| Texto completo | |
| Autor(es): |
Fiore, Carlos E.
;
Landi, Gabriel T.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review E; v. 90, n. 3, p. 6-pg., 2014-09-18. |
| Resumo | |
It is known that diffusion provokes substantial changes in continuous absorbing phase transitions. Conversely, its effect on discontinuous transitions is much less understood. In order to shed light in this direction, we study the inclusion of diffusion in the simplest one-dimensional model with a discontinuous absorbing phase transition, namely, the long-range contact process (sigma-CP). Particles interact as in the usual CP, but the transition rate depends on the length l of inactive sites according to 1 + al(-sigma), where a and sigma are control parameters. The inclusion of diffusion in this model has been investigated by numerical simulations and mean-field calculations. Results show that there exists three distinct regimes. For sufficiently low and large sigma's the transition is, respectively, always discontinuous or continuous, independently of the strength of the diffusion. On the other hand, in an intermediate range of sigma's, the diffusion causes a suppression of the phase coexistence leading to a continuous transition belonging to the directed percolation universality class. (AU) | |
| Processo FAPESP: | 14/01218-2 - Processos estocásticos aplicados a sistemas fora do equilíbrio |
| Beneficiário: | Gabriel Teixeira Landi |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |