6533b7d2fe1ef96bd125f6c0
RESEARCH PRODUCT
Polymer dynamics in time-dependent periodic potentials.
Janne KauttonenJuha MerikoskiOtto Pulkkinensubject
chemistry.chemical_classificationPhysicsStatistical Mechanics (cond-mat.stat-mech)Equations of stateFOS: Physical sciencesObservablemolekyylitPolymerFlashingNonlinear systemClassical mechanicschemistryLattice (order)Master equationMoleculepolymeeritCondensed Matter - Statistical Mechanicsdynamiikkadescription
Dynamics of a discrete polymer in time-dependent external potentials is studied with the master equation approach. We consider both stochastic and deterministic switching mechanisms for the potential states and give the essential equations for computing the stationary state properties of molecules with internal structure in time-dependent periodic potentials on a lattice. As an example, we consider standard and modified Rubinstein-Duke polymers and calculate their mean drift and effective diffusion coefficient in the two-state non-symmetric flashing potential and symmetric traveling potential. Rich non-linear behavior of these observables is found. By varying the polymer length, we find current inversions caused by the rebound effect that is only present for molecules with internal structure. These results depend strongly on the polymer type. We also notice increased transport coherence for longer polymers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-01-01 | Physical review. E, Statistical, nonlinear, and soft matter physics |