<p>We consider the asymptotic local behavior of the second correlation functions of the characteristic polynomials of sparse non-Hermitian random matrices <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">\(X_n\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>X</mi> <mi>n</mi> </msub> </math></EquationSource> </InlineEquation> whose entries have the form <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="93" /> </InlineMediaObject> <EquationSource Format="TEX">\(x_{jk}=d_{jk}w_{jk}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>x</mi> <mrow> <mi mathvariant="italic">jk</mi> </mrow> </msub> <mo>=</mo> <msub> <mi>d</mi> <mrow> <mi mathvariant="italic">jk</mi> </mrow> </msub> <msub> <mi>w</mi> <mrow> <mi mathvariant="italic">jk</mi> </mrow> </msub> </mrow> </math></EquationSource> </InlineEquation> with iid complex standard Gaussian <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="27" /> </InlineMediaObject> <EquationSource Format="TEX">\(w_{jk}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>w</mi> <mrow> <mi mathvariant="italic">jk</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and normalised iid Bernoulli(<i>p</i>) <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">\(d_{jk}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>d</mi> <mrow> <mi mathvariant="italic">jk</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>. It is shown that, as <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq5.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(p\rightarrow \infty \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>p</mi> <mo stretchy="false">→</mo> <mi>∞</mi> </mrow> </math></EquationSource> </InlineEquation>, the local asymptotic behavior of the second correlation function of characteristic polynomials near <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq6.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(z_0\in \mathbb {C}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>z</mi> <mn>0</mn> </msub> <mo>∈</mo> <mi mathvariant="double-struck">C</mi> </mrow> </math></EquationSource> </InlineEquation> coincides with those for Ginibre ensemble: it converges to a determinant with Ginibre kernel in the bulk <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq7.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(|z_0|&lt;1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">|</mo> </mrow> <msub> <mi>z</mi> <mn>0</mn> </msub> <mrow> <mo stretchy="false">|</mo> <mo>&lt;</mo> <mn>1</mn> </mrow> </mrow> </math></EquationSource> </InlineEquation>, and it is factorized if <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq8.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(|z_0|&gt;1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">|</mo> </mrow> <msub> <mi>z</mi> <mn>0</mn> </msub> <mrow> <mo stretchy="false">|</mo> <mo>&gt;</mo> <mn>1</mn> </mrow> </mrow> </math></EquationSource> </InlineEquation>. For the finite <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq9.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="42" /> </InlineMediaObject> <EquationSource Format="TEX">\(p&gt;0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>p</mi> <mo>&gt;</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>, the behavior is different and exhibits the transition between different regimes depending on values of <i>p</i> and <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10955_2024_3379_Article_IEq10.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="32" /> </InlineMediaObject> <EquationSource Format="TEX">\(|z_0|^2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">|</mo> </mrow> <msub> <mi>z</mi> <mn>0</mn> </msub> <msup> <mrow> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> </mrow> </math></EquationSource> </InlineEquation>.</p>

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Characteristic Polynomials of Sparse Non-Hermitian Random Matrices

  • Ievgenii Afanasiev,
  • Tatyana Shcherbina

摘要

We consider the asymptotic local behavior of the second correlation functions of the characteristic polynomials of sparse non-Hermitian random matrices \(X_n\) X n whose entries have the form \(x_{jk}=d_{jk}w_{jk}\) x jk = d jk w jk with iid complex standard Gaussian \(w_{jk}\) w jk and normalised iid Bernoulli(p) \(d_{jk}\) d jk . It is shown that, as \(p\rightarrow \infty \) p , the local asymptotic behavior of the second correlation function of characteristic polynomials near \(z_0\in \mathbb {C}\) z 0 C coincides with those for Ginibre ensemble: it converges to a determinant with Ginibre kernel in the bulk \(|z_0|<1\) | z 0 | < 1 , and it is factorized if \(|z_0|>1\) | z 0 | > 1 . For the finite \(p>0\) p > 0 , the behavior is different and exhibits the transition between different regimes depending on values of p and \(|z_0|^2\) | z 0 | 2 .