Rotated ansatz for approximate counterdiabatic driving

TL;DR

This paper introduces a variational rotated ansatz (RA) to create experimentally feasible approximate counterdiabatic protocols, significantly improving quantum state manipulation and adiabatic quantum computing performance.

Contribution

The novel rotated ansatz systematically generates accessible approximate CD protocols, addressing implementation challenges of non-local multi-body interactions.

Findings

RA protocols significantly enhance state preparation.

RA improves performance of adiabatic quantum algorithms.

Benchmark results show increased efficiency with RA.

Abstract

Approximate counterdiabatic (CD) protocols are a powerful tool to enhance quantum adiabatic processes that allow to reliably manipulate quantum systems on short time scales. However, implementing CD protocols entails the introduction of additional control fields in the Hamiltonian, often associated with highly non-local multi-body interactions. Here, we introduce a novel variational rotated ansatz (RA) to systematically generate experimentally accessible approximate CD protocols. We numerically benchmark our approach on state preparation and adiabatic quantum computing algorithms, and find that using RA protocols significantly enhances their performances.