A renormalization group approach to crowd psychology and inter-group coupling in social many-body systems

Chul Koo Kim, Kong Ju Bock Lee, Myung Hoon Chung

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

By adopting majority rule within a renormalization group approach, we can show that the strength of inter-group interaction in a social system either grows or shrinks monotonically with increasing gc with group size regardless of the initial strength. Our approach clearly demonstrates that the phenomena of crowd psychology, such as an extreme anti-reaction between different ethnic or ideological groups, could be a consequence of the many-particle nature of social systems when the initial strength of the interaction is larger than a critical value. The effect of neutral opinion holders is critically examined using the spin-one Ising model. The critical size of the population of neutral opinion holders, that can prevent crowd polarization, depends on the block spin rule.

Original languageEnglish
Pages (from-to)247-252
Number of pages6
JournalChinese Science Bulletin
Volume57
Issue number2-3
DOIs
StatePublished - Jan 2012

Keywords

  • block spin
  • crowd psychology
  • renormalization

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