<p>In this paper we study the equation <Equation ID="Equ31"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="526_2025_2989_Article_Equ31.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="425" /> </MediaObject> <EquationSource Format="TEX">\(\begin{aligned} -\Delta u +(\log |\cdot |*|u|^2)u=(\log |\cdot |*|u|^q)|u|^{q-2}u, \qquad \hbox { in }{{\mathbb {R}}^2}, \end{aligned}\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <mtable> <mtr> <mtd columnalign="right"> <mrow> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>u</mi> <mo>+</mo> <mrow> <mo stretchy="false">(</mo> <mo>log</mo> <mo stretchy="false">|</mo> </mrow> <mo>·</mo> <msup> <mrow> <mo stretchy="false">|</mo> <mrow /> <mo>∗</mo> <mo stretchy="false">|</mo> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> <msup> <mrow> <mo stretchy="false">)</mo> <mi>u</mi> <mo>=</mo> <mo stretchy="false">(</mo> <mo>log</mo> <mo stretchy="false">|</mo> <mo>·</mo> <mo stretchy="false">|</mo> <mrow /> <mo>∗</mo> <mo stretchy="false">|</mo> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mi>q</mi> </msup> <msup> <mrow> <mo stretchy="false">)</mo> <mo stretchy="false">|</mo> <mi>u</mi> <mo stretchy="false">|</mo> </mrow> <mrow> <mi>q</mi> <mo>-</mo> <mn>2</mn> </mrow> </msup> <mi>u</mi> <mo>,</mo> <mspace width="2em" /> <mspace width="0.333333em" /> <mtext>in</mtext> <mspace width="0.333333em" /> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mn>2</mn> </msup> <mo>,</mo> </mrow> </mtd> </mtr> </mtable> </mrow> </math></EquationSource> </Equation>where <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="526_2025_2989_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="87" /> </InlineMediaObject> <EquationSource Format="TEX">\(8/3&lt; q &lt; 4\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>8</mn> <mo stretchy="false">/</mo> <mn>3</mn> <mo>&lt;</mo> <mi>q</mi> <mo>&lt;</mo> <mn>4</mn> </mrow> </math></EquationSource> </InlineEquation>. By means of variational arguments, we find infinitely many radially symmetric classical solutions. The main difficulties rely on the competition between the two nonlocal terms and on the presence of logarithmic kernels, which have not a prescribed sign. In addition, in order to find finite energy solutions, a suitable functional setting analysis is required.</p>

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Schrödinger equation in dimension two with competing logarithmic self-interaction

  • Antonio Azzollini,
  • Pietro d’Avenia,
  • Alessio Pomponio

摘要

In this paper we study the equation \(\begin{aligned} -\Delta u +(\log |\cdot |*|u|^2)u=(\log |\cdot |*|u|^q)|u|^{q-2}u, \qquad \hbox { in }{{\mathbb {R}}^2}, \end{aligned}\) - Δ u + ( log | · | | u | 2 ) u = ( log | · | | u | q ) | u | q - 2 u , in R 2 , where \(8/3< q < 4\) 8 / 3 < q < 4 . By means of variational arguments, we find infinitely many radially symmetric classical solutions. The main difficulties rely on the competition between the two nonlocal terms and on the presence of logarithmic kernels, which have not a prescribed sign. In addition, in order to find finite energy solutions, a suitable functional setting analysis is required.