Figure 3

(Left): Ground-state expectation values for \(D_{3}\) for the full Kogut-Susskind Hamiltonian (red), electric term (black), and magnetic term (blue) as a function of the inverse Hamiltonian coupling squared. The open symbols represent the minimum result from the quantum annealer while the filled symbols were obtained from classical simulated annealing. The colored band, although barely visible, represents the mean and sample standard deviation of the measurements from the quantum annealer. Simulation parameters for the latter were \(K=3\) with \(z_{max} = 5\) zoom steps and \(n_{\mathrm{reads}} = 1000\). (Right): The same quantities for \(G = D_{4}\) where the sample standard deviation from QA is much larger. This is due to the fact that more computing resources are needed to accurately determine the minimum. Simulation parameters for QA were \(K=2\) with \(z_{max} = 7\) zoom steps and \(n_{\mathrm{reads}} = 2000\)