Journal of Inequalities and Applications (Jan 2020)
Existence of positive ground state solutions to a nonlinear fractional Schrödinger system with linear couplings
Abstract
Abstract In this paper, we investigate a nonlinear fractional Schrödinger system with linear couplings as follows: {(−Δ)αu+(1+a(x))u=Fu(u,v)+λv,in R3,(−Δ)αv+(1+b(x))v=Fv(u,v)+λu,in R3,u,v∈Hα(R3), $$ \textstyle\begin{cases} (-\Delta )^{\alpha }u+(1+a(x))u=F_{u}(u,v)+\lambda v,& \text{in } \mathbb{R}^{3}, \\ (-\Delta )^{\alpha }v+(1+b(x))v=F_{v}(u,v)+\lambda u,& \text{in } \mathbb{R}^{3}, \\ u,v\in H^{\alpha }(\mathbb{R}^{3}), \end{cases} $$ where (−Δ)α,α∈(0,1) $(-\Delta )^{\alpha }, \alpha \in (0,1)$, denotes the fractional Laplacian and λ>0 $\lambda >0$ is the coupling parameter. Under some assumptions, we prove the existence of positive ground state solutions to the above system with the help of the method of Nehari manifold and concentration compactness lemma.
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