Contact process in disordered and periodic binary two-dimensional lattices.

Contact process in disordered and periodic binary two-dimensional lattices.
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无序和周期性二元二维晶格中的接触过程。

DOI:
10.1103/physreve.78.041117
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发表时间:
2008
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
Fallert SV
Fallert SV
中科院分区:
--
文献类型:
--
作者:
Fallert SV

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相似文献

利用MonteCarlo模拟、解析近似和标准平均场理论对无序和周期性二元二维晶格中接触过程的临界行为进行了数值研究。数值计算的相分离线被发现同意与分析预测周围的均匀点。对于无序的情况下,静态标度指数的值通过准静态模拟发现,无序强度的变化。特别是,感染站点密度的有限尺度标度指数接近一个与存在无限随机不动点相一致的值,正如之前对无序CP所证明的那样。同时,无论是动态和静态标度指数被发现符合所建立的值为均匀的情况下,从而确认在非均匀环境中的接触过程属于定向渗流普适类。
The critical behavior of the contact process (CP) in disordered and periodic binary two-dimensional (2D) lattices is investigated numerically by means of Monte Carlo simulations as well as via an analytical approximation and standard mean field theory. Phase-separation lines calculated numerically are found to agree well with analytical predictions around the homogeneous point. For the disordered case, values of static scaling exponents obtained via quasistationary simulations are found to change with disorder strength. In particular, the finite-size scaling exponent of the density of infected sites approaches a value consistent with the existence of an infinite-randomness fixed point as conjectured before for thedisordered CP. At the same time, both dynamical and static scaling exponents are found to coincide with the values established for the homogeneous case thus confirming that the contact process in a heterogeneous environment belongs to the directed percolation universality class.
DOI: 10.1103/physreve.74.041121
发表时间: 2006
期刊: Physical Review E
影响因子: 2.4
作者:
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通讯作者: M. J. Oliveira
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