Universality in short-range Ising spin glasses

, E.Nogueira, S Coutinho, F.d Nobre and E.M.f Curado

Physica A: Statistical Mechanics and its Applications, 1999, vol. 271, issue 1, 125-132

Abstract: The 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.

Keywords: Spin glass; Critical exponents; Universality (search for similar items in EconPapers)
Date: 1999
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:271:y:1999:i:1:p:125-132

DOI: 10.1016/S0378-4371(99)00229-0

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