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

Author

Listed:
  • Francesco Camilli

    (Quantitative Life Sciences, International Centre for Theoretical Physics, 34151 Trieste, Italy)

  • Emanuele Mingione

    (Department of Matematics, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy)

  • Godwin Osabutey

    (Department of Matematics, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy
    Current address: Department of Physics, Computer Science and Mathematics, University of Modena and Reggio Emilia, 41121 Modena, Italy.)

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.

Suggested Citation

  • Francesco Camilli & Emanuele Mingione & Godwin Osabutey, 2025. "Limit Theorems for the Non-Convex Multispecies Curie–Weiss Model," Mathematics, MDPI, vol. 13(8), pages 1-25, April.
    • Handle: RePEc:gam:jmathe:v:13:y:2025:i:8:p:1343-:d:1638372
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    References listed on IDEAS

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    4. Alex Akwasi Opoku & Godwin Osabutey, 2018. "Multipopulation Spin Models: A View from Large Deviations Theoretic Window," Journal of Mathematics, Hindawi, vol. 2018, pages 1-13, November.
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