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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 L 4 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:
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
OSTI Identifier:
1333750
Alternate Identifier(s):
OSTI ID: 1366489