CORRESPONDENCE BETWEEN MODIFIED GRAVITY AND 5D RICCI-FLAT COSMOLOGIES
نویسندگان
چکیده
منابع مشابه
Self-similar cosmologies in 5D: spatially flat anisotropic models
In the context of theories of Kaluza-Klein type, with a large extra dimension, we study self-similar cosmological models in 5D that are homogeneous, anisotropic and spatially flat. The “ladder” to go between the physics in 5D and 4D is provided by Campbell-Maagard’s embedding theorems. We show that the 5-dimensional field equations RAB = 0 determine the form of the similarity variable. There ar...
متن کاملUniverse Evolution in a 5d Ricci-flat Cosmology
We use Wetterich’s parameterization equation of state (EOS) of dark energy to a 5D Ricci-flat cosmological solution and we suppose the universe contains three major components: matter, radiation and dark energy. By using the relation between the scale factor and the redshift z, we show that the two arbitrary functions contained in the 5D solution could be solved out analytically in terms of the...
متن کاملHomogeneous cosmologies in generalized modified gravity
Dynamical system methods are used in the study of the stability of spatially flat homogeneous cosmologies within a large class of generalized modified gravity models in the presence of a relativistic matter-radiation fluid. The present approach can be considered as the generalization of previous works in which only F (R) cases were considered. Models described by an arbitrary function of all po...
متن کاملRicci Flat Black Holes and Hawking-Page Phase Transition in Gauss-Bonnet Gravity and Dilaton Gravity
It is well-known that there exists a Hawking-Page phase transition between a spherical AdS black hole and a thermal AdS space. The phase transition does not happen between a Ricci flat AdS black hole whose horizon is a Ricci flat space and a thermal AdS space in the Poincare coordinates. However, the Hawking-Page phase transition occurs between a Ricci flat AdS black hole and an AdS soliton if ...
متن کاملAn accelerating universe in a 5D non compact and non Ricci flat Kaluza-Klein Cosmology
In the framework of noncompact Kaluza-Klein theory, we investigate a (4 + 1)dimensional universe consisting of a (4 + 1) dimensional Robertson-Walker type metric subject to a (4 + 1) dimensional energy-momentum tensor.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2009
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271809014923