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The HANDE-QMC project: open-source stochastic quantum chemistry from the ground state up
Journal article   Peer reviewed

The HANDE-QMC project: open-source stochastic quantum chemistry from the ground state up

James S Spencer, Nick S Blunt, Seonghoon Choi, Jiří Etrych, Maria-Andreea Filip, W M C Foulkes, R S T Franklin, Will J Handley, Fionn D Malone, Verena A Neufeld, …
Journal of chemical theory and computation : JCTC., Vol.15(3), pp.1728-1742
01/25/2019
DOI: 10.1021/acs.jctc.8b01217
url
https://arxiv.org/pdf/1811.11679View
Open Access

Abstract

Building on the success of Quantum Monte Carlo techniques such as diffusion Monte Carlo, alternative stochastic approaches to solve electronic structure problems have emerged over the past decade. The full configuration interaction quantum Monte Carlo (FCIQMC) method allows one to systematically approach the exact solution of such problems, for cases where very high accuracy is desired. The introduction of FCIQMC has subsequently led to the development of coupled cluster Monte Carlo (CCMC) and density matrix quantum Monte Carlo (DMQMC), allowing stochastic sampling of the coupled cluster wave function and the exact thermal density matrix, respectively. In this Article, we describe the HANDE-QMC code, an open-source implementation of FCIQMC, CCMC and DMQMC, including initiator and semistochastic adaptations. We describe our code and demonstrate its use on three example systems; a molecule (nitric oxide), a model solid (the uniform electron gas), and a real solid (diamond). An illustrative tutorial is also included.
Chemical Physics Physical Sciences Physics CONFIGURATION-INTERACTION 0803 Computer Software ALGORITHM 0601 Biochemistry and Cell Biology Chemistry, Physical physics.comp-ph Science & Technology Chemistry WAVE-FUNCTIONS ELECTRON CORRELATIONS GAS FERROMAGNETISM Physics, Atomic, Molecular & Chemical LOCAL TREATMENT ENERGIES 0307 Theoretical and Computational Chemistry

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