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Polarization-induced stress in the noisy voter model

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  • Aguilar-Janita, Miguel
  • Blanco-Alonso, Andres
  • Khalil, Nagi

Abstract

A new model for the dynamics of opinion formation is proposed and analyzed at the mean-field level. It can be regarded as a generalization of the noisy voter model in which agents update their binary states by copying others and by an intrinsic mechanism affected by the degree of polarization in the system. It also takes into account whether the agents enhance or reduce their intrinsic mechanism upon increasing polarization. Four phases or shapes of the steady-state probability of a fraction of agents in a given state are found (unimodal, bimodal, W and M). In the unimodal (resp. bimodal) phase, the copying (resp. intrinsic) mechanism is globally dominant, while in the W (resp. M) phase the copying (resp. intrinsic) mechanism is the relevant one close to the consensus states while it reduces its influence as approaching coexistence. In the thermodynamic limit, the bimodal and W phases disappear, while the unimodal and M phases prevail. The theoretical results, obtained analytically from the master equation, and the numerical simulations are in good agreement.

Suggested Citation

  • Aguilar-Janita, Miguel & Blanco-Alonso, Andres & Khalil, Nagi, 2024. "Polarization-induced stress in the noisy voter model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 647(C).
    • Handle: RePEc:eee:phsmap:v:647:y:2024:i:c:s0378437124003492
    DOI: 10.1016/j.physa.2024.129840
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    References listed on IDEAS

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