We present a new method for coherent control of trapped ion qubits in separate interaction regions of a multi-zone trap by simultaneously applying an electric field and a spin-dependent gradient. Both the phase and amplitude of the effective single-qubit rotation depend on the electric field, which can be localised to each zone. We demonstrate this interaction on a single ion using both laser-based and magnetic field gradients in a surface-electrode ion trap, and measure the localisation of the electric field.
@article{arxiv.2210.16129,
title = {Coherent Control of Trapped Ion Qubits with Localized Electric Fields},
author = {R. Srinivas and C. M. Löschnauer and M. Malinowski and A. C. Hughes and R. Nourshargh and V. Negnevitsky and D. T. C. Allcock and S. A. King and C. Matthiesen and T. P. Harty and C. J. Ballance},
journal= {arXiv preprint arXiv:2210.16129},
year = {2023}
}