From Langevin to generalized Langevin equations for the nonequilibrium Rouse model

摘要

We investigate the nature of the effective dynamics and statistical forces obtained after integrating outnnonequilibrium degrees of freedom. To be explicit, we consider the Rouse model for the conformational dynamicsnof an ideal polymer chain subject to steady driving. We compute the effective dynamics for one of the manynmonomers by integrating out the rest of the chain. The result is a generalized Langevin dynamics for which wengive the memory and noise kernels and the effective force, and we discuss the inherited nonequilibrium aspects.