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Spin glass to paramagnetic transition and triple point in...
Iain M. Johnstone, Yegor Klochkov, Alexei Onatski, Damian Pavlys · 2021-04-16 · via math.PR updates on arXiv.org

This paper studies spin glass to paramagnetic transition in the Spherical Sherrington-Kirkpatrick model with ferromagnetic Curie-Weiss interaction with coupling constant $J$ and inverse temperature $β$. The disorder of the system is represented by a general Wigner matrix. We confirm a conjecture of \cite{Baik2016} and \cite{Baik2017}, that the critical window of temperatures for this transition is $β= 1 + bN^{-1/3} \sqrt{\log N}$ with $b\in\mathbb{R}$. The limiting distribution of the scaled free energy is Gaussian for negative $b$ and a weighted linear combination of independent Gaussian and Tracy-Widom components for positive $b$. In the special case where the Wigner matrix is from the Gaussian Orthogonal or Unitary Ensemble, we describe the triple point transition between spin glass, paramagnetic, and ferromagnetic regimes in a critical window for $(β, J)$ around the triple point $(1,1)$: the Tracy-Widom component is replaced by the one parameter family of deformations described by Bloemendal and Virag, \cite{BloVirI}.