Self-Healing Diffusion Monte Carlo applied to a simple fermionic model: A critical assessment of the method
Self-Healing Diffusion Monte Carlo (SHDMC) failed to find exact solutions for a simple one-dimensional fermionic model using its standard setup, as the fixed-node energy increased incorrectly. The study showed that modifying the nodal update criterion by restricting the integration interval around the node and using a localized basis set allows SHDMC to converge to accurate energies when applied correctly.