Existence and symmetry result for Fractional p-Laplacian in ${\mathbb{R}}^n$

In this article we are interested in the following fractional $p$-Laplacian equation in ${\mathbb{R}}^n$ \begin{eqnarray*} &(-\Delta)_{p}^{\alpha}u + V(x)u^{p-2}u = f(x,u) \mbox{ in } $\mathbb{R}$^{n}, \end{eqnarray*} where $p\geq 2$,$0< s < 1$,$n\geq 2$ and subcritical p-superlinear nonlinearity. By using mountain pass theorem with Cerami condition we prove the existence of nontrivial solution. Furthermore, we show that this solution is radially simmetry.