Quantum Monte Carlo calculations for minimum energy structures

Lucas K. Wagner, Jeffrey C. Grossman

Research output: Contribution to journalArticlepeer-review

Abstract

We present an efficient method to find minimum energy structures using energy estimates from accurate quantum Monte Carlo calculations. This method involves a stochastic process formed from the stochastic energy estimates from Monte Carlo calculations that can be averaged to find precise structural minima while using inexpensive calculations with moderate statistical uncertainty. We demonstrate the applicability of the algorithm by minimizing the energy of the H2O-OH- complex and showing that the structural minima from quantum Monte Carlo calculations affect the qualitative behavior of the potential energy surface substantially.

Original languageEnglish (US)
Article number210201
JournalPhysical review letters
Volume104
Issue number21
DOIs
StatePublished - May 26 2010
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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