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Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device
Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single-donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. However, manufacturing a...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794236/ https://www.ncbi.nlm.nih.gov/pubmed/33420013 http://dx.doi.org/10.1038/s41467-020-20424-5 |
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author | Ma̧dzik, Mateusz T. Laucht, Arne Hudson, Fay E. Jakob, Alexander M. Johnson, Brett C. Jamieson, David N. Itoh, Kohei M. Dzurak, Andrew S. Morello, Andrea |
author_facet | Ma̧dzik, Mateusz T. Laucht, Arne Hudson, Fay E. Jakob, Alexander M. Johnson, Brett C. Jamieson, David N. Itoh, Kohei M. Dzurak, Andrew S. Morello, Andrea |
author_sort | Ma̧dzik, Mateusz T. |
collection | PubMed |
description | Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single-donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. However, manufacturing a scalable quantum processor with this method is considered challenging, because of the exponential sensitivity of the exchange interaction that mediates the coupling between the qubits. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of (31)P donors implanted in silicon. The coupling strength, J = 32.06 ± 0.06 MHz, is measured spectroscopically with high precision. Since the coupling is weaker than the electron-nuclear hyperfine coupling A ≈ 90 MHz which detunes the two electrons, a native two-qubit controlled-rotation gate can be obtained via a simple electron spin resonance pulse. This scheme is insensitive to the precise value of J, which makes it suitable for the scale-up of donor-based quantum computers in silicon that exploit the metal-oxide-semiconductor fabrication protocols commonly used in the classical electronics industry. |
format | Online Article Text |
id | pubmed-7794236 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-77942362021-01-15 Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device Ma̧dzik, Mateusz T. Laucht, Arne Hudson, Fay E. Jakob, Alexander M. Johnson, Brett C. Jamieson, David N. Itoh, Kohei M. Dzurak, Andrew S. Morello, Andrea Nat Commun Article Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single-donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. However, manufacturing a scalable quantum processor with this method is considered challenging, because of the exponential sensitivity of the exchange interaction that mediates the coupling between the qubits. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of (31)P donors implanted in silicon. The coupling strength, J = 32.06 ± 0.06 MHz, is measured spectroscopically with high precision. Since the coupling is weaker than the electron-nuclear hyperfine coupling A ≈ 90 MHz which detunes the two electrons, a native two-qubit controlled-rotation gate can be obtained via a simple electron spin resonance pulse. This scheme is insensitive to the precise value of J, which makes it suitable for the scale-up of donor-based quantum computers in silicon that exploit the metal-oxide-semiconductor fabrication protocols commonly used in the classical electronics industry. Nature Publishing Group UK 2021-01-08 /pmc/articles/PMC7794236/ /pubmed/33420013 http://dx.doi.org/10.1038/s41467-020-20424-5 Text en © The Author(s) 2021 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/. |
spellingShingle | Article Ma̧dzik, Mateusz T. Laucht, Arne Hudson, Fay E. Jakob, Alexander M. Johnson, Brett C. Jamieson, David N. Itoh, Kohei M. Dzurak, Andrew S. Morello, Andrea Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title | Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title_full | Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title_fullStr | Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title_full_unstemmed | Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title_short | Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device |
title_sort | conditional quantum operation of two exchange-coupled single-donor spin qubits in a mos-compatible silicon device |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794236/ https://www.ncbi.nlm.nih.gov/pubmed/33420013 http://dx.doi.org/10.1038/s41467-020-20424-5 |
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