This volume is based on a symposium in honor of Professor Ingvar Lindgren. It includes a contribution by Dr. William D. Phillips, who was awarded the 1997 Nobel Prize in the field of physics for work on the development of methods to cool and trap atoms with laser light. Advances in Quantum Chemistry publishes surveys of current developments in the rapidly developing field of quantum chemistry–a field that falls between the historically established areas of mathematics, physics, chemistry, and biology. With invited reviews written by leading international researchers, each presenting new results, this quality serial provides a single vehicle for following progress in this interdisciplinary area.