Gravitational waves in dark bubble cosmology
Ulf Danielsson, Daniel Panizo, Rob Tielemans
TL;DR
This paper develops a 5D model of gravitational waves in dark bubble cosmology, linking brane world scenarios with quantum cosmology and clarifying energy contributions in the Einstein equations.
Contribution
It introduces a 5D uplift of 4D gravitational waves in de Sitter space, extending the dark bubble and quantum cosmology connection to include gravitational perturbations.
Findings
Successfully constructs the 5D uplift of 4D gravitational waves.
Provides a new interpretation of negative energy contributions.
Differentiates dark bubble scenario from Randall-Sundrum model.
Abstract
In this paper we construct the 5D uplift of 4D gravitational waves in de Sitter cosmology for the brane world scenario based on a nucleated bubble in AdS5. This makes it possible to generalize the connection between the dark bubbles and Vilenkin's quantum cosmology to include gravitational perturbations. We also use the uplift to explain the interpretation of the apparently negative energy contributions in the 4D Einstein equations, which distinguish the dark bubble scenario from Randall-Sundrum.
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