Correlated percolation and tricriticality

被引:14
|
作者
Cao, L. [1 ]
Schwarz, J. M. [1 ]
机构
[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA
来源
PHYSICAL REVIEW E | 2012年 / 86卷 / 06期
基金
美国国家科学基金会;
关键词
EXPLOSIVE PERCOLATION; BOOTSTRAP PERCOLATION; PHASE-TRANSITIONS; SUDDEN EMERGENCE; K-CORE; EQUATIONS; MODELS;
D O I
10.1103/PhysRevE.86.061131
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The recent proliferation of correlated percolation models-models where the addition of edges and/or vertices is no longer independent of other edges and/or vertices-has been motivated by the quest to find discontinuous percolation transitions. The leader in this proliferation is what is known as explosive percolation. A recent proof demonstrates that a large class of explosive percolation-type models does not, in fact, exhibit a discontinuous transition [Riordan and Warnke, Science 333, 322 (2011)]. Here, we discuss two lesser known correlated percolation models-the k >= 3-core model on random graphs and the counter-balance model in two-dimensions-both exhibiting discontinuous transitions. To search for tricriticality, we construct mixtures of these models with other percolation models exhibiting the more typical continuous transition. Using a powerful rate equation approach, we demonstrate that a mixture of k = 2-core and k = 3-core vertices on the random graph exhibits a tricritical point. However, for a mixture of k-core and counter-balance vertices in two dimensions, as the fraction of counter-balance vertices is increased, numerics and heuristic arguments suggest that there is a line of continuous transitions with the line ending at a discontinuous transition, i.e., when all vertices are counter-balanced. Interestingly, these heuristic arguments may help identify the ingredients needed for a discontinuous transition in low dimensions. In addition, our results may have potential implications for glassy and jamming systems. DOI:10.1103/PhysRevE.86.061131
引用
收藏
页数:13
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