Slinky evolution of domain wall brane cosmology

Invoking an initial symmetry between the time t and some extra spatial dimension y, we discuss a novel scenario where the dynamical formation of the 4 dimensional brane and its cosmological evolution are induced simultaneously by a common t[left right arrow]y symmetry breaking mechanism. The local m...

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-12, Vol.86 (12), Article 124015
Main Authors: Kadosh, Avihay, Davidson, Aharon, Pallante, Elisabetta
Format: Article
Language:English
Subjects:
Branes
Broken symmetry
Cosmological constant
Cosmology
Decay
Evolution
Scalars
Watersheds
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Summary:Invoking an initial symmetry between the time t and some extra spatial dimension y, we discuss a novel scenario where the dynamical formation of the 4 dimensional brane and its cosmological evolution are induced simultaneously by a common t[left right arrow]y symmetry breaking mechanism. The local maximum of the underlying scalar potential is mapped onto a "watershed" curve in the (t, y) plane; the direction tangent to this curve is identified as the cosmic time, whereas the perpendicular direction serves locally as the extra spatial dimension. Special attention is devoted to the so-called slinky configurations, whose brane cosmology is characterized by a decaying cosmological constant along the watershed curve. Such a slinky solution is first constructed within a simplified case where the watershed is constrained by y = 0. The physical requirements for a slinky configuration to generate a realistic model of cosmological evolution are then discussed in a more elaborated framework.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.86.124015