Long-time dynamics of small solutions to the Manakov system with initial data in the weighted $L^2$ space

In this paper, we compute the long-time asymptotics for small solutions of the Manakov system which is a coupled system of nonlinear Schr"odinger equations just under the assumption that the initial data lies in the weighted $L^2$ space. This will be our first step to understand the long-time asymptotics of higher order AKNS systems in low regularity spaces and analyze the interaction of modified scatterings. In the last section, we also discuss on the interaction of the linear and the modified scattering. Our techniques are relied on the idea of the space-time resonance.