Dynamical phase transitions in Hegselmann-Krause model of opinion dynamics and consensus

Abstract

The dynamics of the model of agents with limited confidence introduced by Hegselmann and Krause exhibits multiple well-separated regimes characterised by the number of distinct clusters in the stationary state. We present indications that there are genuine dynamical phase transitions between these regimes. The main indicator is the divergence of the average evolution time required to reach the stationary state. The slowdown close to the transition is connected with the emergence of the groups of mediator agents which are very small but have decisive role in the process of social convergence. More detailed study shows that the histogram of the evolution times is composed of several peaks. These peaks are unambiguously interpreted as corresponding to mediator groups consisting of one, two, three etc. agents. Detailed study reveals that each transition possesses also an internal fine structure.

References in corpus (9)

• Statistical physics of social dynamics
• Continuous Opinion Dynamics under Bounded Confidence: A Survey
• A stabilization theorem for dynamics of continuous opinions
• Analytical results for the Sznajd model of opinion formation
• Dynamics of Non-Conservative Voters
• Noisy continuous--opinion dynamics
• Divergent Time Scale in Axelrod Model Dynamics
• Some new results on one-dimensional outflow dynamics
• Truth seekers in opinion dynamics models

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• The noisy Hegselmann-Krause model for opinion dynamics
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• The bridges to consensus: Network effects in a bounded confidence opinion dynamics model
• Commitment versus persuasion in the three-party constrained voter model
• Polarization and Consensus in a Voter Model under Time-Fluctuating Influences
• Analytical formulation for multidimensional continuous opinion models