Internal mode mechanism for collective energy transport in extended systems
Statistical Mechanics
2009-11-10 v3 Mathematical Physics
math.MP
Pattern Formation and Solitons
Classical Physics
Abstract
We study directed energy transport in homogeneous nonlinear extended systems in the presence of homogeneous ac forces and dissipation. We show that the mechanism responsible for unidirectional motion of topological excitations is the coupling of their internal and translation degrees of freedom. Our results lead to a selection rule for the existence of such motion based on resonances that explains earlier symmetry analysis of this phenomenon. The direction of motion is found to depend both on the initial and the relative phases of the two harmonic drivings, even in the presence of noise.
Cite
@article{arxiv.cond-mat/0305207,
title = {Internal mode mechanism for collective energy transport in extended systems},
author = {Luis Morales-Molina and Niurka R. Quintero and Franz G. Mertens and Angel Sanchez},
journal= {arXiv preprint arXiv:cond-mat/0305207},
year = {2009}
}
Comments
Final version, to appear in Physical Review Letters