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Cited by 160

The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.

Cosmological super-bounce

Open access
Koehn, Michael, Lehners, Jean-Luc, Ovrut, Burt A.·2014·Physical Review D
DOI 10.1103/physrevd.90.025005
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Abstract

We study a model for a nonsingular cosmic bounce in $\mathcal{N}=1$ supergravity, based on supergravity versions of the ghost condensate and cubic Galileon scalar field theories. The bounce is preceded by an ekpyrotic contracting phase, which prevents the growth of anisotropies in the approach to the bounce and allows for the generation of scale-invariant density perturbations that carry over into the expanding phase of the Universe. We present the conditions required for the bounce to be free of ghost excitations, as well as the tunings that are necessary in order for the model to be in agreement with cosmological observations. All of these conditions can be met. Our model thus provides a proof-of-principle that nonsingular bounces are viable in supergravity, despite the fact that during the bounce the null energy condition is violated.

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Metadata

Authors
Koehn, M., Lehners, J.-L., & Ovrut, B. A.
Venue
Physical Review D
Publisher
American Physical Society (APS)
Published
2014-07-03
Volume
90
Issue
2
ISSN
  • 0556-2821 (ISSN-L)
  • 1550-7998
  • 1550-2368
DOI
10.1103/physrevd.90.025005
OpenAlex
W2097742914
Cited by
160
References
8
FWCI
13.28
Type
journal article
Language
en
Open access
green

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