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arXiv 0909.1597cond-mat.stat-mechcond-mat.dis-nn
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退火无标度网络中伊辛模型的临界行为

Critical behavior of the Ising model in annealed scale-free networks

Sang Hoon Lee, Meesoon Ha, Hawoong Jeong, Jae Dong Noh, Hyunggyu Park

摘要:

研究了有限系统尺寸退火无标度网络中伊辛模型的临界行为。通过将该模型映射到加权全连通伊辛模型上,我们得到了高度异质网络中相变附近的有限尺寸标度(FSS)的解析结果,其特征在于具有四种不同标度区域的截断依赖双参数标度.这些结果基本上是相同的退火SF网络中的非平衡接触过程中发现的,除了一个额外的复杂性,由于在有限系统中的平凡的临界点移动。与其他非平衡模型一样,在平衡态伊辛模型中,退火和淬火SF网络的FSS理论仍然存在着差异。我们所有的分析结果证实了合理的数值模拟。

英文摘要:

We study the critical behavior of the Ising model in annealed scale-free (SF) networks of finite system size with forced upper cutoff in degree. By mapping the model onto the weighted fully connected Ising model, we derive analytic results for the finite-size scaling (FSS) near the phase transition, characterized by the cutoff-dependent two-parameter scaling with four distinct scaling regimes, in highly heterogeneous networks. These results are essentially the same as those found for the nonequilibrium contact process in annealed SF networks, except for an additional complication due to the trivial critical point shift in finite systems. The discrepancy of the FSS theories between annealed and quenched SF networks still remains in the equilibrium Ising model, like some other nonequilibrium models. All of our analytic results are confirmed reasonably well by numerical simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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