Fig. 2
From: Multireference diffusion Monte Carlo reaches 2D materials
Energy convergence of SHDMC iterative algorithm. Energy vs. square root of cumulative computational cost (single determinant initial trial wavefunction) fit to the decaying exponential \(E = \Delta E e^{\sqrt{N_{\textrm{samples}}}/r}+E_0\), with \(\Delta E=10~\textrm{mHa}\), \(r=5.26\times 10^4\), and \(E_0=-11.193~\textrm{Ha}\). The variance weighted coefficient of determination of the fit was \(R^{2}=0.936\).
