Synchronized First-Passages in a Double-Well System
Abstract
We perform Langevin dynamic numerical simulation on a double-well potential system subjected to an asymmetric saw-tooth type external time varying field and white noise forces. The hysteresis loss calculated from the first-passage time distribution obtained shows asymmetric behaviour with respect to the asymmetry in the field sweep. The hysteresis loss, in our model, being a measure of the synchronized passages from one well to the other, indicates asymmetric "correlated" passages in the two opposing directions when driven by a temporally asymmetric external field in the presence of white noise (fluctuating) forces. The implication of our results on the phenomena of predominantly unidirectional motion of a Brownian particle in a symmetric periodic (nonratchet-like) potential is discussed.
Keywords
Cite
@article{arxiv.cond-mat/9509058,
title = {Synchronized First-Passages in a Double-Well System},
author = {Mangal C. Mahato and A. M. Jayannavar},
journal= {arXiv preprint arXiv:cond-mat/9509058},
year = {2007}
}
Comments
figures available on request