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Related Experiment Videos

Quenched disorder effects on deterministic inertia ratchets.

C M Arizmendi1, F Family, A L Salas-Brito

  • 1Department of Physics, Emory University, Atlanta, Georgia 30322, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 21, 2001
PubMed
Summary

Quenched disorder in a driven ratchet potential can reverse particle current and induce chaotic diffusion on regular paths. Conversely, disorder can regularize chaotic motion, leading to a localization effect at a particle mass-dependent threshold.

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Area of Science:

  • Physics
  • Nonlinear Dynamics
  • Statistical Mechanics

Background:

  • Studying particle dynamics in ratchet potentials is crucial for understanding directed transport.
  • The influence of quenched disorder on chaotic systems can lead to counterintuitive phenomena.
  • Periodically driven systems exhibit complex behaviors influenced by external forces and system parameters.

Purpose of the Study:

  • To investigate the impact of quenched disorder on the underdamped motion of a particle in a ratchet potential.
  • To explore the emergence of current reversal and chaotic diffusion under disorder.
  • To analyze the conditions leading to disorder-induced regularization and localization effects.

Main Methods:

  • Numerical simulations of particle trajectories in a periodically driven ratchet potential with quenched disorder.

Related Experiment Videos

  • Analysis of particle current, diffusion coefficients, and trajectory regularity.
  • Identification of a disorder threshold related to particle mass.

    • Main Results:

    • Disorder can cause current reversal and chaotic diffusion on otherwise regular trajectories.
    • Chaotic trajectories can become regularized by the presence of disorder.
    • A localization phenomenon, analogous to the Golosov phenomenon, occurs at a critical disorder level dependent on particle mass.

    Conclusions:

    • Quenched disorder significantly alters particle dynamics in driven ratchet potentials, leading to both disorder and order.
    • The observed localization effect presents potential applications in controlling particle transport.
    • The particle's mass plays a critical role in the onset of disorder-induced localization.