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This content will become publicly available on November 26, 2016

Title: Fully stable cosmological solutions with a non-singular classical bounce

Recently, we showed how it is possible to use a cubic Galileon action to construct classical cosmological solutions that enter a contracting null energy condition (NEC) violating phase, bounce at finite values of the scale factor and exit into an expanding NEC-satisfying phase without encountering any singularities or pathologies. One drawback of these examples is that singular behavior is encountered at some time either just before or just after the NEC-violating phase. In this Letter, we show that it is possible to circumvent this problem by extending our method to actions that include the next order L4 Galileon interaction. In using this approach, we construct non-singular classical bouncing cosmological solutions that are non-pathological for all times.
Authors:
 [1] ;  [2]
  1. Princeton Univ., NJ (United States). Princeton Center for Theoretical Science
  2. Princeton Univ., NJ (United States). Princeton Center for Theoretical Science and Dept. of Physics
Publication Date:
OSTI Identifier:
1333750
Grant/Contract Number:
FG02-91ER40671
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 764; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Princeton Univ., NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Bouncing cosmology; Non-singular bounce; Galileon; Ghost instability; Gradient instability