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Anisotropy in a non-singular bounce.
- Source :
- Classical & Quantum Gravity; 4/7/2013, Vol. 30 Issue 7, Special section p1-20, 20p
- Publication Year :
- 2013
-
Abstract
- Following recent claims relative to the question of large anisotropy production in regular bouncing scenarios, we study the evolution of such anisotropies in a model where an ekpyrotic phase of contraction is followed by domination of a Galileon-type Lagrangian which generates a non-singular bounce. We show that the anisotropies decrease during the phase of ekpyrotic contraction (as expected) and that they can be constrained to remain small during the non-singular bounce phase (a non-trivial result). Specifically,we derive the e-folding number of the phase of ekpyrotic contraction which leads to a present-day anisotropy in agreement with current observational bounds. [ABSTRACT FROM AUTHOR]
- Subjects :
- ANISOTROPY
LAGRANGIAN mechanics
METAPHYSICAL cosmology
METAPHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 02649381
- Volume :
- 30
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Classical & Quantum Gravity
- Publication Type :
- Academic Journal
- Accession number :
- 86700159
- Full Text :
- https://doi.org/10.1088/0264-9381/30/7/075019