Amplitude-noise-resilient entangling gates for trapped ions

TL;DR

This paper introduces control schemes that enhance amplitude noise resilience in entangling gates for trapped ions, leveraging weak anharmonicities to meet experimental standards and improve quantum information processing robustness.

Contribution

It demonstrates that weak anharmonicities enable amplitude noise-resilient entangling gates, compatible with current trap technologies and applicable to various bosonic bus platforms.

Findings

Control schemes achieve amplitude noise resilience.

Anharmonicities can be realized with existing trap technology.

Applicable broadly to platforms using bosonic buses.

Abstract

Noise resilience of quantum information processing is a crucial precondition to reach the fault-tolerance threshold. While resilience to many types of noise can be achieved through suitable control schemes, resilience to amplitude noise seems to be elusive within the common harmonic approximation for the bus mode of trapped ions. We show that weak an-harmonicities admit control schemes that achieve amplitude noise-resilience consistent with state-of-the-art experimental requirements, and that the required an-harmonicities can be achieved with current standards of micro-structured traps or even the intrinsically an-harmonic Coulomb interaction. This approach applies broadly to any platform that employs a bosonic bus as a qubit coupler.