Focusing of quantum gate interactions using dynamical decoupling

• URL: http://arxiv.org/abs/2309.02125v1
• Date: Tue, 5 Sep 2023 11:01:38 GMT
• Title: Focusing of quantum gate interactions using dynamical decoupling
• Authors: M. C. Smith and A. D. Leu and M. F. Gely and D. M. Lucas
• Abstract summary: In 1995, Cirac and Zoller proposed the first concrete implementation of a small-scale quantum computer. Here we propose a method to focus entangling gate interactions, but driven by microwave fields, to micron-sized zones. We demonstrate the ability to suppress the spin-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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In 1995, Cirac and Zoller proposed the first concrete implementation of a small-scale quantum computer, using laser beams focused to micron spot sizes to address individual trapped ions in a linear crystal. Here we propose a method to focus entangling gate interactions, but driven by microwave fields, to micron-sized zones, corresponding to $10^{-5}$ microwave wavelengths. We demonstrate the ability to suppress the spin-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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