Stability propertiesproperties of standing waves for NLS equations with the delta'-interaction
We study the orbital stability of standing waves with discontinuous bump-like profile for the nonlinear Schrodinger model with the repulsive delta'-interaction on the line. We consider the model with power non-linearity. In particular, it is shown that such standing waves are unstable in the en...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/195227 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.physd.2020.132332 http://hdl.handle.net/11449/195227 |
| Access Level: | acceso abierto |
| Palabra clave: | Nonlinear Schrodinger equation Orbital stability Bump solutions Self-adjoint extension Deficiency indices Sturm-Liouville theory |
| Sumario: | We study the orbital stability of standing waves with discontinuous bump-like profile for the nonlinear Schrodinger model with the repulsive delta'-interaction on the line. We consider the model with power non-linearity. In particular, it is shown that such standing waves are unstable in the energy space under some restrictions for parameters. The use of extension theory of symmetric operators by Krein-von Neumann is fundamental for estimating the Morse index of self-adjoint operators associated with our stability study. Moreover, for this purpose we use Sturm oscillation results and analytic perturbation theory. The Perron-Frobenius property for the repulsive delta'-interaction is established. The arguments presented in this investigation have prospects for the study of the stability of stationary waves solutions of other nonlinear evolution equations with point interactions. (C) 2020 Elsevier B.V. All rights reserved. |
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