arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math-ph/0402042math-phmath.MP
收藏

外源高斯随机矩阵的大n极限,第一部分

Large n limit of Gaussian random matrices with external source, part I

Pavel M. Bleher, Arno B. J. Kuijlaars

摘要:

本文考虑了定义在$n\times n$厄米矩阵上的具有外部源\[ \frac{1}{Z_n} e^{-n \Tr({1/2}M^2 -AM)} dM \]的随机矩阵系综,其中$A$是一个对角矩阵,它只有两个等重的特征值$\pm a$.对于$a > 1$情形,我们建立了局部特征值相关在极限$n \to \infty$中的普遍行为,这是从酉不变随机矩阵模型中已知的。因此,局部特征值相关性表示的正弦内核在散装和艾里内核在频谱的边缘。利用$3 \times 3$ -矩阵Riemann-Hilbert问题对相关的多重Hermite多项式进行了刻画,并利用Deift/Zhou最速下降法分析了$n$大极限下的Riemann-Hilbert问题.

英文摘要:

We consider the random matrix ensemble with an external source \[ \frac{1}{Z_n} e^{-n \Tr({1/2}M^2 -AM)} dM \] defined on $n\times n$ Hermitian matrices, where $A$ is a diagonal matrix with only two eigenvalues $\pm a$ of equal multiplicity. For the case $a > 1$, we establish the universal behavior of local eigenvalue correlations in the limit $n \to \infty$, which is known from unitarily invariant random matrix models. Thus, local eigenvalue correlations are expressed in terms of the sine kernel in the bulk and in terms of the Airy kernel at the edge of the spectrum. We use a characterization of the associated multiple Hermite polynomials by a $3 \times 3$-matrix Riemann-Hilbert problem, and the Deift/Zhou steepest descent method to analyze the Riemann-Hilbert problem in the large $n$ limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑