具有时变翻转率的选民模型

非线性Q投票模型

The non-linear q-voter model

我们引入了一个非线性的变体的选民模型，q-选民模型，其中q邻居（可能重复）的选民咨询改变意见。如果q个邻居同意，投票者接受他们的意见;如果他们没有一致的意见，投票者仍然可以以概率$ε$翻转其状态。我们在一个完全连接的网络上（即在平均场中）求解模型，并计算退出概率以及达成共识的平均时间。我们分析了最近提出的朗之万方程的角度，旨在描述两个（$Z_2$对称）吸收状态的系统中的通用相变的结果。我们发现，在平均场中，q-选民模型对于高$ε$表现出无序相位，而对于低$ε$表现出有序相位，从一个到另一个有三种可能的方式：（一）独特（广义选民样）过渡，（ii）一系列的两个连续的伊辛样和定向渗滤过渡，和（iii）一系列的两个过渡，包括最终状态取决于初始条件的中间状态。这第三个（迄今未探索）的情况下，出现了一种新的类型的有序动力学，是合理的，并发现是特定的平均场，即波动明确显示洗出来的空间扩展系统。

Pair approximation for the noisy threshold $q$-voter model

In the standard $q$-voter model, a given agent can change its opinion only if there is a full consensus of the opposite opinion within a group of influence of size $q$. A more realistic extension is the threshold $q$-voter, where a minimal agreement (at least $0<q_0\le q$ opposite opinions) is sufficient to flip the central agent's opinion, including also the possibility of independent (non conformist) choices. Variants of this model including non-conformist behavior have been previously studied in fully connected networks (mean-field limit). Here we investigate its dynamics in random networks…

随机重置下的Voter模型

Voter model under stochastic resetting

本文研究随机重置下的Voter模型，推导了平均意见态与两点函数的动力学方程，揭示了重置诱导的非平衡稳态特性，给出了畴壁密度的闭式表达及零点可微的维度条件。

Anomalous diffusion and long-range memory in the scaled voter model

We analyze the scaled voter model, which is a generalization of the noisy voter model with time-dependent herding behavior. We consider the case when the intensity of herding behavior grows as a power-law function of time. In this case, the scaled voter model reduces to the usual noisy voter model, but it is driven by the scaled Brownian motion. We derive analytical expressions for the time evolution of the first and second moments of the scaled voter model. In addition, we have derived an analytical approximation of the first passage time distribution. By numerical simulation, we confirm our …

Analysis of the earlier times and flux of the entropy on the majority voter model with difusion

We study the properties of nonequilibrium systems modelled as spin models without defined Hamiltonian as the majority voter model. This model has transition probabilities that do not satisfy the condition of detailed balance. The lack of detailed balance leads to entropy production phenomena, which are a hallmark of the irreversibility. By considering that voters can diffuse on the lattice we analyze how the entropy production and how the critical properties are affected by this diffusion. We also explore two important aspects of the diffusion effects on the majority voter model by studying en…

Ordering dynamics in the voter model with aging

The voter model with memory-dependent dynamics is theoretically and numerically studied at the mean-field level. The `internal age', or time an individual spends holding the same state, is added to the set of binary states of the population, such that the probability of changing state (or activation probability $p_i$) depends on this age. A closed set of integro-differential equations describing the time evolution of the fraction of individuals with a given state and age is derived, and from it analytical results are obtained characterizing the behavior of the system close to the absorbing sta…