Simulating the contact process in heterogeneous environments.
Simulating the contact process in heterogeneous environments.
复制标题
模拟异构环境中的接触过程。
DOI:
10.1103/physreve.77.051125
复制
发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Fallert SV
中科院分区:
文献类型:
--
作者:
Fallert SV
The one-dimensional contact process (CP) in a heterogeneous environment—a binary chain consisting of two types of site with different recovery rates—is investigated. It is argued that the commonly used random-sequential Monte Carlo simulation method which employs a discrete notion of time is not faithful to the rates of the contact process in a heterogeneous environment. Therefore, a modification of this algorithm along with two alternative continuous-time implementations are analyzed. The latter two are an adapted version of the-fold way used in Ising model simulations and a method based on a modified priority queue. It is demonstrated that the commonly used (but incorrect as we believe) discrete-time method yields a different critical threshold from all other algorithms considered. Finite-size scaling of the lowest gap in the spectrum of the Liouville time-evolution operator for the CP gives an estimate of the critical rate which supports these findings. Further, a performance test indicates an advantage in using the continuous-time methods in systems with heterogeneous rates. This result promises to help in the analysis of the CP in disordered systems with heterogeneous rates in which simulation is a challenging task due to very long relaxation times.
登录
查看更多内容
影响因子:
8.6
作者:
Hooyberghs, J;Iglói, F;Vanderzande, C
通讯作者:
Vanderzande, C
DOI:
10.1088/0305-4470/32/44/102
发表时间:
1999
期刊:
Journal of Physics A
影响因子:
--
作者:
J. R. G. Mendonça
通讯作者:
J. R. G. Mendonça
影响因子:
3.7
作者:
R. Santos;L. Sneddon
通讯作者:
L. Sneddon
影响因子:
4.8
作者:
Otten, W;Filipe, JAN;Gilligan, CA
通讯作者:
Gilligan, CA
DOI:
10.1088/0305-4470/22/17/032
发表时间:
1989
期刊:
Journal of Physics A
影响因子:
--
作者:
P. Grassberger
通讯作者:
P. Grassberger