title: ac-driven phase-dependent directed diffusion.
abstract: We study directed diffusion of a particle in a periodic symmetric potential under the influence of a time-periodic external field. The field lowers the symmetry of the phase space flow which results in directed diffusion even if the potential and the field are reflection symmetric. We analyze the interplay between broken symmetry and dynamical chaos.
authors.affiliation: Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Yevtushenko
authors.forename: S
authors.initials: S
authors.lastname: Flach
authors.forename: K
authors.initials: K
authors.lastname: Richter