Large random correlations in individual mean field spin glass samples

Alain Billoire, Imre Kondor, Jovanka Lukic, Enzo Marinari

Research output: Contribution to journalArticle

4 Citations (Scopus)


We argue that complex systems must possess long range correlations and illustrate this idea on the example of the mean field spin glass model. Defined on the complete graph, this model has no genuine concept of distance, but the long range character of correlations is translated into a broad distribution of the spin-spin correlation coefficients for almost all realizations of the random couplings. When we sample the whole phase space we find that this distribution is indeed so broad that at low temperatures it essentially becomes uniform, with all possible correlation values appearing with the same probability. The distribution of correlations inside a single phase space valley is also studied and found to be much narrower.

Original languageEnglish
Article numberP02009
JournalJournal of Statistical Mechanics: Theory and Experiment
Issue number2
Publication statusPublished - Feb 1 2011



  • disordered systems (theory)
  • ergodicity breaking (theory)
  • spin glasses (theory)

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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