On the nonlinear Schrödinger-Poisson systems with positron-electron interaction (2306.17343v1)

Abstract: We study the Schr\"{o}dinger-Poisson type system: \begin{equation*} \left{ \begin{array}{ll} -\Delta u+\lambda u+\left( \mu {11}\phi _{u}-\mu _{12}\phi _{v}\right) u=% \frac{1}{2\pi }\int{0}^{2\pi }\left\vert u+e^{i\theta }v\right\vert ^{p-1}\left( u+e^{i\theta }v\right) d\theta & \text{ in }\mathbb{R}^{3}, \ -\Delta v+\lambda v+\left( \mu {22}\phi _{v}-\mu _{12}\phi _{u}\right) v=% \frac{1}{2\pi }\int{0}^{2\pi }\left\vert v+e^{i\theta }u\right\vert ^{p-1}\left( v+e^{i\theta }u\right) d\theta & \text{ in }\mathbb{R}^{3},% \end{array}% \right. \end{equation*}% where $1<p\<3$ with parameters $\lambda ,\mu_{ij}\>0$. Novel approaches are employed to prove the existence of a positive solution for $1<p<3$ including, particularly, the finding of a ground state solution for $2\leq p<3$ using established linear algebra techniques and demonstrating the existence of two distinct positive solutions for $1<p<2.$ The analysis here, by employing alternative techniques, yields additional and improved results to those obtained in the study of Jin and Seok [Calc. Var. (2023) 62:72].