Quantum sampling for the Euclidean path integral of lattice gauge theory

Abstract

Although the Hamiltonian formalism is, so far, favored for quantum computation of lattice gauge theory, the path integral formalism would never be useless. The advantages of the path integral formalism are the knowledge and experience accumulated by classical lattice simulation and manifest Lorentz invariance. In this article, we will discuss quantum computation of lattice gauge theory in the path integral formalism, utilize a quantum sampling algorithm to generate gauge configurations, and demonstrate a benchmark test of ${Z}_{2}$ lattice gauge theory on a four-dimensional hypercube.