On a class of mixed Choquard-Schrödinger-Poisson systems

  title={On a class of mixed Choquard-Schr{\"o}dinger-Poisson systems},
  author={Marius Ghergu and Gurpreet Singh},
  journal={Discrete \& Continuous Dynamical Systems - S},
We study the system $$ \left\{ -\Delta u+u+K(x) \phi |u|^{q-2}u&=(I_\alpha*|u|^p)|u|^{p-2}u &&\mbox{ in }{\mathbb R}^N, -\Delta \phi&=K(x)|u|^q&&\mbox{ in }{\mathbb R}^N, \right. $$ where $N\geq 3$, $\alpha\in (0,N)$, $p,q>1$ and $K\geq 0$. Using a Pohozaev type identity we first derive conditions in terms of $p,q,N,\alpha$ and $K$ for which no solutions exist. Next, we discuss the existence of a ground state solution by using a variational approach. 
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