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Fab 5: Noncanonical kinetic gravity, self tuning, and cosmic acceleration

Title
Fab 5: Noncanonical kinetic gravity, self tuning, and cosmic acceleration
Authors
Appleby S.A.De Felice A.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2012
Journal Title
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516JCR Link
Citation
vol. 2012, no. 10
Indexed
SCIE; SCOPUS WOS scopus
Abstract
We investigate circumstances under which one can generalize Horndeski's most general scalar-tensor theory of gravity. Specifically we demonstrate that a nonlinear combination of purely kinetic gravity terms can give rise to an accelerating universe without the addition of extra propagating degrees of freedom on cosmological backgrounds, and exhibit self tuning to bring a large cosmological constant under control. This nonlinear approach leads to new properties that may be instructive for exploring the behaviors of gravity. © 2012 IOP Publishing Ltd and Sissa Medialab srl.
DOI
10.1088/1475-7516/2012/10/060
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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