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[论文解读] Environment-Driven Emergence of Higher-Order Collective Behavior

F. S. Abril, David N. Fisher|arXiv (Cornell University)|Feb 16, 2026
Opinion Dynamics and Social Influence被引用 0
一句话总结

论文表明在没有直接交互的情况下,共享随机环境也可产生高阶集体行为;证明了时间无关环境耦合的不可行性定理,并显示了随时间变化耦合与确定性相互作用下的冗余–协同转变。

ABSTRACT

Collective behavior is commonly attributed to direct interactions among system components. Using a minimal stochastic model, we show that higher-order collective structure can instead emerge from shared stochastic environments, even in the absence of interactions. Quantified via the O-information, environmental fluctuations induce both redundant and synergistic dependencies, with the latter occupying larger regions of the correlation space. We establish a no-go theorem showing that time-independent coupling between the system variables and a shared stochastic environment rules out synergistic higher-order behavior. Crucially, this constraint can be overcome dynamically: transitions between redundancy and synergy arise from time-dependent environmental coupling or from the nontrivial interplay between shared environments and direct interactions. Together, these results identify environmental mediation as a distinct mechanism of higher-order collective organization beyond the conventional interaction-centric paradigm.

研究动机与目标

  • 理解高阶依赖如何在成对交互之外出现的动机与意义。
  • 探究共享环境波动在驱动冗余与协同中的作用。
  • 描述相关空间中将冗余与协同分隔开的几何边界。
  • 研究在何种条件下会发生冗余与协同之间的转变。
  • 考察环境调解与确定性相互作用在塑造集体行为中的相互作用。

提出的方法

  • 给出一个最小的三变量Langevin模型,耦合于一个共享Wiener过程和局部噪声。
  • 推导在非相互作用、时间无关环境情况下的联合分布和O-信息的解析表达式。
  • 从时变联合PDF或通过数值Euler–Maruyama模拟计算O-信息。
  • 通过对称多项式定义确定性相互作用项m(z),以编码单变量、成对和三元相互作用。
  • 在相关空间中识别O-information符号变化的几何边界。
  • 显示时间依赖的环境耦合可以驱动冗余到协同的转变。
Figure 1: System composed of three elements with state variables $z_{1}(t)$ , $z_{2}(t)$ , and $z_{3}(t)$ . The evolution of all elements is affected by a shared global environment represented by a stochastic process $W(t)$ and by local environment factors $W_{1}(t)$ , $W_{2}(t)$ , and $W_{3}(t)$ .
Figure 1: System composed of three elements with state variables $z_{1}(t)$ , $z_{2}(t)$ , and $z_{3}(t)$ . The evolution of all elements is affected by a shared global environment represented by a stochastic process $W(t)$ and by local environment factors $W_{1}(t)$ , $W_{2}(t)$ , and $W_{3}(t)$ .

实验结果

研究问题

  • RQ1共享随机环境是否单独能够在没有直接交互的情况下产生三阶的核心依赖?
  • RQ2在何种条件下(静态 vs 动态环境耦合)协同出现或消失?
  • RQ3确定性高阶相互作用如何与环境耦合相互作用以塑造冗余与协同?
  • RQ4相关空间中 delineate 冗余与协同的几何结构是什么?
  • RQ5由于环境耦合的时间变化还是由于与直接相互作用的相互作用而导致冗余与协同之间的转变?

主要发现

  • 即使m(z)=0(无直接相互作用),来自共享环境的协同高阶行为也可出现。
  • 对共享环境的时间无关耦合不能产生协同(不可行性结论)。
  • 时间依赖的环境耦合可以驱动从冗余到协同的转变。
  • 在所探讨的条件下,协同在相关空间中占据比冗余更大区域。
  • 确定性相互作用既可以增强也可以抵消环境驱动的效应,从而实现冗余–协同转变。
  • 冗余模式受限于成对相关性的特定符号/幅值模式,而协同模式的允许性更广。
Figure 2: Phase diagram of redundancy (green) and synergy (red) in triplet correlation space. (a,b) Two-dimensional slices of the correlation space $\left(\rho_{12},\rho_{13},\rho_{23}\right)\!\in\!\left[-1,1\right]^{3}$ at fixed $\rho_{23}$ , showing the sign of the O-information: redundant regions
Figure 2: Phase diagram of redundancy (green) and synergy (red) in triplet correlation space. (a,b) Two-dimensional slices of the correlation space $\left(\rho_{12},\rho_{13},\rho_{23}\right)\!\in\!\left[-1,1\right]^{3}$ at fixed $\rho_{23}$ , showing the sign of the O-information: redundant regions

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