A diffusion Monte Carlo algorithm with very small timestep errors

@inproceedings{Umrigar1999ADM,
  title={A diffusion Monte Carlo algorithm with very small timestep errors},
  author={C. J. Umrigar},
  year={1999}
}
We propose modifications to the simple diffusion Monte Carlo algorithm that greatly reduce the time-step error. The improved algorithm has a time-step error smaller by a factor of 70 to 300 in the energy of Be, Liz and Ne. For other observables the improvement is yet larger. The effective time step possible with the improved algorithm is typically a factor of a few hundred larger than the time step used in domain Green function Monte Carlo. We also present an optimized 109 parameter trial wave… CONTINUE READING