title: Polymer models with competing collapse interactions on Husimi and Bethe lattices.
abstract: In the framework of Husimi and Bethe lattices, we investigate a generalized polymer model that incorporates as special cases different models previously studied in the literature, namely, the standard interacting self-avoiding walk, the interacting self-avoiding trail, and the vertex-interacting self-avoiding walk. These models are characterized by different microscopic interactions, giving rise, in the two-dimensional case, to collapse transitions of an apparently different nature. We expect that our results, even though of a mean-field type, could provide some useful information to elucidate the role of such different θ points in the polymer phase diagram. These issues are at the core of a long-standing unresolved debate.
authors.affiliation: Consiglio Nazionale delle Ricerche-Istituto dei Sistemi Complessi (CNR-ISC), Dipartimento di Scienze Applicate e Tecnologia (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Pretti