On the Semi-classical Limit for the Nonlinear Schrödinger Equation

Existence and Semi–Classical Limit of the Least Energy Solution to a Nonlinear Schrödinger Equation with Electromagnetic Fields

Semiclassical Limit of the Nonlinear Schrödinger-Poisson Equation with Subcritical Initial Data

We study the semi-classical limit of the nonlinear Schrödinger-Poisson (NLSP) equation for initial data of the WKB type. The semi-classical limit in this case is realized in terms of a density-velocity pair governed by the Euler-Poisson equations. Recently we have shown in [ELT, Indiana Univ. Math. J., 50 (2001), 109–157], that the isotropic Euler-Poisson equations admit a critical threshold ph...

A numerical study of the semi-classical limit of the focusing nonlinear Schrödinger equation

We study the solution of the focusing nonlinear Schrödinger equation in the semiclassical limit. Numerical solutions are presented for four different kinds of initial data, of which three are analytic and one is nonanalytic. We verify numerically the weak convergence of the oscillatory solution by examining the strong convergence of the spatial average of the solution.  2002 Elsevier Science B...

A Semi-implicit Moving Mesh Method for the Focusing Nonlinear Schrödinger Equation

An efficient adaptive moving mesh method for investigation of the semi-classical limit of the focusing nonlinear Schrödinger equation is presented. The method employs a dynamic mesh to resolve the sea of solitons observed for small dispersion parameters. A second order semi-implicit discretization is used in conjunction with a dynamic mesh generator to achieve a cost-efficient, accurate, and st...

Nonlinear Coherent States and Ehrenfest Time for Schrödinger Equation

We consider the propagation of wave packets for the nonlinear Schrödinger equation, in the semi-classical limit. We establish the existence of a critical size for the initial data, in terms of the Planck constant: if the initial data are too small, the nonlinearity is negligible up to the Ehrenfest time. If the initial data have the critical size, then at leading order the wave function propaga...