These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
2 files

Psi4 1.4: Open-Source Software for High-Throughput Quantum Chemistry

submitted on 04.03.2020, 17:32 and posted on 05.03.2020, 11:17 by Daniel Smith, Lori Burns, Andrew Simmonett, Robert Parrish, Matthew Schieber, Raimondas Galvelis, Peter Kraus, Holger Kruse, Roberto Di Remigio, Asem Alenaizan, Andrew James, Susi Lehtola, Jonathon Misiewicz, Maximilian Scheurer, Robert Shaw, Jeffrey Schriber, Yi Xie, Zachary Glick, Dominic Sirianni, Joseph O'Brien, Jonathan Waldrop, Ashutosh Kumar, Edward G. Hohenstein, Benjamin Pritchard, Bernard Brooks, Henry Schaefer, Alexander Sokolov, Konrad Patkowski, Eugene DePrince, Ugur Bozkaya, Rollin King, Francesco Evangelista, Justin Turney, Thomas Crawford, David Sherrill

Psi4 is a free and open-source ab initio electronic structure program providing Hartree–Fock, density functional theory, many-body perturbation theory, configuration interaction, density cumulant theory, symmetry-adapted perturbation theory, and coupled-cluster theory. Most of the methods are quite efficient thanks to density fitting and multi-core parallelism. The program is a hybrid of C++ and Python, and calculations may be run with very simple text files or using the Python API, facilitating post-processing and complex workflows; method developers also have access to most of Psi4’s core functionality via Python. Job specification may be passed using The Molecular Sciences Software Institute (MolSSI) QCSchema data format, facilitating interoperability. A rewrite of our top-level computation driver, and concomitant adoption of the MolSSI QCArchive Infrastructure project, make the latest version of Psi4 well suited to distributed computation of large numbers of independent tasks. The project has fostered the development of independent software components that may be reused in other quantum chemistry programs.


Email Address of Submitting Author


Georgia Institute of Technology



ORCID For Submitting Author


Declaration of Conflict of Interest

no conflict of interest


Read the published paper

in The Journal of Chemical Physics