# Multilayer ion trap with three-dimensional microwave circuitry for scalable quantum logic applications

## TL;DR

This paper introduces a multilayer ion trap with integrated 3D microwave circuitry, significantly reducing AC Zeeman shifts and advancing scalable quantum logic gate implementation.

## Contribution

It presents a novel multilayer surface-electrode ion trap design with embedded 3D microwave circuitry, improving field control for quantum logic operations.

## Key findings

- Microwave field-pattern characterized with a single ion probe
- AC Zeeman shifts reduced by three orders of magnitude
- Design suitable as a component for scalable quantum gates

## Abstract

We present a multilayer surface-electrode ion trap with embedded 3D microwave circuitry for implementing entangling quantum logic gates. We discuss the electromagnetic full-wave simulation procedure that has led to the trap design and the characterization of the resulting microwave field-pattern using a single ion as a local field probe. The results agree with simulations within the uncertainty; compared to previous traps, this design reduces detrimental AC Zeeman shifts by three orders of magnitude. The design presented here can be viewed as an entangling gate component in a library for surface-electrode ion traps intended for quantum logic operations.