Introduction to thermodynamics of spin models in the Hamiltonian limit
  A didactic description of the thermodynamic properties of classical spin systems is given in terms of their quantum counterpart in the Hamiltonian limit. Emphasis is on the construction of the relevant Hamiltonian, and the calculation of thermal averages is explicitly done in the case of small systems described, in Hamiltonian field theory, by small matrices. 
Bertrand Berche (LPM, Centro De Fisica), Alexander Lopez (CENTRO De   Fisica)