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Quantum computing

Electrical control of qubits speeds up

Nature Electronics volume 6, page 103 (2023)Cite this article

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The researchers — who are based at the University of New South Wales, Diraq, Keio University, Leibniz-Institut für Kristallzüchtung, VITCON Projectconsult GmbH, and Simon Fraser University — use a dense arrangement of qubits and electrodes to control the energy potential landscape and form quantum dots with tunable energy spectra. The qubits are toggled between an idle state and a hybridized state where spin–orbit effects, in combination with a pulse of microwaves, can be used to electrically control the spin rotation. The team show fast electrical control in multiple devices, with π/2 rotation of single-qubit gates in 3 ns, a coherence time of 50 μs, and gate fidelities of 99.93%, which is above the threshold for error-corrected fault tolerance.

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  • 23 March 2023

    In the version of this article initially published, the second sentence of text, now reading "In silicon quantum dots, on-chip integration of micromagnets or stripline antennas can be used to provide qubit control," was phrased inaccurately, reading as "In silicon quantum dots, the intrinsic spin–orbit coupling is weak but can be enhanced through on-chip integration of micromagnets or stripline antennas"; the sentence has been updated in the HTML and PDF versions of the article.

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  1. Nature Electronics https://www.nature.com/natelectron/

    Katharina Zeissler

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  1. Katharina Zeissler
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Correspondence to Katharina Zeissler.

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Zeissler, K. Electrical control of qubits speeds up. Nat Electron 6, 103 (2023). https://doi.org/10.1038/s41928-023-00935-x

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  • DOI: https://doi.org/10.1038/s41928-023-00935-x

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