Produção Nacional
Pair contact process with a particle source
2001; American Physical Society; Volume: 65; Issue: 1 Linguagem: Inglês
10.1103/physreve.65.016118
ISSN1538-4519
AutoresRonald Dickman, Wilson R. M. Rabêlo, Géza Ódor,
Tópico(s)Material Dynamics and Properties
ResumoWe study the phase diagram and critical behavior of the one-dimensional pair contact process (PCP) with a particle source using cluster approximations and extensive simulations. The source creates isolated particles only, not pairs, and so couples not to the order parameter (the pair density) but to a nonordering field, whose state influences the evolution of the order parameter. While the critical point ${p}_{c}$ shows a singular dependence on the source intensity, the critical exponents appear to be unaffected by the presence of the source, except possibly for a small change in \ensuremath{\beta}. In the course of our paper, we obtain high-precision values for the critical exponents of the standard PCP, confirming directed-percolationlike scaling.
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