Physics – Mathematical Physics
Scientific paper
2006-10-09
Commun.Math.Phys.276:727-772,2007
Physics
Mathematical Physics
57 pages, Latex, 2 figures and 3 references added
Scientific paper
10.1007/s00220-007-0352-x
We give a rigorous nonperturbative construction of a massless discrete trajectory for Wilson's exact renormalization group. The model is a three dimensional Euclidean field theory with a modified free propagator. The trajectory realizes the mean field to critical crossover from the ultraviolet Gaussian fixed point to an analog recently constructed by Brydges, Mitter and Scoppola of the Wilson-Fisher nontrivial fixed point.
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