Eur. Phys. J. B 51, 555-561 (2006)
https://doi.org/10.1140/epjb/e2006-00246-2

Revisiting the nonequilibrium phase transition of the triplet-creation model

Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil

Corresponding author: ^a fontanari@ifsc.usp.br

Received: 28 February 2006
Revised: 18 May 2006
Published online: 22 June 2006

Abstract

The nonequilibrium phase transition in the triplet-creation model is investigated using critical spreading and the conservative diffusive contact process. The results support the claim that at high enough diffusion the phase transition becomes discontinuous. As the diffusion probability increases the critical exponents change continuously from the ordinary directed percolation (DP) class to the compact directed percolation (CDP). The fractal dimension of the critical cluster, however, switches abruptly between those two universality classes. Strong crossover effects in both methods make it difficult, if not impossible, to establish the exact location of the tricritical point.