The QMC Chem code

One of our main activities is the development of the massively parallel QMC code QMC=Chem.

Current Features

Methods

• VMC
• DMC
• Jastrow factor optimization
• CI coefficients optimization

Wave functions

• Single determinant
• Multi-determinant
• Multi-Jastrow
• Nuclear cusp correction

Properties

• The Electron Pair Localization Function

Practical aspects

• Very low memory requirements
• Runs on a large number of processors : tested on 512 processors at the CALMIP cluster, and on 1000 processors on the EGEE European grid.
• Checkpointing
• Fail safe : if the code is aborted, the data is kept. This feature is very useful in grid environments.
• Easy development with the IRPF90 tool.

Features under development

Methods

• Wave function optimization

Properties

• Molecular Forces
• Moments (dipole, quadrupole,...)
• Electron density
• ZV-ZB EPLF estimator

Practical aspects

• Graphical interface for input and output