Issue
EPL
Volume 87, Number 6, September 2009
Article Number 60005
Number of page(s) 6
Section General
DOI http://dx.doi.org/10.1209/0295-5075/87/60005
Published online 07 October 2009
EPL, 87 (2009) 60005
DOI: 10.1209/0295-5075/87/60005

Dissipation and lag in irreversible processes

S. Vaikuntanathan1, 2 and C. Jarzynski1, 3

1   Institute for Physical Science and Technology, University of Maryland - College Park, MD 20742, USA
2   Chemical Physics Program, University of Maryland - College Park, MD 20742, USA
3   Department of Chemistry, University of Maryland - College Park, MD 20742, USA


received 1 July 2009; accepted in final form 10 September 2009; published September 2009
published online 7 October 2009

Abstract
When a system is perturbed by the variation of external parameters, a lag generally develops between the actual state of the system, $\rho _{t}$, and the equilibrium state corresponding to the current parameter values, $\rho _{t}^{{\rm eq}}$. We establish a microscopic, quantitative relation between this lag and the dissipated work that accompanies the process. We illustrate this relation using a model system.

PACS
05.70.Ln - Nonequilibrium and irreversible thermodynamics.
05.20.-y - Classical statistical mechanics.
05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.

© EPLA 2009