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A single-hole spin qubit

Qubits based on quantum dots have excellent prospects for scalable quantum technology due to their compatibility with standard semiconductor manufacturing. While early research focused on the simpler electron system, recent demonstrations using multi-hole quantum dots illustrated the favourable prop...

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Autores principales: Hendrickx, N. W., Lawrie, W. I. L., Petit, L., Sammak, A., Scappucci, G., Veldhorst, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7351715/
https://www.ncbi.nlm.nih.gov/pubmed/32651363
http://dx.doi.org/10.1038/s41467-020-17211-7
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author Hendrickx, N. W.
Lawrie, W. I. L.
Petit, L.
Sammak, A.
Scappucci, G.
Veldhorst, M.
author_facet Hendrickx, N. W.
Lawrie, W. I. L.
Petit, L.
Sammak, A.
Scappucci, G.
Veldhorst, M.
author_sort Hendrickx, N. W.
collection PubMed
description Qubits based on quantum dots have excellent prospects for scalable quantum technology due to their compatibility with standard semiconductor manufacturing. While early research focused on the simpler electron system, recent demonstrations using multi-hole quantum dots illustrated the favourable properties holes can offer for fast and scalable quantum control. Here, we establish a single-hole spin qubit in germanium and demonstrate the integration of single-shot readout and quantum control. We deplete a planar germanium double quantum dot to the last hole, confirmed by radio-frequency reflectrometry charge sensing. To demonstrate the integration of single-shot readout and qubit operation, we show Rabi driving on both qubits. We find remarkable electric control over the qubit resonance frequencies, providing great qubit addressability. Finally, we analyse the spin relaxation time, which we find to exceed one millisecond, setting the benchmark for hole quantum dot qubits. The ability to coherently manipulate a single hole spin underpins the quality of strained germanium and defines an excellent starting point for the construction of quantum hardware.
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spelling pubmed-73517152020-07-13 A single-hole spin qubit Hendrickx, N. W. Lawrie, W. I. L. Petit, L. Sammak, A. Scappucci, G. Veldhorst, M. Nat Commun Article Qubits based on quantum dots have excellent prospects for scalable quantum technology due to their compatibility with standard semiconductor manufacturing. While early research focused on the simpler electron system, recent demonstrations using multi-hole quantum dots illustrated the favourable properties holes can offer for fast and scalable quantum control. Here, we establish a single-hole spin qubit in germanium and demonstrate the integration of single-shot readout and quantum control. We deplete a planar germanium double quantum dot to the last hole, confirmed by radio-frequency reflectrometry charge sensing. To demonstrate the integration of single-shot readout and qubit operation, we show Rabi driving on both qubits. We find remarkable electric control over the qubit resonance frequencies, providing great qubit addressability. Finally, we analyse the spin relaxation time, which we find to exceed one millisecond, setting the benchmark for hole quantum dot qubits. The ability to coherently manipulate a single hole spin underpins the quality of strained germanium and defines an excellent starting point for the construction of quantum hardware. Nature Publishing Group UK 2020-07-10 /pmc/articles/PMC7351715/ /pubmed/32651363 http://dx.doi.org/10.1038/s41467-020-17211-7 Text en © The Author(s) 2020 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
Hendrickx, N. W.
Lawrie, W. I. L.
Petit, L.
Sammak, A.
Scappucci, G.
Veldhorst, M.
A single-hole spin qubit
title A single-hole spin qubit
title_full A single-hole spin qubit
title_fullStr A single-hole spin qubit
title_full_unstemmed A single-hole spin qubit
title_short A single-hole spin qubit
title_sort single-hole spin qubit
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7351715/
https://www.ncbi.nlm.nih.gov/pubmed/32651363
http://dx.doi.org/10.1038/s41467-020-17211-7
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