Probing marginal stability in the spherical p = 2 model

In this paper, we investigate the marginally stable nature of the low-temperature trivial spin-glass phase in spherical p = 2 spin glass by perturbing the system with three different kinds of non-linear interactions. In particular, we compare the effect of three additional dense four-body interactio...

Full description

Saved in:
Bibliographic Details
Published in:Journal of statistical mechanics 2024-11, Vol.2024 (11), p.113301
Main Authors: Niedda, Jacopo, Tonolo, Tommaso, Gradenigo, Giacomo
Format: Article
Language:English
Subjects:
cavity and replica method
critical behaviour of disordered systems
ergodicity breaking
spin glasses
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we investigate the marginally stable nature of the low-temperature trivial spin-glass phase in spherical p = 2 spin glass by perturbing the system with three different kinds of non-linear interactions. In particular, we compare the effect of three additional dense four-body interactions, namely ferromagnetic couplings, purely disordered couplings and couplings with competing disordered and ferromagnetic interactions. Our study, characterized by the effort to present in a clear and pedagogical way the derivation of all the results, shows that the marginal stability property of the spherical spin glass depends in fact on which kind of perturbation is applied to the system. In general, a certain degree of frustration is needed in the additional terms in order to induce a transition from a trivial to a non-trivial spin-glass phase. On the other hand, the addition of generic non-frustrated interactions does not destabilize the trivial spin-glass phase.
ISSN:1742-5468
1742-5468
DOI:10.1088/1742-5468/ad890c