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arXiv · 1005.4556

Ising models on power-law random graphs

Sander Dommers·Cristian Giardinà·Remco van der Hofstad
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Abstract

We study a ferromagnetic Ising model on random graphs with a power-law degree distribution and compute the thermodynamic limit of the pressure when the mean degree is finite (degree exponent $τ>2$), for which the random graph has a tree-like structure. For this, we adapt and simplify an analysis by Dembo and Montanari, which assumes finite variance degrees ($τ>3$). We further identify the thermodynamic limits of various physical quantities, such as the magnetization and the internal energy.

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Sander Dommers, Cristian Giardinà, Remco van der Hofstad. 2010-10-12. Ising models on power-law random graphs. https://doi.org/10.1007/s10955-010-0067-9

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