Coherent Control of Trapped Ion Qubits with Localized Electric Fields

TL;DR

This paper introduces a method for precise, localized control of trapped ion qubits using electric fields and spin-dependent gradients, enabling targeted quantum operations in multi-zone traps.

Contribution

It presents a novel approach combining electric fields and spin-dependent gradients for localized qubit control in multi-zone ion traps.

Findings

Successful demonstration with laser-based and magnetic gradients

Localization of electric fields achieved in a surface-electrode trap

Effective single-qubit rotations controlled by local electric fields

Abstract

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.