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Sharp transition towards shared vocabularies in multi-agent systems

AutorBaronchelli, Andrea; Felici, Maddalena; Loreto, Vittorio; Caglioti, Emanuele; Steels, Luc
Palabras claveInteracting agent models
Scaling in socio-economic systems
Stochastic processes
New applications of statistical mechanics
Fecha de publicación2006
EditorInstitute of Physics Publishing
CitaciónJournal of Statistical Mechanics: Theory and Experiment: P06014 (2006)
ResumenWhat processes can explain how very large populations are able to converge on the use of a particular word or grammatical construction without global coordination? Answering this question helps to understand why new language constructs usually propagate along an S-shaped curve with a rather sudden transition towards global agreement. It also helps to analyse and design new technologies that support or orchestrate self-organizing communication systems, such as recent social tagging systems for the web. The article introduces and studies a microscopic model of communicating autonomous agents performing language games without any central control. We show that the system undergoes a disorder/order transition, going through a sharp symmetry breaking process to reach a shared set of conventions. Before the transition, the system builds up non-trivial scale-invariant correlations, for instance in the distribution of competing synonyms, which display a Zipf-like law. These correlations make the system ready for the transition towards shared conventions, which, observed on the timescale of collective behaviours, becomes sharper and sharper with system size. This surprising result not only explains why human language can scale up to very large populations but also suggests ways to optimize artificial semiotic dynamics.
Versión del editorhttp://dx.doi.org/10.1088/1742-5468/2006/06/P06014
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