Dissipation and lag in irreversible processesS. 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
When a system is perturbed by the variation of external parameters, a lag generally develops between the actual state of the system, , and the equilibrium state corresponding to the current parameter values, . 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.
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