Work

Limit Theorems for the Non-Convex Multispecies Curie–Weiss Model

Year: 2025

Type: article

Abstract: We study the thermodynamic properties of the generalized non-convex multispecies Curie–Weiss model, where interactions among different types of particles (forming the species) are encoded in a generic matrix. For spins with a generic prior distribution, we compute the thermodynamic limit of the generating functional for the moments of the Boltzmann–Gibbs measure using simple interpolation techniques. For Ising spins, we further analyze the fluctuations of the magnetization in the thermodynamic limit under the Boltzmann–Gibbs measure. It is shown that a central limit theorem (CLT) holds for a rescaled and centered vector of species magnetizations, which converges to either a centered or non-centered multivariate normal distribution, depending on the rate of convergence of the relative sizes of the species.

Source: Mathematics

DOI: 10.3390/math13081343

Authors: Francesco Camilli, Emanuele Mingione, Godwin Osabutey

Institutions: The Abdus Salam International Centre for Theoretical Physics (ICTP), University of Bologna

Language: English

Topic: Stochastic processes and statistical mechanics

Subfield: Mathematical Physics

Field: Mathematics

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Horizon 2020 Framework Programme