CCPQ is a collaborative computational project with the objectives of developing theoretical techniques and computer programs to describe collisions between projectiles such as electrons, positrons or photons and atomic or molecular targets.  Over the years these objectives have expanded to include atoms and molecules in strong (long-pulse and attosecond) laser fields,  low-energy interactions of antihydrogen with small atoms and molecules,  cold atoms,  Bose-Einstein  condensates  and  optical  lattices.  The  project  grew  out  of  the  old  CCP2  which  focused  on  correlated  ab  initio  continuum methods for leptonic collisions and multiphoton interactions, and in 2011 incorporated CCP6 that focused on molecule-molecule scattering and nuclear quantum dynamics.  It involves research scientists from UK universities and government laboratories as well as scientists from Germany, Italy, Japan and US. CCPQ supports network activities, code curation using CCPForge until its closure and now on GitLab, zenodo and GitHub, and related atomic and molecular research.

The project is directed by a Steering Panel chaired by Dr Jimena D Gorfinkiel, with vice-chairs Dr Stephen Clark, University of Bristol, and Professor Hugo van der Hart, Queen's University Belfast. We thank and give our best wishes to former Chair Professor Graham Worth, University College London. The CCPQ Steering Panel with additional UK members and international members and advisers make up the network Working Group. If you work in the CCPQ areas of interest and would like to be involved in the Working Group, please contact Dr Gorfinkiel. The project receives support (acknowledged below) from the Computational Science Centre for Research Communities, CoSeC. Many members of CCPQ are part of EPSRC's High End Consortium (HEC) UK-AMOR for high performance computing on the UK national resource ARCHER (and its successor ARCHER-2).