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Crossover scaling from classical to non-classical critical behaviour
Sergio Caracciolo, Maria Serena Causo, Andrea Pelissetto +2
Interacting physical systems in the neighborhood of criticality (and massive continuum field theories) can often be characterized by just two physical scales: a (macroscopic) corre…
Non-analyticity of the Callan-Symanzik beta-function of O(N) models
A. Pelissetto, E. Vicari
In the framework of the 1/N-expansion we show that the Callan-Symanzik beta- function associated with the four-point coupling g is non-analytic at its zero, i.e. at the fixed-point…
Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD
H. Panagopoulos, E. Vicari
We extend to the clover improved lattice formulation of QCD the resummation of cactus diagrams, i.e. a certain class of tadpole-like gauge invariant diagrams. Cactus resummation yi…
Low-temperature effective potential of the Ising model
A. Pelissetto, E. Vicari
We study the low-temperature effective potential of the Ising model. We evaluate the three-point and four-point zero-momentum renormalized coupling constants that parametrize the e…
Crossover scaling from classical to nonclassical critical behavior
A. Pelissetto, P. Rossi, E. Vicari
We study the crossover between classical and nonclassical critical behaviors. The critical crossover limit is driven by the Ginzburg number G. The corresponding scaling functions a…
Effective potential in three-dimensional O(N) models
A. Pelissetto, E. Vicari
We consider the effective potential in three-dimensional models with O(N) symmetry. For generic values of N, and in particular for the physically interesting cases N=0,1,2,3, we de…