Spin-glass model with partially annealed asymmetric bonds

TL;DR

This paper analyzes a spherical spin-glass model with asymmetric bonds that interact with a separate thermostat, revealing a first-order phase transition to a spin-glass phase influenced by bond temperature.

Contribution

It introduces a mean-field spin-glass model with partially annealed asymmetric bonds and demonstrates the existence of a spin-glass phase under nonrelaxational dynamics.

Findings

First-order phase transition to spin-glass phase occurs when bonds are frozen.

Transition temperature approaches zero as bond thermostat temperature increases.

Spin-glass phase can exist with nonrelaxational dynamics in mean-field models.

Abstract

We have considered the two-spin interaction spherical spin-glass model with asymmetric bonds (coupling constants). Besides the usual interactions between spins and bonds and between the spins and a thermostat with temperature $T_{\sigma}$ there is also an additional factor: the bonds are not assumed random {\it a priori} but interact with some other thermostat at the temperature $T_{J}$. We show that when the bonds are frozen with respect to the spins a first order phase transition to a spin-glass phase occurs, and the temperature of this transition tends to zero if $T_J$ is large. Our analytical results show that a spin-glass phase can exist in mean-field models with nonrelaxational dynamics.