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Josephson vortex in a ratchet potential: theory.

E Goldobin1, A Sterck, D Koelle

  • 1Institut für Schicht- und Ionentechnik (ISI), Forschungszentrum Jülich GmbH (FZJ), D-52425, Jülich, Germany. e.goldobin@fz-juelich.de

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|April 20, 2001
PubMed
Summary

We introduce a Josephson vortex ratchet, a device that rectifies AC signals into DC voltage. This novel system could lead to the development of a fluxon rectifier for energy harvesting.

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Area of Science:

  • Condensed matter physics
  • Superconductivity
  • Nonlinear dynamics

Background:

  • Josephson vortices are quantum objects exhibiting complex dynamics.
  • Ratchet mechanisms can rectify unbiased AC signals into directed motion.
  • Existing ratchets lack control over potential amplitude during experiments.

Purpose of the Study:

  • To propose and model a novel Josephson vortex ratchet.
  • To investigate the rectification of AC signals by Josephson vortices.
  • To explore the potential for developing a fluxon rectifier.

Main Methods:

  • Theoretical modeling of Josephson vortex dynamics in asymmetric potentials.
  • Numerical simulations of vortex motion under deterministic and random forces.
  • Analysis of rectification properties for different driving signals.

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Main Results:

  • Demonstrated rectification of monochromatic AC signals with zero time average.
  • Identified controllable parameters for tuning ratchet performance.
  • Distinguished Josephson vortex ratchets from conventional ones.

Conclusions:

  • The proposed Josephson vortex ratchet can rectify AC signals.
  • Tunable potential amplitude allows for control over system performance.
  • This research may lead to the development of a fluxon rectifier for energy conversion.