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Anisotropy in a non-singular bounce.

Authors :
Cai, Yi-Fu
Brandenberger, Robert
Peter, Patrick
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]

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