title: Ideal chains with fixed self-intersection rate.
abstract: We consider ideal chains in a hypercubic lattice Z(d), d≥3, with a fixed ratio m of self-intersection per monomer. Despite the simplicity of the geometrical constraint, this model shows some interesting properties, such as a collapse transition for a critical value m(c). Numerical simulations show a self-avoiding-walk-like behavior for m<m(c), and a compact cluster configuration for m>m(c). The collapse seems to show the same characteristics as the canonical thermodynamical models for the coil-globule transition.
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma, Roma, Italy. simone.franchini@yahoo.it
authors.forename: Simone
authors.initials: S
authors.lastname: Franchini