Role of the transverse field in inverse freezing in the fermionic Ising spin-glass model

TL;DR

This paper studies how a transverse field influences inverse freezing phenomena in the fermionic Ising spin-glass model, revealing that the field significantly alters phase boundaries and reentrant behavior.

Contribution

It introduces the effect of a transverse field on inverse freezing in the fermionic Ising spin-glass model, providing new insights into phase boundary modifications.

Findings

Transverse field affects average occupation per site n.

Phase boundary and reentrant behavior are modified by the field.

Inverse freezing characteristics are sensitive to the transverse field.

Abstract

We investigate the inverse freezing in the fermionic Ising spin-glass (FISG) model in a transverse field $\Gamma$. The grand canonical potential is calculated in the static approximation, replica symmetry and one-step replica symmetry breaking Parisi scheme. It is argued that the average occupation per site $n$ is strongly affected by $\Gamma$. As consequence, the boundary phase is modified and, therefore, the reentrance associated with the inverse freezing is modified too.