D'Auria, A. Caramico; De Cesare, L.; Rabuffo, I. - In: Physica A: Statistical Mechanics and its Applications 205 (1994) 4, pp. 718-737
Criticality of n-vector quantum systems is studied, via a renormalization group treatment, assuming a pair interaction which decays as a power law involving a characteristics parameter θ. Within a “single”-expansion parameter scheme for finite values of θ, a novel fixed point appears for...