Acta mathematica scientia,Series A ›› 2026, Vol. 46 ›› Issue (5): 1721-1741.

Previous Articles     Next Articles

Sign-Changing Solutions for Schrödinger Equations with Shrinking Self-Focusing Core

Junyuan Liu1(), Xinran Wei2,*()   

  1. 1 College of Informatics, Huazhong Agricultural University, Wuhan 430070
    2 Information Engineering University, Zhengzhou 450001
  • Received:2025-03-31 Revised:2026-01-19 Online:2026-10-26 Published:2026-09-07
  • Contact: Xinran Wei E-mail:jyliu@mail.hzau.edu.cn;weichenxi444@163.com
  • Supported by:
    Fundamental Research Funds for the Central Universities(2662025XXQD003);Independent Scientific Rescarch Project of Information Engineering University

Abstract:

We are interested in the sign-changing solutions for the equation $- \Delta u + u = {Q_n}(x){\left| u \right|^{p - 2}}u$ in $\mathbb{R}^N$, where $Q_n$ are concrete bounded functions with a self-focusing core ${{\rm supp}\{Q_n^+>0\}}$ that shrinks to a finite set of points as $n\rightarrow \infty$. We prove the existence of least energy sign-changing solutions that change sign only once for any $n>0$ if the self-focusing core shrinks to one or two points. Additionally, the least energy sign-changing solutions may also concentrate and converge to the solution of some limit equation. Furthermore, we utilize a penalty function distinct from that in Fang and Wang [Fang X D, Wang Z Q. Calc Var, 2020, 59(4): Art 129] to construct localized, bounded, sign-changing solutions of concentration type.

Key words: sign-changing solutions, Schrödinger equations, existence

CLC Number: 

  • O175.29
Trendmd