Dilution Robustness for Mean Field Ferromagnets

TL;DR

This paper compares Bernoulli and Poisson diluted mean field ferromagnets, demonstrating that despite different structural constraints, their multi-overlap identities are equivalent, indicating robustness of ferromagnetic properties.

Contribution

It rigorously derives multi-overlap identities for both models using different methods and proves their equivalence, highlighting robustness in diluted ferromagnetic networks.

Findings

Identities for multi-overlaps are the same in both models.

Structural constraints differ but lead to equivalent properties.

Robustness of ferromagnetic properties against dilution details.

Abstract

In this work we compare two different random dilution of a mean field ferromagnet: the first model is built on a Bernoulli-diluted network while the second lives on a Poisson-diluted network. While it is known that the two models have in the thermodynamic limit the same free energy we investigate on the structural constraints that the two models must fulfill. We rigorously derive for each model the set of identities for the multi-overlaps distribution using different methods for the two dilutions: constraints in the former model are obtained by studying the consequences of the self-averaging of the internal energy density, while in the latter are obtained by a stochastic-stability technique. Finally we prove that the identities emerging in the two models are the same, showing "robustness" of the ferromagnetic properties of diluted networks with respect to the details of dilution.