Simulating $\mathbb{Z}_2$ lattice gauge theory on a quantum computer
Abstract
The utility of quantum computers for simulating lattice gauge theories is currently limited by the noisiness of the physical hardware. Various quantum error mitigation strategies exist to reduce the statistical and systematic uncertainties in quantum simulations via improved algorithms and analysis strategies. We perform quantum simulations of gauge theory with matter to study the efficacy and interplay of different error mitigation methods: readout error mitigation, randomized compiling, rescaling, and dynamical decoupling. We compute Minkowski correlation functions in this confining gauge theory and extract the mass of the lightest spin-1 state from fits to their time dependence. Quantum error mitigation extends the range of times over which our correlation function calculations are accurate by a factor of six and is therefore essential for obtaining reliable masses.
Cite
@article{arxiv.2305.02361,
title = {Simulating $\mathbb{Z}_2$ lattice gauge theory on a quantum computer},
author = {Clement Charles and Erik J. Gustafson and Elizabeth Hardt and Florian Herren and Norman Hogan and Henry Lamm and Sara Starecheski and Ruth S. Van de Water and Michael L. Wagman},
journal= {arXiv preprint arXiv:2305.02361},
year = {2023}
}
Comments
20 Pages, 18 Figures