On Asymptotic Properties of Large Random Matrices with Independent Entries

Details On Asymptotic Properties of Large Random Matrices with Independent Entries On Asymptotic Properties of Large Random Matrices with Independent Entries

1996-06-24

arxiv.org/abs/cond-mat/9606174v1

Physics

Condensed Matter

29 pages, LaTeX (revtex style files required) submitted to Journ Math Phys

Scientific paper

10.1063/1.531589

We study the normalized trace $g_n(z)=n^{-1} \mbox{tr} \, (H-zI)^{-1}$ of the resolvent of $n\times n$ real symmetric matrices $H=\big[(1+\delta_{jk})W_{jk}/\sqrt n\big]_{j,k=1}^n$ assuming that their entries are independent but not necessarily identically distributed random variables. We develop a rigorous method of asymptotic analysis of moments of $g_n(z)$ for $|\Im z| \ge \eta_0$ where $\eta_0$ is determined by the second moment of $W_{jk}$. By using this method we find the asymptotic form of the expectation ${\bf E}\{g_n(z)\}$ and of the connected correlator ${\bf E}\{g_n(z_1)g_n(z_2)\}- {\bf E}\{g_n(z_1)\} {\bf E}\{g_n(z_2)\}$. We also prove that the centralized trace $ng_n(z)- {\bf E}\{ng_n(z)\}$ has the Gaussian distribution in the limit $n=\infty $. Basing on these results we present heuristic arguments supporting the universality property of the local eigenvalue statistics for this class of random matrix ensembles.

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