Induced cosmological constant and other features of asymmetric brane embedding

Shtanov, Yuri ; Sahni, Varun ; Shafieloo, Arman ; Toporensky, Alexey (2009) Induced cosmological constant and other features of asymmetric brane embedding Journal of Cosmology and Astroparticle Physics, 2009 . 023_1-023_16. ISSN 1475-7516

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Official URL: http://iopscience.iop.org/1475-7516/2009/04/023

Related URL: http://dx.doi.org/10.1088/1475-7516/2009/04/023

Abstract

We investigate the cosmological properties of an 'induced gravity' brane scenario in the absence of mirror symmetry with respect to the brane. We find that brane evolution can proceed along one of four distinct branches. By contrast, when mirror symmetry is imposed, only two branches exist, one of which represents the self-accelerating brane, while the other is the so-called normal branch. This model incorporates many of the well-known possibilities of brane cosmology including phantom acceleration (w<−1), self-acceleration, transient acceleration, quiescent singularities, and cosmic mimicry. Significantly, the absence of mirror symmetry also provides an interesting way of inducing a sufficiently small cosmological constant on the brane. A small (positive) Λ-term in this case is induced by a small asymmetry in the values of bulk fundamental constants on the two sides of the brane.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:Cosmology with Extra Dimensions; Cosmological Applications of Theories with Extra Dimensions; Extra Dimensions; Dark Energy Theory
ID Code:46257
Deposited On:04 Jul 2011 11:14
Last Modified:04 Jul 2011 11:14

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