Produção Nacional
Revisado por pares
Universality in short-range Ising spin glasses
1999; Elsevier BV; Volume: 271; Issue: 1-2 Linguagem: Inglês
10.1016/s0378-4371(99)00229-0
ISSN1873-2119
AutoresE.Nogueira Jr, S. Coutinho, Fernando Nobre, Evaldo M. F. Curado,
Tópico(s)Complex Network Analysis Techniques
ResumoThe role of the distribution of coupling constants in the critical exponents of the short-range Ising spin-glass model is investigated via real space renormalization group. A saddle-point spin glass critical point characterized by a fixed-point distribution is found in an appropriated parameter space. The critical exponents β and ν are directly estimated from the data of the local Edwards–Anderson order parameters for the model defined on a diamond hierarchical lattice of fractal dimension df=3. Four distinct initial distributions of coupling constants (Gaussian, bimodal, uniform and exponential) are considered; the results clearly indicate a universal behaviour.
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