Multiple nodal solutions for the Schr\”odinger-Poisson system with an asymptotically cubic term
• Hui Guo,
• Ronghua Tang,
• Tao Wang
Hui Guo
Hunan University of Science and Technology
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Ronghua Tang
Hunan University of Science and Technology
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Tao Wang
Hunan University of Science and Technology
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## Abstract

This paper deals with the following Schr\“odinger-Poisson system \label{zhaiyaofc}\left\{\begin{aligned} &-\Delta u+u+ \lambda\phi u=f(u)\quad\mbox{in }\mathbb{R}^3,\\ &-\Delta \phi=u^{2}\quad\mbox{in }\mathbb{R}^3, \end{aligned}\right. where $\lambda>0$ and $f(u)$ is a nonlinear term asymptotically cubic at the infinity. Taking advantage of the Miranda theorem and deformation lemma, we combine some new analytic techniques to prove that for each positive integer $k,$ system \eqref{zhaiyaofc} admits a radial nodal solution $U_k^{\lambda}$, which has exactly $k+1$ nodal domains and the corresponding energy is strictly increasing in $k$. Moreover, for any sequence $\{\lambda_n\}\to 0_+$ as $n\to\infty,$ up to a subsequence, $U_k^{\lambda_n}$ converges to some $U_k^0\in H_r^1(\mathbb{R}^3)$, which is a radial nodal solution with exactly $k+1$ nodal domains of \eqref{zhaiyaofc} for $\lambda=0$. These results give an affirmative answer to the open problem proposed in [Kim S, Seok J. Commun. Contemp. Math., 2012] for the Schr\”odinger-Poisson system with an asymptotically cubic term.

#### Peer review status:UNDER REVIEW

07 Jul 2021Submitted to Mathematical Methods in the Applied Sciences
07 Jul 2021Assigned to Editor
07 Jul 2021Submission Checks Completed
10 Jul 2021Reviewer(s) Assigned