Polymer dynamics in time-dependent periodic potentials
Kauttonen, J., Merikoski, J., & Pulkkinen, O. (2008). Polymer dynamics in time-dependent periodic potentials. Physical Review E, 77(6), Article 061131. https://doi.org/10.1103/PhysRevE.77.061131
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Physical Review EDate
2008Copyright
© 2008 The American Physical Society. Published in this repository with the kind permission of the publisher.
The 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 RubinsteinDuke
polymers and calculate their mean drift and effective diffusion coefficient in the two-state nonsymmetric
flashing potential and symmetric traveling potential. Rich nonlinear 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.
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American Physical SocietyISSN Search the Publication Forum
1539-3755Keywords
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