Tuesday, July 9, 2013

1307.2207 (Dmitry Panchenko)

Hierarchical exchangeability of pure states in mean field spin glass

Dmitry Panchenko
The main result in this paper is motivated by the M\'ezard-Parisi ansatz which predicts a very special structure for the distribution of spins in diluted mean field spin glass models, such as the random K-sat model. Using the fact that one can safely assume the validity of the Ghirlanda-Guerra identities in these models, we prove hierarchical exchangeability of pure states for the asymptotic Gibbs measures, which allows us to apply a representation result for hierarchically exchangeable arrays recently proved in arXiv:1301.1259. Comparing this representation with the predictions of the M\'ezard-Parisi ansatz, one can see that the key property still missing is that the multi-overlaps between pure states depend only on their overlaps.
View original: http://arxiv.org/abs/1307.2207

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