Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-01-08
Phys.Lett.B646:54-61,2007
Physics
Condensed Matter
Statistical Mechanics
13 pages no figures. Accepted for pubblication on Physics Letters B
Scientific paper
10.1016/j.physletb.2007.01.011
A "Kallen-Lehman" approach to Ising model, inspired by quantum field theory a
la Regge, is proposed. The analogy with the Kallen-Lehman representation leads
to a formula for the free-energy of the 3D model with few free parameters which
could be matched with the numerical data. The possible application of this
scheme to the spin glass case is shortly discussed.
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