Tricritical points with different universality classes for polymers in two dimensions

PABLO SERRA; JURGEN F. STILCK

EUROPHYSICS LETTERS

EPL ASSOCIATION

Año: 1992 vol. 17 p. 423 - 427

0295-5075

We report a numerical investigation of the tricritical behaviour of the dilute equilibrium polymerization model with annealed dilution on the square lattice using transfer matrix techniques. In general, the tricritical exponent vt is found to be compatible with the valuefor the tricritical n = 1 model. In the limit where the dilute model is equivalent to the interacting polymer model (whose tricritical point is known as the theta-point), we observe a crossover of nu_t tothe tricritical n->0 model value.