Advances in Theoretical and Mathematical Physics

Volume 12 (2008)

Number 6

Positive Lyapunov exponents and localization bounds for strongly mixing potentials

Pages: 1377 – 1399



Christian Sadel

Hermann Schulz-Baldes


For a one-dimensional discrete Schrödinger operator with a weakly coupled potential given by a strongly mixing dynamical system with power law decay of correlations, we derive for all energies including the band edges and the band center a perturbative formula for the Lyapunov exponent. Under adequate hypothesis, this shows that the Lyapunov exponent is positive on the whole spectrum. This in turn implies that the Hausdorff dimension of the spectral measure is zero and that the associated quantum dynamics grows at most logarithmically in time.

Published 1 January 2008