title: Antipersistent random walk in a two state flashing magnetic potential.
abstract: We reveal the subdiffusive dynamics of paramagnetic colloids subjected to a two state flashing potential generated by periodic modulation of a magnetic bubble lattice. The particles perform a random walklike motion with antipersistent nature, showing for certain field parameters a crossover from subdiffusive to an enhanced diffusive behavior. We elucidate the stationary nature (no aging) of the subdiffusive process and stress its similarity with the random walk on a random walk model.
authors.affiliation: Estructura i Constituents de la Matèria, Universitat de Barcelona, Spain. ptierno@ub.edu
authors.forename: Pietro
authors.initials: P
authors.lastname: Tierno
authors.forename: Francesc
authors.initials: F
authors.lastname: Sagués
authors.forename: Tom H
authors.initials: TH
authors.lastname: Johansen
authors.forename: Igor M
authors.initials: IM
authors.lastname: Sokolov
mesh_terms: D003102:Colloids / Q000737:chemistry*; D004058:Diffusion; D008280:Magnetics; D008962:Models, Theoretical; D013816:Thermodynamics
chemical_list: D003102:Colloids