Collaborative Computational Project Q (CCPQ) was developed in order to provide software which uses theoretical techniques to catalogue collisions between electrons, positrons or photons and atomic/molecular targets.
[1] CCPQ gives essential information on the reactivity of various molecules, and contains two community codes R-matrix suite and MCTDH wavepacket dynamics.
CCPQ (and its predecessor CCP2) have supported various incarnations of the UK Molecular R-matrix project for almost 40 years.
[2] CCPQ has been used to study the Hubbard models for cold atoms in optical lattices, as it provides codes used in this area of research.
[4] CCPQ hosted the necessary code on the CCPForge website, which contains other computational research projects.