Spectral measures of Jacobi operators with random potentials

Abstract

Let $H_\omega$ be a self-adjoint Jacobi operator with a potential sequence $\{\omega(n)\}_n$ of independently distributed random variables with continuous probability distributions and let $\mu_\phi^\omega$ be the corresponding spectral measure generated by $H_\omega$ and the vector $\phi$. We consider sets $A(\omega)$ which depend on $\omega$ in a particular way and prove that $\mu_\phi^\omega(A(\omega))=0$ for almost every $\omega$. This is applied to show equivalence relations between spectral measures for random Jacobi matrices and to study the interplay of the eigenvalues of these matrices and their submatrices.