Transfer Matrix and Thermodynamic Integration : An Application to the Model of Attractive Rigid Spheres in the Lattice

In this paper two techniques used to esteem greatness in calculations of Monte Carlo that cannot be written directly in the form of average of some state function are related with the model of attractive rigid spheres in the lattice. The first technique (Tranfer Matrix) relates the greatness with amounts that can be written in the form of averages of usual state functions, in that way is possible to calculate those greatness directly, through an only simulation of Monte Carlo. The second technique (Thermodynamic Integration) accomplishes an integration of the greatness during several simulations of Monte Carlo