Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-09-17
Phys. Rev. E 66 (2002) 057102
Physics
Condensed Matter
Statistical Mechanics
To be published in PRE
Scientific paper
10.1103/PhysRevE.66.057102
The one-dimensional pair contact process with a particle source is studied by using dynamical cluster mean-field approximations with sites up to $n=12$. The results obtained for different levels of approximation become convergent especially for $n \ge 6$ and allow us to derive reliable extrapolations to the limit $n \to \infty$. At the zero source limit, the critical point exhibits a discontinuity whose magnitude vanishes with $1/n$. The coherent anomaly analysis of data supports that the vanishing of order parameter and density of isolated particles has the same critical behavior. In contrast to an earlier prediction, the present approximation does not support the existence of critical behavior in the inactive phase where the frozen density of isolated particles depends on the initial state.
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