Solvability of a mixed problem for the nonlinear Schrödinger equation. (English. Russian original) Zbl 0658.35017

Math. USSR, Sb. 58, 525-540 (1987); translation from Mat. Sb., Nov. Ser. 130(172), No. 4, 520-536 (1986).
The existence and uniqueness of the solution of a mixed problem for the nonlinear Schrödinger equation of the form \[ \partial u/\partial t+i\Delta u+i\alpha | u|^ pu+\beta | u|^ qu=0,\quad (x,t)\in Q=G\times [0,T], \] at the boundary condition \(u|_{t=0}=u_ 0(x)\) is studied. In this equation G is a finite region of an n-dimensional space \(R^ n\), \(\alpha\) is a real number in the spaces \(L_{\infty}(0,T;\overset\circ W^ 1_ 2(G)\) and \(L_{\infty}(0,T;\overset\circ W^ 1_ 2(G)\cap W^ 2_ 2(G)\) at \(q\geq p\geq 0\), \(\beta >0\). The essential results were already published by the author [Sov. Math. Dokl. 29, 281-284 (1984); translation from Dokl. Akad. Nauk SSSR 275, 780-783 (1984; Zbl 0585.35019)]. The existence of the generalized solution was proved by the Galerkin method under additional conditions imposed on n, p, q, \(\alpha\) and \(\beta\). The asymptotics of the solution are given. The uniqueness of the solution is also proved. Such an equation describes e.g. light beam propagation in nonlinear media
Reviewer: V.Burjan


35G30 Boundary value problems for nonlinear higher-order PDEs
35J10 Schrödinger operator, Schrödinger equation
78A10 Physical optics
35A35 Theoretical approximation in context of PDEs
35A05 General existence and uniqueness theorems (PDE) (MSC2000)


Zbl 0585.35019
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