Perturbative series expansion for the gap of the evolution operator associated with the contact process.
Perturbative series expansion for the gap of the evolution operator associated with the contact process.
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与接触过程相关的演化算子间隙的微扰级数展开。
DOI：
10.1103/physreve.74.041121
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发表时间：
2006
影响因子：
2.4
通讯作者：
M. J. Oliveira
中科院分区：
文献类型：
--
作者：
M. J. Oliveira
利用微扰级数展开法研究了一维接触过程中演化算子的主、次本征向量的本征值之间的差距.用49个系数计算差距的级数展开。Pade近似的分析允许的临界创建率和时间相关的临界指数的测定。
The gap between the eigenvalues of the dominant and subdominant eigenvectors of the evolution operator associated with the contact process in one dimension is studied by perturbative series expansions in powers of the creation rate. The series expansion for the gap was computed with 49 coefficients. An analysis by Pade approximants allowed the determination of the critical creation rate and the time correlation critical exponent.