Finite-size scaling relations for a four-dimensional Ising model on Creutz cellular automatons
[ X ]
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Inst Physics
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The four-dimensional Ising model is simulated on Creutz cellular automatons using finite lattices with linear dimensions 4 <= L <= 8. The temperature variations and finite-size scaling plots of the specific heat and the Binder parameter verify the theoretically predicted expression near the infinite lattice critical temperature for 7, 14, and 21 independent simulations. Approximate values for the critical temperature of the infinite lattice of T-c(infinity) = 6.6965(35), 6.6961(30), 6.6960(12), 6.6800(3), 6.6801(2), 6.6802(1) and 6.6925(22) (without the logarithmic factor), 6.6921(22) (without the logarithmic factor), 6.6909(2) (without the logarithmic factor), 6.6822(13) (with the logarithmic factor), 6.6819(11) (with the logarithmic factor), and 6.6808(8) (with the logarithmic factor) are obtained from the intersection points of the specific heat curves, the Binder parameter curves, and straight line fits of specific heat maxima for 7, 14, and 21 independent simulations, respectively. As the number of independent simulations increases, the results, 6.6802(1) and 6.6808(8), are in very good agreement with the results of a series expansion of T-c(infinity), 6.6817(15) and 6.6802(2), the dynamic Monte Carlo value T-c(infinity) = 6.6803(1), the cluster Monte Carlo value T-c(infinity) = 6.680(1), and the Monte Carlo value using the Metropolis-Wolff cluster algorithm T-c(infinity) = 6.680263265+/-5 . 10(-5). The average values calculated for the critical exponent of the specific heat are a = -0.0402(15), -0.0393(12), -0.0391(11) with 7, 14, and 21 independent simulations, respectively. As the number of independent simulations increases, the result, alpha = -0.0391(11), agrees with the series expansions result, alpha = -0.12+/-0.03 and the Monte Carlo result using the Metropolis-Wolff cluster algorithm, a >= 0+/-0.04. However, alpha=-0.0391(11) is inconsistent with the renormalization group prediction of alpha=0. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3610180]
Açıklama
Anahtar Kelimeler
cellular automata, critical exponents, Ising model, Monte Carlo methods, renormalisation, specific heat
Kaynak
Low Temperature Physics
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
37
Sayı
6
Künye
closedAccess
