Induced cosmological constant and other features of asymmetric brane embedding
- Bogolyubov Institute for Theoretical Physics, Kiev 03680 (Ukraine)
- Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007 (India)
- Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3RH (United Kingdom)
- Sternberg Astronomical Institute, Moscow State University, Universitetsky Prospekt 13, Moscow 119992 (Russian Federation)
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) {Lambda}-term in this case is induced by a small asymmetry in the values of bulk fundamental constants on the two sides of the brane.
- OSTI ID:
- 22156973
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 04; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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