Large deviations for the largest eigenvalue of Rademacher matrices
Large deviations for the largest eigenvalue of Rademacher matrices
复制标题
DOI:
10.1214/19-aop1398
复制
发表时间:
2018-10
期刊:
影响因子:
--
通讯作者:
A. Guionnet;Jonathan Husson
中科院分区:
文献类型:
--
作者:
A. Guionnet;Jonathan Husson
In this article, we consider random Wigner matrices, that is symmetric matrices such that the subdiagonal entries of Xn are independent, centered, and with variance one except on the diagonal where the entries have variance two. We prove that, under some suitable hypotheses on the laws of the entries, the law of the largest eigenvalue satisfies a large deviation principle with the same rate function as in the Gaussian case. The crucial assumption is that the Laplace transform of the entries must be bounded above by the Laplace transform of a centered Gaussian variable with same variance. This is satisfied by the Rademacher law and the uniform law on [sqrt{3}, sqrt{3}]. We extend our result to complex entries Wigner matrices and Wishart matrices.