Wolfgang P. Schleich, born in 1957, is head of the Institute of Quantum Physics at the University of Ulm, Germany, and Adjunct Professor at the University of North Texas in Denton, USA. While working at the Universities of New Mexico, Albuquerque, of Texas at Austin and the Max Planck Institute for Quantum Physics, Garching, Germany, he has collaborated with world leaders in physics such as M.O. Scully, J.A. Wheeler and H. Walther. Professor Schleich has published more than 230 papers on problems of quantum optics, foundations of quantum mechanics and general relativity and is the author of th...