LQG inspired spacetimes as solutions of the Einstein equations

TL;DR

This paper explores how black bounce spacetimes, inspired by loop quantum gravity, can be realized as solutions to Einstein's equations with specific exotic matter sources, shedding light on their physical plausibility.

Contribution

It demonstrates that black bounce models inspired by loop quantum gravity can be derived as solutions of Einstein's equations using combined phantom scalar and nonlinear electrodynamics sources.

Findings

Sources are a combination of phantom scalar field and nonlinear electrodynamics.

Energy condition analysis identifies which fields violate classical energy conditions.

Black bounce solutions can be generated within standard general relativity with exotic matter.

Abstract

Black bounces are compact objects with a wormhole structure hidden behind an event horizon. This type of metric can be obtained through general relativity by considering the presence of exotic matter. Such spacetimes can also arise within the framework of effective theories inspired by loop quantum gravity. In this work, we verify the possibility of obtaining black bounce models inspired by loop quantum gravity as solutions of general relativity. For this, we examine which sources can generate these solutions and the consequences of using these types of sources. We find that the sources can be expressed as a combination of a phantom scalar field and nonlinear electrodynamics. Once we obtain the sources in terms of fields, we analyze the energy conditions for each field separately to verify which of the fields is responsible for the violation of the energy conditions.