Programmable quantum simulations on a trapped-ions quantum simulator with a global drive

TL;DR

This paper demonstrates a method for programmable quantum simulations using a trapped-ion quantum simulator with a global drive, achieving high fidelity and longer evolution times by simplifying control requirements.

Contribution

The authors introduce a global driving technique for quantum simulations on trapped ions, reducing control complexity and enabling accurate, long-duration simulations of spin-Hamiltonians.

Findings

Successful simulation of a quantum Ising ring

Accurate reconstruction of Hamiltonian parameters

Enhanced simulation fidelity and duration

Abstract

Simulation of quantum systems is notoriously challenging for classical computers, while quantum hardware is naturally well-suited for this task. However, the imperfections of contemporary quantum systems poses a considerable challenge in carrying out accurate simulations over long evolution times. Here we experimentally demonstrate a method for quantum simulations on a small-scale trapped ions-based quantum simulator. Our method enables quantum simulations of programmable spin-Hamiltonians, using only simple global fields, driving all qubits homogeneously and simultaneously. We measure the evolution of a quantum Ising ring and accurately reconstruct the Hamiltonian parameters, showcasing an accurate and high-fidelity simulation. Our method enables a significant reduction in the required control and depth of quantum simulations, thus generating longer evolution times with higher accuracy.