Monotonicity and condensation in homogeneous stochastic particle systems

Monotonicity and condensation in homogeneous stochastic particle systems
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均匀随机粒子系统中的单调性和凝聚性

DOI:
10.1214/17-aihp821
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发表时间:
2015
影响因子:
1.5
通讯作者:
S. Grosskinsky
S. Grosskinsky
中科院分区:
数学2区
文献类型:
--
作者:
T. Rafferty;P. Chleboun;S. Grosskinsky

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我们研究的随机粒子系统,保存的粒子密度,并表现出凝聚过渡,由于粒子的相互作用。我们限制我们的分析空间均匀系统固定有限格与固定的产品措施,其中包括以前研究的零范围或misanthrope过程。这种凝聚过程的所有已知例子都是非单调的,即动态不保持状态空间的偏序,并且正则测度(具有固定数量的粒子)不是单调有序的。对于我们的主要结果,我们证明了具有有限临界密度的凝聚均匀粒子系统必然是 非单调。在固定有限格上,即使临界密度为无穷大,凝聚也能发生,在这种情况下,我们给出了一个数值证明是单调的凝聚过程的例子,并给出了它的单调性的部分证明
We study stochastic particle systems that conserve the particle density and exhibit a condensation transition due to particle interactions. We restrict our analysis to spatially homogeneous systems on fixed finite lattices with stationary product measures, which includes previously studied zero-range or misanthrope processes. All known examples of such condensing processes are non-monotone, i.e. the dynamics do not preserve a partial ordering of the state space and the canonical measures (with a fixed number of particles) are not monotonically ordered. For our main result we prove that condensing homogeneous particle systems with finite critical density are necessarily non-monotone. On fixed finite lattices condensation can occur even when the critical density is infinite, in this case we give an example of a condensing process that numerical evidence suggests is monotone, and give a partial proof of its monotonicity
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发表时间: 2009-12
影响因子: 1.4
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