Localizing estimates of the support of solutions of some nonlinear Schrödinger equations – The stationary case

  • Pascal Bégout

    Institut de Mathématiques de Toulouse, Université de Toulouse, Manufacture des Tabacs, 21 Allée de Brienne, 31000 Toulouse Cedex, France
  • Jesús Ildefonso Díaz

    Departamento de Matemática Aplicada, Facultad de Ciencias Matemáticas, Universidad Complutense de Madrid, Plaza de Ciencias 3, 28040 Madrid, Spain

Abstract

The main goal of this paper is to study the nature of the support of the solution of suitable nonlinear Schrödinger equations, mainly the compactness of the support and its spatial localization. This question touches the very foundations underlying the derivation of the Schrödinger equation, since it is well-known a solution of a linear Schrödinger equation perturbed by a regular potential never vanishes on a set of positive measure. A fact, which reflects the impossibility of locating the particle. Here we shall prove that if the perturbation involves suitable singular nonlinear terms then the support of the solution is a compact set, and so any estimate on its spatial localization implies very rich information on places not accessible by the particle. Our results are obtained by the application of certain energy methods which connect the compactness of the support with the local vanishing of a suitable “energy function” which satisfies a nonlinear differential inequality with an exponent less than one. The results improve and extend a previous short presentation by the authors published in 2006.

Cite this article

Pascal Bégout, Jesús Ildefonso Díaz, Localizing estimates of the support of solutions of some nonlinear Schrödinger equations – The stationary case. Ann. Inst. H. Poincaré Anal. Non Linéaire 29 (2012), no. 1, pp. 35–58

DOI 10.1016/J.ANIHPC.2011.09.001