On free energy of three-dimensional ising model at criticality
On free energy of three-dimensional ising model at criticality
Higher{order vertices at zero external momenta for the scalar eld theory, describing the critical behaviour of the Ising model, are studied within the eld{theoretical renormalization group (RG) approach in three dimensions.Dimensionless six{point g6 and eight{point g8 e ective coupling constants are calculated in the three{loop approximation.Their numerical values, universal at …