dorsal/arxiv
View SchemaDeviation probabilities and Sharp Berry-Esseen bound for rightmost eigenvalue of large non-Hermitian chiral random matrices
| Authors | Yutao Ma, Xujia Meng |
|---|---|
| Categories | |
| ArXiv ID | 2601.09204vv1 |
| URL | https://arxiv.org/abs/2601.09204 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
This paper provides a quantitative analysis of the rightmost eigenvalue for a chiral non-Hermitian random Dirac matrix in the maximally non-Hermitian regime ($\tau=0$). Let $(\sigma_i)_{1\le i\le n}$ be the eigenvalues with positive real part. We define the normalization constants \[ s_n = \frac{4n(n+v)}{2n+v}, \qquad \gamma_n = \frac{1}{2}\log s_n - \frac{5}{4}\log(\log s_n) - \log\bigl(2^{1/4}\pi\bigr), \] and the centered and scaled variable \[ X_n = \sqrt{2s_n\log s_n}\,\bigl(\bigl(\tfrac{n}{n+v}\bigr)^{1/4}\,\max_{1\le i\le n}\Re\sigma_i \;-\; 1 \;-\; \frac{\gamma_n}{\sqrt{2s_n\log s_n}}\bigr). \] Our main result is the following sharp Berry--Esseen bound for the convergence of $X_n$ to the Gumbel distribution: \[ \sup_{x \in \mathbb{R}} \bigl|\mathbb{P}(X_n \le x) - e^{-e^{-x}}\bigr| = \frac{25 (\log\log s_n)^2}{16 e \,\log s_n}\,\bigl(1 + o(1)\bigr), \] which holds as $n \to \infty$ for an arbitrary parameter $v \ge 0$ (which may depend on $n$). As a byproduct of our analysis, we also obtain precise large- and moderate-deviation principles for the scaled rightmost eigenvalue $\bigl(\frac{n}{n+v}\bigr)^{1/4} \max_{1\le i\le n}\Re\sigma_i$, characterizing its rate of convergence to the value $1$.
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"abstract": "This paper provides a quantitative analysis of the rightmost eigenvalue for a chiral non-Hermitian random Dirac matrix in the maximally non-Hermitian regime ($\\tau=0$). Let $(\\sigma_i)_{1\\le i\\le n}$ be the eigenvalues with positive real part. We define the normalization constants \\[ s_n = \\frac{4n(n+v)}{2n+v}, \\qquad \\gamma_n = \\frac{1}{2}\\log s_n - \\frac{5}{4}\\log(\\log s_n) - \\log\\bigl(2^{1/4}\\pi\\bigr), \\] and the centered and scaled variable \\[ X_n = \\sqrt{2s_n\\log s_n}\\,\\bigl(\\bigl(\\tfrac{n}{n+v}\\bigr)^{1/4}\\,\\max_{1\\le i\\le n}\\Re\\sigma_i \\;-\\; 1 \\;-\\; \\frac{\\gamma_n}{\\sqrt{2s_n\\log s_n}}\\bigr). \\] Our main result is the following sharp Berry--Esseen bound for the convergence of $X_n$ to the Gumbel distribution: \\[ \\sup_{x \\in \\mathbb{R}} \\bigl|\\mathbb{P}(X_n \\le x) - e^{-e^{-x}}\\bigr| = \\frac{25 (\\log\\log s_n)^2}{16 e \\,\\log s_n}\\,\\bigl(1 + o(1)\\bigr), \\] which holds as $n \\to \\infty$ for an arbitrary parameter $v \\ge 0$ (which may depend on $n$). As a byproduct of our analysis, we also obtain precise large- and moderate-deviation principles for the scaled rightmost eigenvalue $\\bigl(\\frac{n}{n+v}\\bigr)^{1/4} \\max_{1\\le i\\le n}\\Re\\sigma_i$, characterizing its rate of convergence to the value $1$.",
"arxiv_id": "2601.09204",
"authors": [
"Yutao Ma",
"Xujia Meng"
],
"categories": [
"math.PR"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Deviation probabilities and Sharp Berry-Esseen bound for rightmost eigenvalue of large non-Hermitian chiral random matrices",
"url": "https://arxiv.org/abs/2601.09204",
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