After reviewing the fundamental details of the inertial field and light carrier, we deduce the superluminal carrier using the Schrodinger time-dependent equation (STDE), introducing as coefficient of the wave-function the inertial potential provided by the general exponent ac. By solving the STDE we obtain the superluminal potential field, the group velocity, and the force of the electromagnetic field responsible for the wave propagation. A short discussion makes some reference to tachyons and theoretical and experimental evidence of superluminality. Conclusions touch on crucial reflections about the concept of causality and on the advance constituted by the stability of the electromagnetic signal, determined by the inertial field on both ordinary and superluminal light velocity. In the conclusion we also deduce the linear momentum theorem for a spaceship planned to travel at superluminal velocity. From this idea we try to dissolve the apparent paradox between the existence, and its barriers, of theoretical and experimental evidence linked to velocities greater than c.
