No naked singularities in homogeneous, spherically symmetric bubble spacetimes?

TL;DR

This study uses numerical simulations to investigate the evolution of bubble spacetimes, providing evidence against the formation of naked singularities and showing how gauge fields influence bubble dynamics.

Contribution

It demonstrates that naked singularities do not form in homogeneous, spherically symmetric bubble spacetimes under various conditions, and explores the effects of gauge fields on bubble behavior.

Findings

No naked singularities form in studied scenarios.

Strong gauge fields cause collapsing bubbles to bounce and expand.

Fine-tuning gauge fields approaches static bubble solutions.

Abstract

We study the evolution of bubble spacetimes in vacuum and electrovac scenarios by numerical means. We find strong evidence against the formation of naked singularities in (i) scenarios with negative masses displaying initially collapsing conditions and (ii) scenarios with negative masses displaying initially expanding conditions, previously reported to give rise to such singularities. Additionally, we show that the presence of strong gauge fields implies that an initially collapsing bubble bounces back and expands. By fine-tuning the strength of the gauge field we find that the solution approaches a static bubble solution.