Eur. Phys. J. B 63, 93-100 (2008)
https://doi.org/10.1140/epjb/e2008-00212-0

Spontaneous-search method and short-time dynamics: applications to the Domany-Kinzel cellular automaton

¹ Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Campus Universitário, C.P. 1641, 59072-970 Natal, RN, Brazil
² Departamento de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59078-972 Natal, RN, Brazil
³ Centro Brasileiro de Pesquisas Físicas, Rua Xavier Sigaud 150, 22290-180 Rio de Janeiro, RJ, Brazil

Corresponding author: ^a fdnobre@cbpf.br

Received: 3 May 2007
Revised: 1 April 2008
Published online: 6 June 2008

Abstract

The one-dimensional Domany-Kinzel cellular automaton is investigated by two numerical approaches: (i) the spontaneous-search method, which is a method appropriated for a search of criticality; (ii) short-time dynamics. Both critical frontiers of the system are investigated, namely, the one separating the frozen and active phases, as well as the critical line determined by damage spreading between two cellular automata, that splits the active phase into the nonchaotic and chaotic phases. The efficiency of the spontaneous-search method is established herein through a precise estimate of both critical frontiers, and in addition to that, it is shown that this method may also be used in the determination of the critical exponent ν_⊥. Using the critical frontiers obtained, other exponents are estimated through short-time dynamics. It is verified that the critical exponents of both critical frontiers fall in the universality class of directed percolation.