title: Superdiffusive comb: application to experimental observation of anomalous diffusion in one dimension.
abstract: A possible mechanism of superdiffusion of ultracold atoms in a one-dimensional polarization optical lattice, observed experimentally in Phys. Rev. Lett. 108, 093002 (2012), is suggested. The analysis is based on a consideration of anomalous diffusion in a fractal comb [Phys. Rev. E 83, 052106 (2011)]. It is shown that the transport exponent is determined by the fractal geometry of the comb due to recoil distributions resulting in Lévy flights of atoms.
authors.affiliation: Department of Physics, Technion, Haifa 32000, Israel.
authors.forename: Alexander
authors.initials: A
authors.lastname: Iomin