Psi
An open-source suite of ab initio quantum chemistry programs for high-accuracy molecular simulations, written in C++ with a Python driver.
What is Psi?
Psi4 is an open-source suite of ab initio quantum chemistry programs designed for efficient, high-accuracy simulations of molecular properties. It solves complex electronic structure problems, enabling researchers to perform computations with over 2500 basis functions on multi-core machines.
Computational chemists, quantum chemistry researchers, and scientists needing high-accuracy molecular simulations for academic or industrial research.
Developers choose Psi4 for its combination of high-performance C++ core and flexible Python driver, offering both computational efficiency and user-friendly scripting for advanced quantum chemistry calculations.
Overview
Open-Source Quantum Chemistry – an electronic structure package in C++ driven by Python
Use Cases
Best For
- Performing high-accuracy ab initio quantum chemistry calculations
- Simulating molecular properties with large basis sets (>2500 functions)
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