From Random Matrices to Quasiperiodic Jacobi Matrices via Orthogonal Polynomials

Details From Random Matrices to Quasiperiodic Jacobi Matrices via Orthogonal Polynomials From Random Matrices to Quasiperiodic Jacobi Matrices via Orthogonal Polynomials

2005-09-14

arxiv.org/abs/math-ph/0509029v1

Physics

Mathematical Physics

Scientific paper

We present an informal review of results on asymptotics of orthogonal polynomials, stressing their spectral aspects and similarity in two cases considered. They are polynomials orthonormal on a finite union of disjoint intervals with respect to the Szego weight and polynomials orthonormal on R with respect to varying weights and having the same union of intervals as the set of oscillations of asymptotics. In both cases we construct double infinite Jacobi matrices with generically quasiperiodic coefficients and show that each of them is an isospectral deformation of another. Related results on asymptotic eigenvalue distribution of a class of random matrices of large size are also shortly discussed.

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