Noise-induced transport of two coupled particles.
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.
Klumpp
S
S
Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany. klumpp@mpikg-golm.mpg.de
Mielke
A
A
Wald
C
C
D001692:Biological Transport; D003198:Computer Simulation; D004735:Energy Transfer; D008956:Models, Chemical; D015233:Models, Statistical; D020409:Molecular Motor Proteins / Q000737:chemistry*; D009038:Motion; D011506:Proteins / Q000737:chemistry*; D013269:Stochastic Processes
D020409:Molecular Motor Proteins; D011506:Proteins