Spectral gap for multi-species exclusion processes

Spectral gap for multi-species exclusion processes
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多物种排除过程的光谱间隙

DOI:
10.1007/s10955-011-0176-0
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发表时间:
2011
影响因子:
1.6
通讯作者:
Yukio Nagahata
Yukio Nagahata
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
堀内澄子;大山淑之;Yukio Nagahata

文献摘要

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考虑Zd的齐次和非齐次超立方体中对称简单排它过程的多种群推广。在这个模型中,给定粒子数的组态的超平面不一定是不可约的。我们给出了一个使它们不可约的动力学的充分条件。此外,在它们不可约的假设下,我们给出了谱间隙(生成元第二大特征值的绝对值)的一些估计,它在流体动力学极限的研究中起着重要的作用。
We consider a multi-species generalization of the symmetric simple exclusion process in homogeneous and non-homogeneous hypercubes ofZd. In this model, the hyperplanes of configurations with given numbers of particles of each species are not necessarily irreducible. We give a sufficient condition of the dynamics to make them irreducible. In addition, assuming the irreducibility of them, we show some estimates of the spectral gap (the absolute value of the second largest eigenvalue of the generator), which plays an important role in the study of hydrodynamic limit.