论文标题
二至一阶相变;协同进化与结构平衡
Second to first order phase transition; coevolutionary versus structural balance
论文作者
论文摘要
在社交网络中,已经通过考虑链接(结构平衡)之间的三重相互作用或节点和链接的三重相互作用(协同进化平衡)来研究平衡理论。在结构平衡理论中,链接并非彼此独立,这意味着该术语的全局效应,并且导致系统平衡状态中不连续的相位转变,这是温度的函数。但是,在协同进化的平衡中,链接仅连接两个局部节点,并且出现了连续的相变。在本文中,我们考虑两者的组合,以了解这些类型的相互作用中的哪种将确定网络的稳定性。我们有兴趣了解如何调整每个术语的鲁棒性与另一个术语的鲁棒性可能会影响系统达到平衡状态的系统。我们使用统计力学方法和平均场理论以及蒙特 - 卡洛数值模拟来研究顺序参数的行为和系统的总能量。我们发现系统的相图显示了这两个术语在不同比率相互对比和不同温度下的竞争。该系统显示一个三智度点,相当相变从连续转换为离散。同样在低温下观察到局部观点的优越性,全球视图将是确定系统在较高温度下的稳定性的主要术语。
In social networks, the balance theory has been studied by considering either the triple interactions between the links (structural balance) or the triple interaction of nodes and links (coevolutionary balance). In the structural balance theory, the links are not independent from each other, implying a global effect of this term and it leads to a discontinuous phase transition in the system's balanced states as a function of temperature. However, in the coevolutionary balance the links only connect two local nodes and a continuous phase transition emerges. In this paper, we consider a combination of both in order to understand which of these types of interactions will identify the stability of the network. We are interested to see how adjusting the robustness of each term versus the other might affect the system to reach a balanced state. We use statistical mechanics methods and the mean field theory and also the Monte-Carlo numerical simulations to investigate the behaviour of the order parameters and the total energy of the system. We find the phase diagram of the system which demonstrates the competition of these two terms at different ratios against each other and different temperatures. The system shows a tricritical point above which the phase transition switches from continuous to discrete. Also the superiority of the local perspective is observed at low temperatures and the global view will be the dominant term in determining the stability of the system at higher temperatures.