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Closed Access item Covariant renormalizable gravity and its FRW cosmology

Authors:Nojiri, Shin'ichi
Odintsov, Sergei D.
Issue Date:15-Feb-2010
Publisher:American Physical Society
Citation:Physical Review - Section D - Particles and Fields 81 (4) : 043001 (2010)
Abstract:We consider the diffeomorphism invariant gravity coupled with the ideal fluid in the non-standard way. The Lorentz-invariance of the graviton propagator in such a theory considered as perturbation over flat background turns out to be broken due to non-standard coupling with the ideal fluid. As a result the behavior of the propagator in the ultraviolet/infrared region indicates that some versions of such theory are (super-)renormalizable ones (with appearance of only physical transverse modes). The FRW cosmology in same cases may be different from the one in General Relativity with the possible quintessence/phantom-like inflationary stage.
Description:Publicado en línea el 1 de febrero de 2010.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.81.043001
URI:http://hdl.handle.net/10261/38126
ISSN:0556-2821
E-ISSNmetadata.dc.identifier.doi = DOI:1089-4918
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Appears in Collections:(ICE) Artículos

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