Molecular Quantum Monte Carlo Calculations Using Nexus - Session 4.2 of 7

Learn to perform Quantum Monte Carlo calculations for molecular systems through hands-on tutorials using QMCPACK, PySCF, and Nexus in this 50-minute instructional session. Master the complete QMC workflow starting with beryllium dimer calculations, including running PySCF for initial electronic structure calculations and using Nexus to automate the computational pipeline. Explore density functional theory results and understand how to construct QMC wave functions with proper orbital calculations and Jastrow function optimization. Dive into Diffusion Monte Carlo techniques while examining critical aspects like timestep dependence, error bar reduction, and population bias effects. Apply these concepts to oxygen dimer calculations and extend the methodology to water molecule systems. Gain practical experience with workflow automation and learn essential considerations for accurate molecular QMC simulations. Access comprehensive presentation materials and example files through the provided GitHub repository to reinforce the tutorial concepts and practice the computational techniques independently.