English

Concentration of the complexity of spherical pure $p$-spin models at arbitrary energies

Probability 2024-06-19 v1

Abstract

We consider critical points of the spherical pure pp-spin spin glass model with Hamiltonian HN(σ)=1N(p1)/2i1,...,ip=1NJi1,...,ipσi1σipH_{N}\left(\boldsymbol{\sigma}\right)=\frac{1}{N^{\left(p-1\right)/2}}\sum_{i_{1},...,i_{p}=1}^{N}J_{i_{1},...,i_{p}}\sigma_{i_{1}}\cdots\sigma_{i_{p}}, where σ=(σ1,...,σN)SN1:={σRN:σ2=N}\boldsymbol{\sigma}=\left(\sigma_{1},...,\sigma_{N}\right)\in \mathbb{S}^{N-1}:=\left\{ \boldsymbol{\sigma}\in\mathbb{R}^{N}:\,\left\Vert \boldsymbol{\sigma}\right\Vert _{2}=\sqrt{N}\right\} and Ji1,...,ipJ_{i_{1},...,i_{p}} are i.i.d standard normal variables. Using a second moment analysis, we prove that for p32p\geq 32 and any E>EE>-E_\infty, where EE_\infty is the (normalized) ground state, the ratio of the number of critical points σ\boldsymbol{\sigma} with HN(σ)NEH_N(\boldsymbol{\sigma})\leq NE and its expectation asymptotically concentrates at 11. This extends to arbitrary EE a similar conclusion of [Sub17a].

Keywords

Cite

@article{arxiv.2109.03163,
  title  = {Concentration of the complexity of spherical pure $p$-spin models at arbitrary energies},
  author = {Eliran Subag and Ofer Zeitouni},
  journal= {arXiv preprint arXiv:2109.03163},
  year   = {2024}
}