https://doi.org/10.1140/epje/s10189-024-00461-4
Regular Article
Universality class of interacting directed single- and double-strand homopolymers
, Munich, Germany
Received:
30
March
2024
Accepted:
12
November
2024
Published online:
27
November
2024
This work examines a field theory for directed homopolymers in a good solvent. The field theory is based on a lattice model for single- and double-strand polymers with length variables, direction-dependent pairing energy and interactions. As for the less explicit O(n)-symmetric model, there is a close relation to the conventional one-component branched polymer and the associated Lee-Yang problem. We derive results in the limiting cases of nearly complete denaturation and nearly complete renaturation. The single-strand critical exponent 
is calculated in two-loop order. A plausible physical realization is RNA molecules with a periodic base sequence like AUAU.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
