title: Lévy statistics for random single-molecule line shapes in a glass.
abstract: We demonstrate that the statistical behavior of random line shapes of single tetra-tert-butylterrylene chromophores embedded in an amorphous polyisobutylene matrix at T=2 K is described by Lévy statistics as predicted theoretically by Barkai, Silbey, and Zumofen [Phys. Rev. Lett. 84, 5339 (2000)]. This behavior is a manifestation of the long-range interaction between two-level systems in the glass and the single molecule. A universal amplitude ratio is investigated, which shows that the standard tunneling model assumptions are compatible with the experimental data.
authors.affiliation: Department of Chemistry and Biochemistry, Notre Dame University, Notre Dame, Indiana 46556, USA.
authors.forename: E
authors.initials: E
authors.lastname: Barkai
authors.forename: A V
authors.initials: AV
authors.lastname: Naumov
authors.forename: Yu G
authors.initials: YG
authors.lastname: Vainer
authors.forename: M
authors.initials: M
authors.lastname: Bauer
authors.forename: L
authors.initials: L
authors.lastname: Kador