NUMERICAL METHODS FOR A COUPLED NONLINEAR SCHRÖDINGER SYSTEM

M. SEPULVEDA AND O. VERA† Departamento de Ingenieria Matematica, Universidad de Concepcion, Chile. †Departamento de Matematica, Universidad del Bio-Bio, Chile. We study a numerical method based on a Crank-Nicolson scheme for a coupled nonlinear Schrodinger system that describes some physical phenomena such as the propagation in birefringent optical fibers, Kerrlike photo refractive media in optics and Bose-Einstein condensates. This numerical scheme preserves the densities and the energy of the solution, and it is proved the convergence of its sequence of solutions. Key words: Schrodinger equations, asymptotically free solution, Crank- Nicolson scheme. AMS subject classifications: 35Q55, 35B40, 65N06