title: Dispersionless transport in a washboard potential.
abstract: We study and characterize a new dynamical regime of underdamped particles in a tilted washboard potential. We find that for small friction in a finite range of forces the particles move essentially nondispersively, that is, coherently, over long intervals of time. The associated distribution of the particle positions moves at an essentially constant velocity and is far from Gaussian-like. This new regime is complementary to, and entirely different from, well-known nonlinear response and large dispersion regimes observed for other values of the external force.
authors.affiliation: Department of Chemistry and Biochemistry 0340, and Institute for Nonlinear Science, University of California, San Diego, La Jolla, California 92093-0340, USA.
authors.forename: Katja
authors.initials: K
authors.lastname: Lindenberg
authors.forename: J M
authors.initials: JM
authors.lastname: Sancho
authors.forename: A M
authors.initials: AM
authors.lastname: Lacasta
authors.forename: I M
authors.initials: IM
authors.lastname: Sokolov