Lambda CDM epoch reconstruction from F(R, G) and modified Gauss-Bonnet gravities

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dc.contributor.author Elizalde E
dc.contributor.author Myrzakulov R
dc.contributor.author Obukhov V. V.
dc.date.accessioned 2012-06-30T13:44:16Z
dc.date.available 2012-06-30T13:44:16Z
dc.date.issued 2012-06-30
dc.identifier.uri http://repository.enu.kz/handle/123456789/1155
dc.description Dark energy cosmology is considered in a modified Gauss-Bonnet model of gravity with and without a scalar field. It is shown that these generalizations of General Relativity endow it with a very rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with the possibility to describe the transition from a decelerating to an accelerating phase explicitly. It is demonstrated here that these modified GB and scalar-GB theories are perfectly viable as cosmological models. They can describe the _CDM cosmological era without any need for a cosmological constant. Specific properties of these theories of gravity in different particular cases, such as the de Sitter one, are studied. en_US
dc.description.abstract Dark energy cosmology is considered in a modified Gauss-Bonnet model of gravity with and without a scalar field. It is shown that these generalizations of General Relativity endow it with a very rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with the possibility to describe the transition from a decelerating to an accelerating phase explicitly. It is demonstrated here that these modified GB and scalar-GB theories are perfectly viable as cosmological models. They can describe the _CDM cosmological era without any need for a cosmological constant. Specific properties of these theories of gravity in different particular cases, such as the de Sitter one, are studied. en_US
dc.language.iso en en_US
dc.relation.ispartofseries Classical and quantum gravity;Volume: 27 Issue: 9
dc.subject Hilbert-Einstein action en_US
dc.subject Gauss-Bonnet gravity en_US
dc.title Lambda CDM epoch reconstruction from F(R, G) and modified Gauss-Bonnet gravities en_US
dc.type Article en_US


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