Quantum ergodicity for graphs related to interval maps Academic Article uri icon

abstract

  • We prove quantum ergodicity for a family of graphs that are obtained from ergodic one-dimensional maps of an interval using a procedure introduced by Paknski et al (J. Phys. A, 34, 9303-9317 (2001)). As observables we take the L 2 functions on the interval. The proof is based on the periodic orbit expansion of a majorant of the quantum variance. Specifically, given a one-dimensional, Lebesgue-measure-preserving map of an interval, we consider an increasingly refined sequence of partitions of the interval. To this sequence we associate a sequence of graphs, whose directed edges correspond to elements of the partitions and on which the classical dynamics approximates the Perron-Frobenius operator corresponding to the map. We show that, except possibly for subsequences of density 0, the eigenstates of the quantum graphs equidistribute in the limit of large graphs. For a smaller class of observables we also show that the Egorov property, a correspondence between classical and quantum evolution in the semiclassical limit, holds for the quantum graphs in question. Springer-Verlag 2007.

published proceedings

  • COMMUNICATIONS IN MATHEMATICAL PHYSICS

author list (cited authors)

  • Berkolaiko, G., Keating, J. P., & Smilansky, U.

citation count

  • 16

complete list of authors

  • Berkolaiko, G||Keating, JP||Smilansky, U

publication date

  • July 2007