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

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

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 <sup>43</sup>⁢Ca<sup>+</sup> hyperfine clock qubits in a cryogenic ( ≈25 K) surface trap, driven by near-field m...

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Bibliographic Details
Main Authors: Weber, MA, Gely, MF, Hanley, RK, Harty, TP, Leu, AD, Löschnauer, CM, Nadlinger, DP, Lucas, DM
Format: Journal article
Language:English
Published: American Physical Society 2024
Description
Summary: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 <sup>43</sup>⁢Ca<sup>+</sup> 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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