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arXiv 2102.04330math.PRmath-phmath.MP
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Wigner矩阵的最大eigenvalue的Tracy-Widom律的收敛速度

Convergence rate to the Tracy-Widom laws for the largest eigenvalue of Wigner matrices

Kevin Schnelli, Yuanyuan Xu

摘要:

我们表明,波动的最大特征值的实对称或复杂的Hermitian Wigner矩阵的大小$N$收敛到Tracy-Widom法律的速率$O(N^{-1/3+ω})$,作为$N$趋于无穷大。对于Wigner矩阵,这改进了Bournard [5]对广义Wigner矩阵得到的前一个速率$O(N^{-2/9+ω})$。我们的结果遵循格林函数比较定理,最初由Erdensys,Yau和Yin [19]引入以证明边缘普适性,在更精细的光谱参数尺度上具有改进的误差估计。证明依赖于由矩阵值Ornstein-Uhlenbeck过程诱导的连续格林函数流。通过对相关函数的迭代累积量展开和递归比较,以及对高斯不变系综的相关核的一致收敛性估计,得到了矩阵项的三阶和四阶矩对主要贡献的精确估计.

英文摘要:

We show that the fluctuations of the largest eigenvalue of a real symmetric or complex Hermitian Wigner matrix of size $N$ converge to the Tracy--Widom laws at a rate $O(N^{-1/3+ω})$, as $N$ tends to infinity. For Wigner matrices this improves the previous rate $O(N^{-2/9+ω})$ obtained by Bourgade [5] for generalized Wigner matrices. Our result follows from a Green function comparison theorem, originally introduced by Erdős, Yau and Yin [19] to prove edge universality, on a finer spectral parameter scale with improved error estimates. The proof relies on the continuous Green function flow induced by a matrix-valued Ornstein--Uhlenbeck process. Precise estimates on leading contributions from the third and fourth order moments of the matrix entries are obtained using iterative cumulant expansions and recursive comparisons for correlation functions, along with uniform convergence estimates for correlation kernels of the Gaussian invariant ensembles.

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