Noise-induced transport of two coupled particles

Stefan Klumpp, Andreas Mielke, and Christian Wald
Phys. Rev. E 63, 031914 – Published 27 February 2001
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Abstract

We study the motion of two harmonically coupled particles in a sawtooth potential. The particles are subject to temporally correlated multiplicative noise. The stationary current is calculated in an expansion about the limit of rigid coupling. For two coupled particles a driving mechanism occurs which is different from the one occurring in the case of a single particle. In particular this mechanism does not need diffusion. Depending on the equilibrium distance of the particles and the coupling constant, a current reversal occurs. Possible relevance as a model for motor proteins is discussed.

  • Received 3 April 2000

DOI:https://doi.org/10.1103/PhysRevE.63.031914

©2001 American Physical Society

Authors & Affiliations

Stefan Klumpp*, Andreas Mielke, and Christian Wald

  • Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany

  • *Present address: Max-Planck-Institut für Kolloid- und Grenzflächenforschung, 14424 Potsdam, Germany. Email address: klumpp@mpikg-golm.mpg.de
  • Email address: mielke@tphys.uni-heidelberg.de
  • Email address: wald@tphys.uni-heidelberg.de

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Issue

Vol. 63, Iss. 3 — March 2001

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