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Transient behaviour of a polymer dragged through a viscoelastic medium
Hans Vandebroek1, Carlo Vanderzande1
1Faculty of Sciences, Hasselt University, 3590 Diepenbeek, Belgium.
Abstract:
We study the dynamics of a polymer that is pulled by a constant force through a viscoelastic medium. This is a model for a polymer being pulled through a cell by an external force, or for an active biopolymer moving due to a self-generated force. Using the Rouse model with a memory dependent drag force, we find that the center of mass of the polymer follows a subballistic motion. We determine the time evolution of the length and the shape of the polymer. Through an analysis of the velocity of the monomers, we investigate how the tension propagates through the polymer. We discuss how polymers can be used to probe the properties of a viscoelastic medium.
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