ЖЭТФ, Том 150,
стр. 705 (Октябрь 2016)
(Английский перевод - JETP,
Vol. 123, No 4,
доступен on-line на www.springer.com
Dark-energy cosmological models in f(G) gravity
Поступила в редакцию: 15 Апреля 2016
We discuss dark-energy cosmological models in f(G) gravity. For this purpose, a locally rotationally symmetric Bianchi type I cosmological model is considered. First, exact solutions with a well-known form of the f(G) model are explored. One general solution is discussed using a power-law f(G) gravity model and physical quantities are calculated. In particular, Kasner's universe is recovered and the corresponding f(G) gravity models are reported. Second, the energy conditions for the model under consideration are discussed using graphical analysis. It is concluded that solutions with f(G)=G5/6 support expansion of universe while those with f(G)=G1/2 do not favor the current expansion.