Energy repartition for a harmonic chain with local reservoirs
Statistical Mechanics
2017-06-13 v2
Abstract
We exactly analyze the vibrational properties of a chain of harmonic oscillators in contact with local Langevin heat baths. Nonequilibrium steady-state fluctuations are found to be described by a set of mode-temperatures, independent of the strengths of both the harmonic interaction and the viscous damping. Energy is equally distributed between the conjugate variables of a given mode but differently among different modes, in a manner which depends exclusively on the bath temperatures and on the boundary conditions. We outline how bath-temperature profiles can be designed to enhance or reduce fluctuations at specific frequencies in the power spectrum of the chain length.
Keywords
Cite
@article{arxiv.1505.05088,
title = {Energy repartition for a harmonic chain with local reservoirs},
author = {Gianmaria Falasco and Marco Baiesi and Leo Molinaro and Livia Conti and Fulvio Baldovin},
journal= {arXiv preprint arXiv:1505.05088},
year = {2017}
}
Comments
8 pages