two-dimensional WS(2) |
title_sort | carbon defect qubit in two-dimensional ws(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8904548/ https://www.ncbi.nlm.nih.gov/pubmed/35260586 http://dx.doi.org/10.1038/s41467-022-28876-7 |
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