Concentration phenomenon for fractional nonlinear Schrödinger equations

Abstract: We study the concentration phenomenon for solutions of the fractional nonlinear Schr\"{o}dinger equation, which is nonlocal. We mainly use the Lyapunov-Schmidt reduction method. Precisely, consider the nonlinear equation \begin{equation}\label{e:abstract} (-\varepsilon^2\Delta)^sv+Vv-|v|^{\alpha}v=0\quad\mbox{in}\quad\mathbf R^n, \end{equation} where $n =1, 2, 3$, $\max{\frac{1}{2}, \frac{n}{4}}< s < 1$, $1 \leq \alpha < \alpha_(s,n)$, $V\in C^3_{b}(\mathbf{R}^n)$. Here the exponent $\alpha_(s,n)=\frac{4s}{n-2s}$ for $0 < s < \frac{n}{2}$ and $\alpha_*(s,n)=\infty$ for $s \geq\frac{n}{2}$. Then for each non-degenerate critical point $z_0$ of $V$, there is a nontrivial solution of equation (\ref{e:abstract}) concentrating to $z_0$ as $\varepsilon\to 0$.