Abstract
A modified nonlinear Schrodinger equation (MNLS) which is obtained by adding a third-order dispersion term to the nonlinear Schrodinger equation (NLS) is investigated numerically under the periodic boundary condition. It is found that the third-order dispersion term can give rise to chaotic behaviour. It is also found that when the coefficient of the third-order dispersion term becomes small the solutions of the MNLS equation come to have resemblance in the overall aspect to those of the NLS equation.
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