66 research outputs found
Universality of the Crossing Probability for the Potts Model for q=1,2,3,4
The universality of the crossing probability of a system to
percolate only in the horizontal direction, was investigated numerically by
using a cluster Monte-Carlo algorithm for the -state Potts model for
and for percolation . We check the percolation through
Fortuin-Kasteleyn clusters near the critical point on the square lattice by
using representation of the Potts model as the correlated site-bond percolation
model. It was shown that probability of a system to percolate only in the
horizontal direction has universal form for
as a function of the scaling variable . Here,
is the probability of a bond to be closed, is the
nonuniversal crossing amplitude, is the nonuniversal metric factor,
is the nonuniversal scaling index, is the correlation
length index.
The universal function . Nonuniversal scaling factors
were found numerically.Comment: 15 pages, 3 figures, revtex4b, (minor errors in text fixed,
journal-ref added
Search for Kosterlitz-Thouless transition in a triangular Ising antiferromagnet with further-neighbour ferromagnetic interactions
We investigate an antiferromagnetic triangular Ising model with anisotropic
ferromagnetic interactions between next-nearest neighbours, originally proposed
by Kitatani and Oguchi (J. Phys. Soc. Japan {\bf 57}, 1344 (1988)). The phase
diagram as a function of temperature and the ratio between first- and second-
neighbour interaction strengths is thoroughly examined. We search for a
Kosterlitz-Thouless transition to a state with algebraic decay of correlations,
calculating the correlation lengths on strips of width up to 15 sites by
transfer-matrix methods. Phenomenological renormalization, conformal invariance
arguments, the Roomany-Wyld approximation and a direct analysis of the scaled
mass gaps are used. Our results provide limited evidence that a
Kosterlitz-Thouless phase is present. Alternative scenarios are discussed.Comment: 10 pages, RevTeX 3; 11 Postscript figures (uuencoded); to appear in
Phys. Rev. E (1995
Avaliação morfomĂ©trica de eqĂŒinos da raça Mangalarga Marchador: Ăndices de conformação e proporçÔes corporais
Suplementação como estratégia de produção de carne de qualidade em pastagens tropicais
Dois critérios de seleção na pré- desmama em bovinos da raça Gir. 2. Efeito na classificação dos animais
Novos aditivos microbianos na ensilagem da cana-de-açĂșcar: composição bromatolĂłgica, perdas fermentativas, componentes volĂĄteis e estabilidade aerĂłbia
CaracterĂsticas da Carcaça de Bezerros Holandeses para Produção de Vitelos Recebendo Dietas com Diferentes NĂveis de Concentrado
Enteroparasitosis and their ethnographic relationship to food handlers in a tourist and economic center in ParanĂĄ, Southern Brazil
In vitro degradation of neutral detergent fiber of high-quality tropical forage according to supplementation with different nitrogenous compounds
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