Coherent Control of a Triangular Exchange-Only Spin Qubit
ORAL
Abstract
Until recently, spin qubit investigations were limited to linear arrays of spins. Here, we demonstrate a triple-quantum-dot (TQD) array with the quantum dots arranged in a close-packed triangular geometry [1]. Our characterization includes measurements of charge stability diagrams in the few-electron regime as well as the characterization of a TQD exchange-only (EO) qubit, which serves as a proxy for the coherent performance of the joint electronic spin state of the dots. Coherent performance in the triangular array is comparable to state-of-the-art demonstrations of EO qubits fabricated in a conventional linear geometry [2].
[1] E. Acuna et al., “Coherent control of a triangular exchange-only spin qubit,” Phys. Rev. Applied 22, 044057 (2024).
[2] A. J. Weinstein et al., “Universal logic with encoded spin qubits in silicon,” Nature 615, 817 (2023).
This work was supported by the Army Research Office grant nos. W911NF-24-1-0020 and W911NF-22-C-0022.
[1] E. Acuna et al., “Coherent control of a triangular exchange-only spin qubit,” Phys. Rev. Applied 22, 044057 (2024).
[2] A. J. Weinstein et al., “Universal logic with encoded spin qubits in silicon,” Nature 615, 817 (2023).
This work was supported by the Army Research Office grant nos. W911NF-24-1-0020 and W911NF-22-C-0022.
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Publication: [1] E. Acuna et al., "Coherent control of a triangular exchange-only spin qubit," Phys. Rev. Applied 22, 044057 (2024).<br>[2] A. J. Weinstein et al., "Universal logic with encoded spin qubits in silicon," Nature 615, 817 (2023).
Presenters
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Edwin Acuna
HRL Laboratories, LLC
Authors
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Edwin Acuna
HRL Laboratories, LLC
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Joseph D Broz
HRL Laboratories, LLC, HRL Laboratories
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Jason R Petta
HRL Laboratories, LLC; University of California, Los Angeles, University of California, Los Angeles