Abstract
The existence of correlated domains indicates the importance of units acting in concert and the concomitant irrelevance of local atomic properties of a given system. Thus, one looks for a methodology that takes account of the growth of correlated domains near the critical point, beginning with the atomic domain and ending up at the critical point, where the domain size reaches an infinite size. The general procedure relies extensively on the block method pioneered by Kadanoff1that involves a coarse graining process. This method is best conveyed by once more resorting to a set of spins Sj=±1 (in units of ℏ2) distributed on sites j of a d-dimensional hypercubic lattice with lattice constant a. 1L. Kadanoff, Physics2, 263 (1966).
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