Symmetry breaking patterns for two coupled complex scalar fields at finite temperature and in an external magnetic field

TL;DR

This paper investigates how two coupled complex scalar fields behave under finite temperature and magnetic fields, revealing phenomena like inverse symmetry breaking and symmetry nonrestoration using advanced nonperturbative methods.

Contribution

It introduces a nonperturbative analysis of coupled scalar fields at finite temperature and magnetic field, highlighting novel symmetry breaking phenomena.

Findings

Observation of inverse symmetry breaking.

Identification of symmetry nonrestoration.

Comparison between nonperturbative and perturbative results.

Abstract

A model of two coupled complex scalar fields is studied at finite temperature and under an external magnetic field. The results are obtained in the context of the nonperturbative method of the optimized perturbation theory and contrasted with those obtained in perturbation theory and in the one-loop approximation. The emergence of phenomena related to inverse symmetry breaking and symmetry nonrestoration are analyzed.