Radiative Effects in Gauge Models with Homogeneous Condensate and Curved Space-Time

TL;DR

This paper investigates the quantum effects of nonabelian condensates in curved space-time, calculating the effective action, free energy, and photon polarization operator in various gauge models, including gluodynamics and QCD.

Contribution

It provides new one-loop calculations of effective actions and polarization operators in curved space for nonabelian gauge models, extending previous flat-space analyses.

Findings

Effective action in gluodynamics in curved space is derived.

Free energy and its minimum are analyzed in a (2+1)-dimensional QCD model.

Photon polarization operator is explicitly calculated.

Abstract

Different models with nonabelian homogeneous condensate fields are considered in the one-loop approximation. Effective action in a model of gluodynamics in curved space is calculated. Free energy and its minimum in a (2+1)-dimensional model of QCD are investigated. Photon polarization operator (PO) is obtained.