A two level sampling method is applied to variational Monte Carlo (VMC) that samples the one and two body parts of the wave function separately. The method is demonstrated on a single Li_2 molecule in free space and 32 H_2 molecules in a periodic box. This simple modification increases the efficiency of a VMC simulation by up to 72%.
@article{arxiv.physics/0007015,
title = {Improved efficiency with variational Monte Carlo using two level sampling},
author = {Mark Dewing},
journal= {arXiv preprint arXiv:physics/0007015},
year = {2016}
}