Universality for certain Hermitian Wigner Matrices under weak moment conditions

Details Universality for certain Hermitian Wigner Matrices under weak moment conditions Universality for certain Hermitian Wigner Matrices under weak moment conditions

2009-10-23

arxiv.org/abs/0910.4467v4

Mathematics

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31 pages. Revised version. Several errors corrected and certain sections partly rewritten

Scientific paper

We study the universality of the local eigenvalue statistics of Gaussian divisible Hermitian Wigner matrices. These random matrices are obtained by adding an independent GUE matrix to an Hermitian random matrix with independent elements, a Wigner matrix. We prove that Tracy-Widom universality holds at the edge in this class of random matrices under the optimal moment condition that there is a uniform bound on the fourth moment of the matrix elements. Furthermore, we show that universality holds in the bulk for Gaussian divisible Wigner matrices if we just assume finite second moments.

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