Dark bubbles: decorating the wall

A bstract Motivated by the difficulty of constructing de Sitter vacua in string theory, a new approach was proposed in arXiv:1807.01570 and arXiv:1907.04268 , where four dimensional de Sitter space was realized as the effective cosmology, with matter and radiation, on an expanding spherical bubble t...

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Bibliographic Details
Published in:The journal of high energy physics 2020-04, Vol.2020 (4), p.1-22, Article 85
Main Authors: Banerjee, Souvik, Danielsson, Ulf, Giri, Suvendu
Format: Article
Language:English
Subjects:
Bends
Branes
Classical and Quantum Gravitation
Cosmology
Elementary Particles
Gravitons
High energy physics
Phenomenology of Large extra dimensions
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Strings and branes phenomenology
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Summary:A bstract Motivated by the difficulty of constructing de Sitter vacua in string theory, a new approach was proposed in arXiv:1807.01570 and arXiv:1907.04268 , where four dimensional de Sitter space was realized as the effective cosmology, with matter and radiation, on an expanding spherical bubble that mediates the decay of non supersymmetric AdS 5 to a more stable AdS5 in string theory. In this third installment, we further expand on this scenario by considering the backreaction of matter in the bulk and on the brane in terms of how the brane bends. We compute the back reacted metric on the bent brane as well as in the five dimensional bulk. To further illuminate the effect of brane-bending, we compare our results with an explicit computation of the five dimensional graviton propagator using a holographic prescription. Finally we comment on a possible localization of four dimensional gravity in our model using two colliding branes.
ISSN:1029-8479
1126-6708
1029-8479
DOI:10.1007/JHEP04(2020)085