Pseudopotential for the electron-electron interaction
Strongly Correlated Electrons
2015-09-02 v1 Chemical Physics
Abstract
We propose a pseudopotential for the electron-electron Coulomb interaction to improve the efficiency of many-body electronic structure calculations. The pseudopotential accurately replicates the scattering properties of the Coulomb interaction, and recovers the analytical solution for two electrons in a parabolic trap. A case study for the homogeneous electron gas using the diffusion Monte Carlo and configuration interaction methods recovers highly accurate values for the ground state energy, and the smoother potential reduces the computational cost by a factor of ~30. Finally, we demonstrate the use of the pseudopotential to study isolated lithium and beryllium atoms.
Cite
@article{arxiv.1508.02004,
title = {Pseudopotential for the electron-electron interaction},
author = {J. H. Lloyd-Williams and R. J. Needs and G. J. Conduit},
journal= {arXiv preprint arXiv:1508.02004},
year = {2015}
}