Predicting Optimal Lengths of Random Knots

Details Predicting Optimal Lengths of Random Knots Predicting Optimal Lengths of Random Knots

2000-11-24

arxiv.org/abs/physics/0011061v1

Letters in Mathematical Physics 55:239-247,2001

Physics

Biological Physics

Scientific paper

In thermally fluctuating long linear polymeric chain in solution, the ends come from time to time into a direct contact or a close vicinity of each other. At such an instance, the chain can be regarded as a closed one and thus will form a knot or rather a virtual knot. Several earlier studies of random knotting demonstrated that simpler knots show their highest occurrence for shorter random walks than more complex knots. However up to now there were no rules that could be used to predict the optimal length of a random walk, i.e. the length for which a given knot reaches its highest occurrence. Using numerical simulations, we show here that a power law accurately describes the relation between the optimal lengths of random walks leading to the formation of different knots and the previously characterized lengths of ideal knots of the corresponding type.

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