Thouless formula for random non-Hermitian Jacobi matrices

Details Thouless formula for random non-Hermitian Jacobi matrices Thouless formula for random non-Hermitian Jacobi matrices

2003-12-09

arxiv.org/abs/math-ph/0312022v1

Israel Journal of Mathematics, Vol. 148, 331-346 (2005)

Physics

Mathematical Physics

14 pages

Scientific paper

Random non-Hermitian Jacobi matrices $J_n$ of increasing dimension $n$ are considered. We prove that the normalized eigenvalue counting measure of $J_n$ converges weakly to a limiting measure $\mu$ as $n\to\infty$. We also extend to the non-Hermitian case the Thouless formula relating $\mu$ and the Lyapunov exponent of the second-order difference equation associated with the sequence $J_n$. The measure $\mu$ is shown to be log-H\"older continuous.

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