Campana, L.S.; Cavallo, A.; De Cesare, L.; Esposito, U.; … - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 4, pp. 1087-1096
A study of the d-dimensional classical Heisenberg ferromagnetic model in the presence of a magnetic field is performed within the two-time Green function’s framework in classical statistical physics. We extend the well known quantum Callen method to derive analytically a new formula for...