Propagation of critical behavior for unitary invariant plus GUE random matrices

Abstract:

It is a well known and celebrated fact that the eigenvalues of random Hermitian matrices from a unitary invariant ensemble form a determinantal point process with correlation kernel given in terms of a system of orthogonal polynomials on the real line. It is a much more recent result that the eigenvalues of the sum of such a random matrix with a matrix from the Gaussian unitary ensemble (GUE) also forms a determinantal point process, with the kernel given in terms of the Weierstrass transform of the original kernel. I’ll talk about the case in which the limiting distribution of eigenvalues is critical in the sense that there is a non-generic scaling limit for the correlation kernel, and discuss the effect of a Gaussian perturbation on the limiting critical kernel. This is joint work with Tom Claeys, Arno Kuijlaars, and Dong Wang.

Date: Nov 24, 2016 at 16:30 h
Venue: Beauchef 851, Torre Norte, Séptimo Piso, Sala de Seminarios John Von Neumann
Speaker: Karl Liechty
Affiliation: DePaul University
Coordinator: Prof. Daniel Remenik
Abstract:
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Posted on Nov 17, 2016 in Núcleo Modelos Estocásticos de Sistemas Complejos y Desordenados, Seminars