English

Spherical Sherrington-Kirkpatrick model for deformed Wigner matrix with fast decaying edges

Probability 2022-10-13 v2

Abstract

We consider the 22-spin spherical Sherrington--Kirkpatrick model whose disorder is given by a deformed Wigner matrix of the form W+λVW+\lambda V, where WW is a Wigner matrix and VV is a random diagonal matrix with i.i.d. entries. Assuming that the density function of the entries of VV decays faster than a certain rate near the edges of its spectrum, we prove the sharp phase transition of the limiting free energy and its fluctuation. In the high temperature regime, the fluctuation of FNF_N converges in distribution to a Gaussian distribution, whereas it converges to a Weibull distribution in the low temperature regime. We also prove several results for deformed Wigner matrices, including a local law for the resolvent entries, a central limit theorem of the linear spectral statistics, and a theorem on the rigidity of eigenvalues.

Keywords

Cite

@article{arxiv.2112.14107,
  title  = {Spherical Sherrington-Kirkpatrick model for deformed Wigner matrix with fast decaying edges},
  author = {Ji Oon Lee and Yiting Li},
  journal= {arXiv preprint arXiv:2112.14107},
  year   = {2022}
}