Simone Secchi, Marco Squassina Soliton dynamics for fractional Schr\"odinger equations (1160K, LaTeX 2e with 3 PS Figures) ABSTRACT. We investigate the soliton dynamics for the fractional nonlinear Schr\"odinger equation by a suitable modulational inequality. In the semiclassical limit, the solution concentrates along a trajectory determined by a Newtonian equation depending of the fractional diffusion parameter.