J. Dalibard heads an experimental research group at CNRS-ENS and Collège de France, Paris. Pioneering recent achievements include the first observation of a Kosterlitz-Thouless transition in 2D Bose gases and studies of vortex dynamics in rotating condensates. The group represents the forefront in the on-going effort to implement gauge fields towards fractional quantum Hall physics. Early in his career, J. Dalibard was responsible for key theoretical ideas in laser cooling and trapping, including polarization gradient cooling and the Magneto-optical Trap (MOT), and thus provides in the present team the link between theoretical and experimental quantum optics. He will be mainly in charge of the analysis of proposals for realizing topological states of matter and of their practical implementation on a cold atom setup.