期刊
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
卷 11, 期 2, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219887814600068
关键词
Dark energy; bigravity; modified gravity
资金
- JSPS [22224003, 23540296]
- MINECO (Spain) [FIS2010-15640]
- AGAUR (Generalitat de Catalunya) [2009SGR-994]
- MES (Russia) [2.1839.2011]
- Grants-in-Aid for Scientific Research [23540296, 22224003] Funding Source: KAKEN
- ICREA Funding Source: Custom
We consider modified gravity which may describe the early-time inflation and/or late-time cosmic acceleration of the universe. In particular, we discuss the properties of F(R), F(G), string-inspired and scalar-Einstein-Gauss-Bonnet gravities, including their FRW equations and fluid or scalar-tensor description. Simplest accelerating cosmologies are investigated and possibility of unified description of the inflation with dark energy is described. The cosmological reconstruction program which permits to get the requested universe evolution from modified gravity is developed. As some extension, massive F(R) bigravity which is ghost-free theory is presented. Its scalar-tensor form turns out to be the easiest formulation. The cosmological reconstruction method for such bigravity is presented. The unified description of inflation with dark energy in F(R) bigravity turns out to be possible.
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