Wormholes and Cosmic Strings

TL;DR

This paper proposes a gravitational model where symmetry invariance leads to the formation of topological defects like cosmic strings, highlighting a novel mechanism involving wormholes and symmetry breaking.

Contribution

It introduces a new gravitational framework with invariant Euclidean action under local transformations, enabling spontaneous symmetry breaking and the formation of cosmic strings via wormholes.

Findings

Model allows spontaneous symmetry breaking including diffeomorphism invariance.

Predicts formation of cosmic strings through wormhole-induced processes.

Provides a theoretical basis for topological defect formation in quantum gravity.

Abstract

A gravitational scenario is proposed where the euclidean action is invariant under the isotropic and homogeneous version of the euclidean {\it U(1)} group of local transformations of the scale factor and scalar matter field, interpreting the the trace of the second fundamental form as the gauge field. The model allows spontaneous breakdown of some involved symmetries, including possibly diffeomorphism invariance, and leads to the formation of topologiocal deffects. In particular, we consider here the case of the wormhole-induced formation of cosmic strings. (To appear in the Proceedings of the International Workshop on "Quantum Systems: New Trends and Methods", World Scientific)