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Open Access item Accelerating cosmologies from non-local higher-derivative gravity

Authors:Capozziello, Salvatore
Elizalde, Emilio
Nojiri, Shin'ichi
Odintsov, Sergei D.
Keywords:[PACS] Higher-dimensional gravity and other theories of gravity, [PACS] Experimental tests of gravitational theories, [PACS] Cosmology, [PACS] Strings and branes, [PACS] Dark energy
Issue Date:12-Jan-2009
Publisher:Elsevier
Citation:Physics Letters B 671(1): 193-198 (2009)
Abstract:We study accelerating cosmological solutions of a general class of non-linear gravities which depend on Gauss–Bonnet and other higher derivative invariants. To achieve this goal a local formulation with auxiliary scalars for arbitrary higher-derivative non-local gravity is developed. It is demonstrated that non-local Gauss–Bonnet gravity can be reduced, in the local formulation, to a model of string-inspired scalar-Gauss–Bonnet gravity. A natural unification, in the theory here developed, of the early-time inflation epoch with a late-time acceleration stage can also be realized.
Description:6 pages.-- PACS nrs.: 04.50.+h; 04.80.Cc; 98.80.-k; 11.25.-w; 95.36.+x.-- ArXiv pre-print available at: http://arxiv.org/abs/0809.1535
Publisher version (URL):http://dx.doi.org/10.1016/j.physletb.2008.11.060
URI:http://hdl.handle.net/10261/10754
ISSN:0370-2693
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