### On interacting bumps of semi-classical states of nonlinear Schrödinger equations

#### Abstract

We study concentrated positive bound states of the following nonlinear Schr\"odinger equation: $h^2 \Delta u - V(x) u + u^p=0,\ \ \ u>0, \ \ x \in R^N ,$ where $p$ is subcritical. We prove that, at a local maximum point $x_0$ of the potential function $V(x)$ and for arbitrary positive integer $K (K>1)$, there always exist solutions with $K$ interacting bumps concentrating near $x_0$. We also prove that at a nondegenerate local minimum point of $V(x)$ such solutions do not exist.

#### Article information

Source
Adv. Differential Equations, Volume 5, Number 7-9 (2000), 899-928.

Dates
First available in Project Euclid: 27 December 2012