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Strong instability of standing waves for nonlinear schrodinger equations with harmonic potential

2017-12-08 16:51    
主题:
Strong instability of standing waves for nonlinear schrodinger equations with harmonic potential
时间:
2017-12-08 14:00-15:00
地点:
卫津路校区6号楼108教室
主讲人:
Masahito Ohta

主讲人简介

Tokyo University of Science 教授

演讲内容介绍

     We study strong instability of standing waves $e^{i\omega t} \phi_{\omega}(x)$ for nonlinear Schrödinger equations with $L^2$-supercritical nonlinearity and a harmonic potential, where $\phi_{\omega}$ is a ground state of the corresponding stationary problem. We prove that $e^{i\omega t} \phi_{\omega}(x)$ is strongly unstable if $\partial_{\lambda}^2 E(\phi_{\omega}^{\lambda}) |_{\lambda=1}\le 0$, where $E$ is the energy and $v^{\lambda}(x)=\lambda^{N/2} v(\lambda x)$ is the $L^2$-invariant scaling.

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