Journal of Physics A Mathematical and General
On the classical limit and the problem of phase transitions
Michel V. Romerio, Walter Felipe Wreszinski
Abstract
Some aspects of the relation between proofs of both absence and existence of phase transitions for a class of quantum spin systems and their classical counterparts are discussed. The results of absence of phase transitions apply to a large class of classical systems with special symmetry already considered by Vuillermot and Romerio (1975), and to their quantum mechanical analogues.