Cosmic String Created from Vacuum Fluctuaions

TL;DR

This paper investigates the theoretical possibility that vacuum fluctuations of quantum fields can generate cosmic strings within a semiclassical gravity framework, using approximate methods to solve Einstein's equations.

Contribution

It introduces a novel approach to modeling cosmic string formation from vacuum fluctuations using approximate solutions in static cylindrically symmetric spacetimes.

Findings

Derived solutions for Einstein equations under various boundary conditions.

Showed vacuum fluctuations can lead to configurations resembling cosmic strings.

Provided insights into quantum field effects in curved spacetime.

Abstract

The possibility of the cosmic string creation by the vacuum fluctuations of quantum fields in the self-consistent semiclassical theory of gravity is discussed. We use the approximate method for obtaining vacuum expectation value of the renormalized stress-energy tensor of conformally invariant quantum fields in static cylindrically symmetric spacetimes. We have obtained the particular solutions of Einstein equations for the different boundary conditions at the cylinder symmetry axis.