CNQO is one of the largest research groups in the department. The group applies theoretical and computational approaches to investigate problems associated with the fundamental nature of light-matter interactions as well as the capabilities of nonlinear optical devices based on or using laser light. It has state-of-the-art computational facilities and is a pioneer in the use of visual simulation to study nonlinear optical phenomena. It has its own network of UNIX workstations and connections to top-of-the-range computational facilities for parallel calculation and virtual reality graphics funded under collaborative multi-disciplinary projects. There are extensive research collaborations with groups in the EU via substantial European research grants, Australia, Japan, Russia, and the USA.