title: Superdiffusion of two-dimensional Yukawa liquids due to a perpendicular magnetic field.
abstract: Stochastic transport of a two-dimensional (2D) dusty plasma liquid with a perpendicular magnetic field is studied. Superdiffusion is found to occur especially at higher magnetic fields with β of order unity. Here, β = ω(c)/ω(pd) is the ratio of the cyclotron and plasma frequencies for dust particles. The mean-square displacement MSD = 4D(α)t(α) is found to have an exponent α > 1, indicating superdiffusion, with α increasing monotonically to 1.1 as β increases to unity. The 2D Langevin molecular dynamics simulation used here also reveals that another indicator of random particle motion, the velocity autocorrelation function, has a dominant peak frequency ω(peak) that empirically obeys ω(peak)(2) = ω(c)(2) + ω(pd)(2)/4.
authors.affiliation: Los Alamos National Laboratory, Mail Stop E526, Los Alamos, New Mexico 87545, USA.
authors.forename: Yan
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA.
authors.forename: J
authors.initials: J
authors.lastname: Goree
authors.affiliation: Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: T P
authors.initials: TP
authors.lastname: Intrator
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Murillo
mesh_terms: D017357:Cyclotrons; D004058:Diffusion; D057446:Hydrodynamics; D060526:Magnetic Fields; D008962:Models, Theoretical; D009038:Motion