English

Aizenman's Theorem for Orthogonal Polynomials on the Unit Circle

Spectral Theory 2007-05-23 v1

Abstract

For suitable classes of random Verblunsky coefficients, including independent, identically distributed, rotationally invariant ones, we prove that if E(dθ2π(C+eiθCeiθ)kp)C1eκ1k \mathbb{E} \biggl(\int\frac{d\theta}{2\pi} \biggl|\biggl(\frac{\mathcal{C} + e^{i\theta}}{\mathcal{C} -e^{i\theta}} \biggr)_{k\ell}\biggr|^p \biggr) \leq C_1 e^{-\kappa_1 |k-\ell|} for some κ1>0\kappa_1 >0 and p<1p<1, then for suitable C2C_2 and κ2>0\kappa_2 >0, E(supn(Cn)k)C2eκ2k \mathbb{E} \bigl(\sup_n |(\mathcal{C}^n)_{k\ell}|\bigr) \leq C_2 e^{-\kappa_2 |k-\ell|} Here C\mathcal{C} is the CMV matrix.

Keywords

Cite

@article{arxiv.math/0411388,
  title  = {Aizenman's Theorem for Orthogonal Polynomials on the Unit Circle},
  author = {Barry Simon},
  journal= {arXiv preprint arXiv:math/0411388},
  year   = {2007}
}

Comments

Keywords: OPUC, random Verblunsky coefficients, localization