Phase transitions in social impact models of opinion formation

被引：113
作者：
机构：
[1] Faculty of Physics, Warsaw Univ. Technol., K., Warsaw
[2] Institute of Physics, Humboldt Univ., Unter Den L., Berlin
[3] Max Planck Inst. Phys. Complex Syst., Nöthnitzer Str. 38, D-01187, Dresden
[4] Real World Computing Partnership, Theor. Found. GMD Lab., Schloss B., Sankt Augustin
来源：
Holyst, Janusz A. | 2000年 / Elsevier Science Publishers B.V., Amsterdam, Netherlands卷 / 285期
关键词：
D O I：
10.1016/S0378-4371(00)00282-X
中图分类号：
学科分类号：
摘要：
We study phase transitions in models of opinion formation which are based on the social impact theory. Two different models are discussed: (i) a cellular-automata-based model of a finite group with a strong leader where persons can change their opinions but not their spatial positions, and (ii) a model with persons treated as active Brownian particles interacting via a communication field. In the first model, two stable phases are possible: a cluster around the leader, and a state of social unification. The transition into the second state occurs for a large leader strength and/or for a high level of social noise. In the second model, we find three stable phases, which correspond either to a 'paramagnetic' phase (for high noise and strong diffusion), a 'ferromagnetic' phase (for small nose and weak diffusion), or a phase with spatially separated 'domains' (for intermediate conditions).
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页码：199 / 210
页数：11
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