2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80858We present a new experimental system (the ``atom-optics billiard'') and demonstrate chaotic and regular dynamics of cold, optically trapped atoms. We show that the softness of the walls and additional optical potentials can be used to manipulate the structure of phase space.Lecture notes from the NATO ASI International Summer School on Chaotic Dynamics and Transport in Classical and Quantum Systems, Cargese, Corsica, August 2003Chaotic DynamicsOther Condensed MatterAtomic Physicstext