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The Coil-Globule transition in self-avoiding active polymers

Abstract

We perform numerical simulations of an active fully flexible self-avoiding polymer as a function of the quality of the embedding solvent described in terms of an effective monomer-monomer interaction. Specifically, by extracting the Flory exponent of the active polymer under different conditions, we are able to pin down the location of the coil-globule transition for different strength of the active forces. Remarkably, we find that a simple rescaling of the temperature is capable of qualitatively capture the dependence of the $\Theta$-point of the polymer with the amplitude of the active fluctuations. We discuss the limits of this mapping, and suggest that a negative active pressure between the monomers, not unlike the one that has already been found in suspensions of active hard spheres, may also be present in active polymers.

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Article information


Submitted
24 Aug 2020
Accepted
09 Oct 2020
First published
13 Oct 2020

Soft Matter, 2020, Accepted Manuscript
Article type
Paper

The Coil-Globule transition in self-avoiding active polymers

S. Das, N. M. Kennedy and A. Cacciuto, Soft Matter, 2020, Accepted Manuscript , DOI: 10.1039/D0SM01526A

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