Shortcuts to Adiabaticity in Digitized Adiabatic Quantum Computing

TL;DR

This paper demonstrates how counter-diabatic driving can be applied to digitized adiabatic quantum computing to improve fidelity and reduce simulation time, successfully implemented on IBM quantum hardware.

Contribution

It introduces the use of counter-diabatic driving in digitized adiabatic quantum computing, showing its effectiveness in state preparation and speed-up on real quantum devices.

Findings

High-fidelity Bell and GHZ state preparation achieved

Significant reduction in simulation time demonstrated

Successful implementation on IBM quantum hardware

Abstract

Shortcuts to adiabaticity are well-known methods for controlling the quantum dynamics beyond the adiabatic criteria, where counter-diabatic (CD) driving provides a promising means to speed up quantum many-body systems. In this work, we show the applicability of CD driving to enhance the digitized adiabatic quantum computing paradigm in terms of fidelity and total simulation time. We study the state evolution of an Ising spin chain using the digitized version of the standard CD driving and its variants derived from the variational approach. We apply this technique in the preparation of Bell and Greenberger-Horne-Zeilinger states with high fidelity using a very shallow quantum circuit. We implement this proposal in the IBM quantum computer, proving its usefulness for the speed up of adiabatic quantum computing in noisy intermediate-scale quantum devices.