Nonlinear instability of linearly unstable standing waves for nonlinear Schrödinger equations
arXiv:1009.5184
Abstract
We study the instability of standing waves for nonlinear Schrödinger equations. Under a general assumption on nonlinearity, we prove that linear instability implies orbital instability in any dimension. For that purpose, we establish a Strichartz type estimate for the propagator generated by the linearized operator around standing wave.
16 pages