Topological interactions in systems of mutually interlinked polymer rings

Matthias Otto

doi:10.1088/0305-4470/37/8/003

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Topological interactions in systems of mutually interlinked polymer rings

Matthias Otto

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Abstract

The topological interaction arising in interlinked polymeric rings such as DNA catenanes is considered. More specifically, the free energy for a pair of linked random walk rings is derived where the distance $R$ between two segments each of which is part of a different ring is kept constant. The topology conservation is imposed by the Gauss invariant. A previous approach (M.Otto, T.A. Vilgis, Phys.Rev.Lett. {\bf 80}, 881 (1998)) to the problem is refined in several ways. It is confirmed, that asymptotically, i.e. for large $R\gg R_G$ where $R_G$ is average size of single random walk ring, the effective topological interaction (free energy) scales $\propto R^4$.

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Matthias Otto. 2003-09-08. Topological interactions in systems of mutually interlinked polymer rings. https://doi.org/10.1088/0305-4470%2F37%2F8%2F003

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