Hamiltonian elliptic systems with nonlinearities of arbitrary growth

J. Anderson Cardoso, Joao Marcos do Ó, Everaldo Souto de Medeiros

DOI: http://dx.doi.org/10.12775/TMNA.2016.018

Abstract


We study the existence of standing wave solutions for the following class of elliptic Hamiltonian-type systems: \[ \begin{cases} -\hs^2\Delta u+ V(x)u = g(v) & \mbox{in } \mathbb{R}^N, \\ -\hs^2\Delta v+ V(x)v = f(u) & \mbox{in } \mathbb{R}^N, \end{cases} \] with $N\geq2$, where $\hbar$ is a positive parameter and the nonlinearities $f,g$ are superlinear and can have arbitrary growth at infinity. This system is in variational form and the associated energy functional is strongly indefinite. Moreover, in view of unboundedness of the domain $\mathbb{R}^N$ and the arbitrary growth of nonlinearities we have lack of compactness. We use a dual variational approach in combination with a mountain-pass type procedure to prove the existence of positive solution for $\hbar$ sufficiently small.

Keywords


Nonlinear Schrӧdinger equations; standing waves; variational methods; elliptic systems; nonlinearities of arbitrary growth

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