Bad News on the Brane
A.J.M. Medved (University of Alberta)

TL;DR
This paper explores brane-world cosmologies in anti-de Sitter black hole backgrounds, revealing that charge-induced bounce universes are not physically viable under holographic considerations, challenging certain speculative models of the universe.
Contribution
It extends brane-world models to charged black hole backgrounds and analyzes their physical viability from a holographic perspective, highlighting the importance of charge censorship.
Findings
Small bulk charge can create a bounce universe without singularities.
Charge-induced bounce cosmologies are not physically viable holographically.
Bulk charge must be censored to maintain physical consistency.
Abstract
There has been substantial interest in obtaining a quantum-gravitational description of de Sitter space. However, any such attempts have encountered formidable obstacles, and new philosophical directions may be in order. One possibility, although somewhat speculative, would be to view the physical universe as a timelike hypersurface evolving in a higher-dimensional bulk spacetime; that is, the renowned brane-world scenario. In this paper, we extend some recent studies along this line, and consider a non-critical 3-brane moving in the background of an anti-de Sitter Reissner-Nordstrom-like black hole. Interestingly, even an arbitrarily small electrostatic charge in the bulk can induce a singularity-free ``bounce'' universe on the brane, whereas a vanishing charge typically implies a singular cosmology. However, under closer examination, from a holographic (dS/CFT) perspective, we…
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Noncommutative and Quantum Gravity Theories
