Cited by 2,048Complex Network Analysis TechniquesOpinion Dynamics and Social InfluenceAdvanced Clustering Algorithms Research

Statistical mechanics of community detection

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Reichardt, Jörg, Bornholdt, Stefan·2006·Physical Review E

Abstract

Starting from a general ansatz, we show how community detection can be interpreted as finding the ground state of an infinite range spin glass. Our approach applies to weighted and directed networks alike. It contains the ad hoc introduced quality function from [J. Reichardt and S. Bornholdt, Phys. Rev. Lett. 93, 218701 (2004)] and the modularity Q as defined by Newman and Girvan [Phys. Rev. E 69, 026113 (2004)] as special cases. The community structure of the network is interpreted as the spin configuration that minimizes the energy of the spin glass with the spin states being the community indices. We elucidate the properties of the ground state configuration to give a concise definition of communities as cohesive subgroups in networks that is adaptive to the specific class of network under study. Further, we show how hierarchies and overlap in the community structure can be detected. Computationally efficient local update rules for optimization procedures to find the ground state are given. We show how the ansatz may be used to discover the community around a given node without detecting all communities in the full network and we give benchmarks for the performance of this extension. Finally, we give expectation values for the modularity of random graphs, which can be used in the assessment of statistical significance of community structure.

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Crossref · 10.1103/physreve.74.016110

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  • The modules in Fig. 2 were obtained with the Louvain algorithm, and similar modules are obtained when spectral clustering is used.

    “The modules in Fig. 2 were obtained with the Louvain algorithm for graph clustering38, which is designed to maximize modularity. Similar modules are obtained when spectral clustering39 is used”

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Authors
Reichardt, J., & Bornholdt, S.
Affiliations
University of Bremen (DE)
Venue
Physical Review E
Published
2006-07-18
Volume
74
Issue
1
Pages
016110-016110
ISSN
  • 1539-3755 (ISSN-L)
  • 1550-2376
OpenAlex
W2025543856
Cited by
2,048
References
3
Citations by year
2026: 71 · 2025: 115 · 2024: 112 · 2023: 130 · 2022: 155 · 2021: 169 · 2020: 157 · 2019: 122 · 2018: 136 · 2017: 136 · 2016: 116 · 2015: 100 · 2014: 93 · 2013: 101 · 2012: 78
FWCI
22.07
Type
journal article
Language
en
Open access
Locations
  • Physical Review E (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Complex Network Analysis Techniques
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Opinion Dynamics and Social Influence
  • Physical Sciences › Computer Science › Artificial Intelligence › Advanced Clustering Algorithms Research
Keywords
community detection, ground state, modularity, quality function, weighted networks, directed graphs, community structure, community hierarchy, random graphs, cohesive subgroups

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