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arXiv · 2309.02125

Individually-addressed quantum gate interactions using dynamical decoupling

M. C. Smith·A. D. Leu·M. F. Gely·D. M. Lucas
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Abstract

A leading approach to implementing small-scale quantum computers has been to use laser beams, focused to micron spot sizes, to address and entangle trapped ions in a linear crystal. Here we propose a method to implement individually-addressed entangling gate interactions, but driven by microwave fields, with a spatial-resolution of a few microns, corresponding to $10^{-5}$ microwave wavelengths. We experimentally demonstrate the ability to suppress the effect of the state-dependent force using a single ion, and find the required interaction introduces $3.7(4)\times 10^{-4}$ error per emulated gate in a single-qubit benchmarking sequence. We model the scheme for a 17-qubit ion crystal, and find that any pair of ions should be addressable with an average crosstalk error of $\sim 10^{-5}$.

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M. C. Smith, A. D. Leu, M. F. Gely, D. M. Lucas. 2023-09-05. Individually-addressed quantum gate interactions using dynamical decoupling. https://doi.org/10.1103/prxquantum.5.030321

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