Nonlinear Schrodinger-Helmholtz Equation as Numerical Regularization of the Nonlinear Schrodinger Equation

Abstract

A regularized $\alpha-$system of the Nonlinear Schr\"{o}dinger Equation (NLS) with $2\sigma$ nonlinear power in dimension $N$ is studied. We prove existence and uniqueness of local solution in the case $1 \le \sigma <\frac{4}{N-2}$ and existence and uniqueness of global solution in the case $1 \le \sigma < \frac{4}{N}$. When $\alpha \to 0^+$, this regularized system will converge to the classical NLS in the appropriate range. In particular, the purpose of this numerical regularization is to shed light on the profile of the blow up solutions of the original Nonlinear Schr\"{o}dinger Equation in the range $\frac{2}{N}\le \sigma <\frac{4}{N}$, and in particular for the critical case $\sigma = \frac{2}{N}$.