Measures of maximal entropy and integrated density of states for the discrete Schrodinger operator with Fibonacci potential

CDSNS Colloquium
Monday, April 9, 2012 - 11:05am
1 hour (actually 50 minutes)
Skiles 006
UC Irvine
The discrete Schrodinger operator with Fibonacci potential is a central model in the study of electronic properties of one-dimensional quasicrystals. Certain renormalization procedure allows to reduce many questions on specral properties of this operator to the questions on dynamical properties of a so called trace map. It turnes out that the trace map is hyperbolic, and its measure of maximal entropy is directly related to the integrated density of states of the Fibonacci Hamiltonian. In particular, this provides the first example of an ergodic family of Schrodinger operators with singular density of states measure for which exact dimensionality can be shown. This is a joint work with D. Damanik.