title: Noise-induced anomalous diffusion over a periodically modulated saddle.
abstract: We study analytically and numerically the anomalous diffusion across periodically modulated parabolic potential within Langevin and Fokker-Planck descriptions. We find that the probability of particles passing over the saddle is affected strikingly by the periodical modulation with average zero bias. Particularly, the initial phase plays an important role in the modulation effect. The effect of the correlation time of external Ornstein-Uhlenbeck noise on dynamical process is also discussed. A reduction in overpassing probability is observed due to finite correlation time.
authors.affiliation: Department of Physics, Huzhou Teachers College, Huzhou 313000, People's Republic of China.
authors.forename: Jun-Wen
authors.initials: JW
authors.lastname: Mao
authors.forename: Jiang-Xing
authors.initials: JX
authors.lastname: Chen
authors.forename: Wen-Hua
authors.initials: WH
authors.lastname: Huang
authors.forename: Bai-Qing
authors.initials: BQ
authors.lastname: Li
authors.forename: Wei-Kuan
authors.initials: WK
authors.lastname: Ge
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004058:Diffusion; D004735:Energy Transfer; D008956:Models, Chemical; D015233:Models, Statistical; D009991:Oscillometry / Q000379:methods*