Ratchet and switching effects in stochastic kink dynamics

A. V. Savin, G. P. Tsironis, A. V. Zolotaryuk

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We study collective dynamics in a chain of harmonically coupled particles subjected to degenerate but asymmetric on-site double-well potentials and driven by white and exponentially correlated noise. The difference of frequencies of small-amplitude oscillations in the vicinity of the wells appears to be a sufficient condition for the existence of the soliton ratchet effect. We find directed thermally activated soliton motion while at certain critical values of either the correlation time or noise strength, a reversal (switching) of the direction of motion takes place. Furthermore, we observe stochastic soliton transport directed against an applied d.c. field.

Original languageEnglish
Pages (from-to)279-284
Number of pages6
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume229
Issue number5
DOIs
Publication statusPublished - May 26 1997

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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