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  • Letter
  • Open Access

Robust and fast microwave-driven quantum logic for trapped-ion qubits

M. A. Weber, M. F. Gely, R. K. Hanley, T. P. Harty, A. D. Leu, C. M. Löschnauer, D. P. Nadlinger, and D. M. Lucas*

  • Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

  • *Contact author: david.lucas@physics.ox.ac.uk
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Phys. Rev. A 110, L010601 – Published 8 July, 2024

DOI: https://doi.org/10.1103/PhysRevA.110.L010601

Abstract

Microwave-driven logic is a promising alternative to laser control in scaling trapped-ion based quantum processors. We implement Mølmer-Sørensen two-qubit gates on 43Ca+ hyperfine clock qubits in a cryogenic (≈25 K) surface trap, driven by near-field microwaves. We achieve gate durations of 154 µs [with 1.0(2)% error] and 331 µs [0.5(1)% error], which approaches the performance of typical laser-driven gates. In the 331 µs gate, we demonstrate a Walsh-modulated dynamical decoupling scheme which suppresses errors due to fluctuations in the qubit frequency as well as imperfections in the decoupling drive itself.

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Phys. Rev. A 110, L010601– Published 8 July, 2024
  • Received 7 March 2024
  • Accepted 24 June 2024
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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