Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-05-04
JCAP 1011:008,2010
Physics
High Energy Physics
High Energy Physics - Theory
38 pages, 6 figures. V2: Added: a word to the title, clarifications, an appendix, many references. To appear in JCAP
Scientific paper
10.1088/1475-7516/2010/11/008
One of the greatest problems of standard cosmology is the Big Bang singularity. Previously it has been shown that non-local ghostfree higher-derivative modifications of Einstein gravity in the ultra-violet regime can admit non-singular bouncing solutions. In this paper we study in more details the dynamical properties of the equations of motion for these theories of gravity in presence of positive and negative cosmological constants and radiation. We find stable inflationary attractor solutions in the presence of a positive cosmological constant which renders inflation {\it geodesically complete}, while in the presence of a negative cosmological constant a cyclic universe emerges. We also provide an algorithm for tracking the super-Hubble perturbations during the bounce and show that the bouncing solutions are free from any perturbative instability.
Biswas Tirthabir
Koivisto Tomi
Mazumdar Anupam
No associations
LandOfFree
Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-532601