Figure 6From: Few-qubit quantum-classical simulation of strongly correlated lattice fermions Impurity Green function in the time domain. The retarded impurity Green function \(iG^{R}_{\mathrm{imp}}(\tau)\) obtained with (a) 6, (b) 12, (c) 18, and (d) 24 Trotter steps up to time \(\tau=6/t^{*}\) using the XY method (blue diamonds). Comparison is given to the exact Green function (red dashed line). We set \(U=4t^{*}\) and \(V=t^{*}\).Back to article page