Accelerating cosmologies from non-local higher-derivative gravity |
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| Authors: | Salvatore Capozziello Emilio Elizalde Shin'ichi Nojiri Sergei D. Odintsov |
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| Affiliation: | 1. Dipartimento di Scienze Fisiche, Università di Napoli “Federico II”, INFN Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126 Napoli, Italy;2. Consejo Superior de Investigaciones Científicas ICE/CSIC-IEEC, Campus UAB, Facultat de Ciències, Torre C5-Parell-2a pl, E-08193 Bellaterra (Barcelona), Spain;3. Department of Physics, Nagoya University, Nagoya 464-8602, Japan;4. Institució Catalana de Recerca i Estudis Avançats (ICREA) and Institut de Ciències de l''Espai (IEEC-CSIC), Campus UAB, Facultat de Ciències, Torre C5-Par-2a pl, E-08193 Bellaterra (Barcelona), Spain |
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| 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. |
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| Keywords: | 04.50.+h 04.80.Cc 98.80.-k 11.25.-w 95.36.+x |
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