Abstract
We study the antiferromagnetic Potts model on the Poissonian Erdős-Rényi random graph. By identifying a suitable interpolation structure and an extended variational principle, together with a positive temperature second-moment analysis we prove the existence of a phase transition at a positive critical temperature. Upper and lower bounds on the temperature critical value are obtained from the stability analysis of the replica symmetric solution (recovered in the framework of Derrida-Ruelle probability cascades) and from an entropy positivity argument.
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Contucci, P., Dommers, S., Giardinà, C. et al. Antiferromagnetic Potts Model on the Erdős-Rényi Random Graph. Commun. Math. Phys. 323, 517–554 (2013). https://doi.org/10.1007/s00220-013-1778-y
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DOI: https://doi.org/10.1007/s00220-013-1778-y