Boundary Conditions and Correlation Functions in the v-Dimensional Ising Model at Low Temperature
نویسنده
چکیده
The boundary condition dependence of the correlation functions in a phase transition region of the thermodynamic parameters is of great importance to understand the character and properties of the phase transition itself. In this paper we study the boundary condition dependence of certain correlation functions in the Ising model at low temperature. § 1. Motivation of the Paper. A Related Problem The object of this note is the investigation of a problem, formulated in §2, related to the old question of whether the value m*(/J) for the spontaneous magnetization in the Ising model, as computed by Onsager and Yang, coincides with the appropriate derivative of the free energy f(fi,h):
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