Figure 4
From: Hybrid classical-quantum linear solver using Noisy Intermediate-Scale Quantum machines
Relative errors \(\varepsilon =|{x}_{I}^{exact}-{x}_{I}|/|{x}_{I}^{exact}|\) as a function of the sampling number ns for \(N=64\) and \(N=128\) matrices, obtained by performing two quantum walk evolutions, \({{\mathscr{U}}}^{2}\). Black solid lines represent the \(1/\sqrt{{n}_{s}}\) error reduction expected for Monte Carlo calculations. Red dashed line and blue dotted line are the results computed by the QASM simulator.
