Nonuniversality in the pair contact process with diffusion

被引:35
作者
Dickman, R
de Menezes, MAF
机构
[1] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-30161970 Belo Horizonte, MG, Brazil
[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
来源
PHYSICAL REVIEW E | 2002年 / 66卷 / 04期
关键词
D O I
10.1103/PhysRevE.66.045101
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We study the static and dynamic behavior of the one dimensional pair contact process with diffusion. Several critical exponents are found to vary with the diffusion rate, while the order-parameter moment ratio m = (rho(2)) over bar/(rho) over bar (2) grows logarithmically with system size. The anomalous behavior of m is traced to a violation of scaling in the order parameter probability density, which in turn reflects the presence of two distinct sectors, one purely diffusive, the other reactive, within the active phase. Studies restricted to the reactive sector yield precise estimates for exponents beta and nu(perpendicular to), and confirm finite size scaling. We also determine the value m(c) = 1.334 for the parity-conserving universality class in one dimension.
引用
收藏
页码:4 / 045101
页数:4
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