Vacuum Polarization by a Magnetic Flux in a Cosmic String Background

TL;DR

This paper investigates how a magnetic flux confined in a cylindrical tube affects vacuum polarization of massless fermions in a cosmic string background, considering three different magnetic field configurations.

Contribution

It introduces a detailed analysis of vacuum polarization effects caused by magnetic flux in a cosmic string setting with three distinct magnetic field configurations.

Findings

Magnetic flux influences vacuum polarization in cosmic string backgrounds.

Different magnetic field configurations produce varying polarization effects.

The study enhances understanding of quantum field behavior in topologically non-trivial spacetimes.

Abstract

In this paper we analyse the vacuum polarization effects due to a magnetic flux on massless fermionic fields in a cosmic string background. Three distinct configurations of magnetic fields are considered. In all of them the magnetic fluxes are confined in a long cylindrical tube of finite radius.