Surface trap with adjustable ion couplings for scalable and parallel gates

TL;DR

This paper presents a surface-electrode Paul trap design enabling adjustable ion couplings for scalable, parallel entangling gates, demonstrating control over ion motion and gate performance in multi-ion systems.

Contribution

It introduces a novel trap configuration allowing dynamic control of ion couplings for parallel quantum gates, advancing scalable quantum computing architectures.

Findings

Successful demonstration of adjustable ion coupling via DC-voltage control

Parallel MS-gate operations verified with specific voltage configurations

Scalability confirmed despite phonon mode occupation and drift effects

Abstract

We describe the design and operation of a surface-electrode Paul trap for parallel entangling gate implementation. In particular, we demonstrate the possibility of separating or coupling ion motion by adjusting the DC-voltages on a set of electrodes and show the possibility of parallel MS-gate operations for specific voltage configurations. We verify the scalability of this approach and characterize the performance of these gates in the presence of the finite phonon mode occupation and of the finite drift of the phonon frequencies. Additionally, we investigate how the number of ions per individual trapping site and anharmonic potential terms affect the coupling between the wells.