<p>In this paper, we will study ground state sign-changing solutions for asymptotically cubic or super-cubic Schrödinger-Bopp-Podolsky systems in two situations. Firstly, we consider the following system: <Equation ID="Equ107"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1291_Article_Equ107.gif" Format="GIF" Height="43" Rendition="HTML" Resolution="72" Type="Linedraw" Width="293" /> </MediaObject> <EquationSource Format="TEX">\(\begin{aligned}{\left\{ \begin{array}{ll}-\Delta u+V(x)u+\phi u=f(x,u), &amp; x\in \mathbb {R}^3\\ -\Delta \phi +a^2\Delta ^2\phi =4\pi u^2, &amp; x\in \mathbb {R}^3\end{array}\right. }\end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>u</mi> <mo>+</mo> <mi>V</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo stretchy="false">)</mo> <mi>u</mi> <mo>+</mo> <mi>ϕ</mi> <mi>u</mi> <mo>=</mo> <mi>f</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo>,</mo> <mi>u</mi> <mo stretchy="false">)</mo> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>3</mn> </msup> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>ϕ</mi> <mo>+</mo> <msup> <mi>a</mi> <mn>2</mn> </msup> <msup> <mi mathvariant="normal">Δ</mi> <mn>2</mn> </msup> <mi>ϕ</mi> <mo>=</mo> <mn>4</mn> <mi>π</mi> <msup> <mi>u</mi> <mn>2</mn> </msup> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>3</mn> </msup> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>and under an appropriate assumption on <i>V</i>(<i>x</i>), we consider a weaker condition on <i>f</i>(<i>x</i>,&#xa0;<i>u</i>), which is asymptotically cubic to replace the usual super-cubic condition. In this case, we establish the existence of one radial ground state sign-changing solution <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1291_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">\(u_\lambda \)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>u</mi> <mi>λ</mi> </msub> </math></EquationSource> </InlineEquation> with precisely two nodal domains. In addition, we prove that the energy of any radial sign-changing solution is strictly larger than two times the least energy. Secondly, we consider the following system which lacks compactness: <Equation ID="Equ108"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1291_Article_Equ108.gif" Format="GIF" Height="43" Rendition="HTML" Resolution="72" Type="Linedraw" Width="313" /> </MediaObject> <EquationSource Format="TEX">\(\begin{aligned} {\left\{ \begin{array}{ll}-\Delta u+V(x)u+\phi u=K(x)f(u), &amp; x\in \mathbb {R}^3\\ -\Delta \phi +a^2\Delta ^2\phi =4\pi u^2, &amp; x\in \mathbb {R}^3\end{array}\right. }\end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mfenced open="{"> <mrow> <mtable> <mtr> <mtd columnalign="left"> <mrow> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>u</mi> <mo>+</mo> <mi>V</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo stretchy="false">)</mo> <mi>u</mi> <mo>+</mo> <mi>ϕ</mi> <mi>u</mi> <mo>=</mo> <mi>K</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo stretchy="false">)</mo> <mi>f</mi> <mo stretchy="false">(</mo> <mi>u</mi> <mo stretchy="false">)</mo> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>3</mn> </msup> </mrow> </mtd> </mtr> <mtr> <mtd columnalign="left"> <mrow> <mrow /> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>ϕ</mi> <mo>+</mo> <msup> <mi>a</mi> <mn>2</mn> </msup> <msup> <mi mathvariant="normal">Δ</mi> <mn>2</mn> </msup> <mi>ϕ</mi> <mo>=</mo> <mn>4</mn> <mi>π</mi> <msup> <mi>u</mi> <mn>2</mn> </msup> <mo>,</mo> </mrow> </mtd> <mtd columnalign="left"> <mrow> <mi>x</mi> <mo>∈</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>3</mn> </msup> </mrow> </mtd> </mtr> </mtable> </mrow> </mfenced> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>where <i>V</i>, <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1291_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="95" /> </InlineMediaObject> <EquationSource Format="TEX">\(K\in \mathcal {C}(\mathbb {R}^3,\mathbb {R})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>K</mi> <mo>∈</mo> <mi mathvariant="script">C</mi> <mo stretchy="false">(</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>3</mn> </msup> <mo>,</mo> <mi mathvariant="double-struck">R</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="12215_2025_1291_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="84" /> </InlineMediaObject> <EquationSource Format="TEX">\(f\in \mathcal {C}(\mathbb {R},\mathbb {R})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>f</mi> <mo>∈</mo> <mi mathvariant="script">C</mi> <mo stretchy="false">(</mo> <mi mathvariant="double-struck">R</mi> <mo>,</mo> <mi mathvariant="double-struck">R</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, and here we use a weaker growth condition of <i>f</i>(<i>u</i>). With some new tricks and inequalities, we overcome the compactness and establish the existence of one ground state sign-changing solution with precisely two nodal domains.</p>

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Ground state sign-changing solutions for asymptotically cubic or super-cubic Schrödinger-Bopp-Podolsky systems

  • Haonan Zheng,
  • Lin Li,
  • Shangjie Chen,
  • Donal O’Regan

摘要

In this paper, we will study ground state sign-changing solutions for asymptotically cubic or super-cubic Schrödinger-Bopp-Podolsky systems in two situations. Firstly, we consider the following system: \(\begin{aligned}{\left\{ \begin{array}{ll}-\Delta u+V(x)u+\phi u=f(x,u), & x\in \mathbb {R}^3\\ -\Delta \phi +a^2\Delta ^2\phi =4\pi u^2, & x\in \mathbb {R}^3\end{array}\right. }\end{aligned}\) - Δ u + V ( x ) u + ϕ u = f ( x , u ) , x R 3 - Δ ϕ + a 2 Δ 2 ϕ = 4 π u 2 , x R 3 and under an appropriate assumption on V(x), we consider a weaker condition on f(xu), which is asymptotically cubic to replace the usual super-cubic condition. In this case, we establish the existence of one radial ground state sign-changing solution \(u_\lambda \) u λ with precisely two nodal domains. In addition, we prove that the energy of any radial sign-changing solution is strictly larger than two times the least energy. Secondly, we consider the following system which lacks compactness: \(\begin{aligned} {\left\{ \begin{array}{ll}-\Delta u+V(x)u+\phi u=K(x)f(u), & x\in \mathbb {R}^3\\ -\Delta \phi +a^2\Delta ^2\phi =4\pi u^2, & x\in \mathbb {R}^3\end{array}\right. }\end{aligned}\) - Δ u + V ( x ) u + ϕ u = K ( x ) f ( u ) , x R 3 - Δ ϕ + a 2 Δ 2 ϕ = 4 π u 2 , x R 3 where V, \(K\in \mathcal {C}(\mathbb {R}^3,\mathbb {R})\) K C ( R 3 , R ) and \(f\in \mathcal {C}(\mathbb {R},\mathbb {R})\) f C ( R , R ) , and here we use a weaker growth condition of f(u). With some new tricks and inequalities, we overcome the compactness and establish the existence of one ground state sign-changing solution with precisely two nodal domains.