Title : ( Palatini f(R) cosmology and Noether symmetry )
Authors: Mahmood Roshan , Fatimah Shojai ,Access to full-text not allowed by authors
Abstract
We study Palatini f (R) cosmology using Noether symmetry approach for the matter-dominated universe. In order to construct a point-like Lagrangian in the flat FRW space–time, we use the dynamical equivalence between f (R) gravity and scalar–tensor theories. The existence of Noether symmetry of the cosmological f (R) Lagrangian helps us to find out the form of f (R) and the exact solutions for cosmic scale factor. We show that this symmetry always exist for f (R) ∼ Rn and the Noether constant is a function of the Newton’s gravitational constant and the current matter content of the universe.
Keywords
, Noether symmetry approach, Palatini gravity@article{paperid:1033788,
author = {Roshan, Mahmood and Fatimah Shojai},
title = {Palatini f(R) cosmology and Noether symmetry},
journal = {Physics Letters B},
year = {2008},
volume = {668},
number = {3},
month = {October},
issn = {0370-2693},
pages = {238--240},
numpages = {2},
keywords = {Noether symmetry approach; Palatini gravity},
}
%0 Journal Article
%T Palatini f(R) cosmology and Noether symmetry
%A Roshan, Mahmood
%A Fatimah Shojai
%J Physics Letters B
%@ 0370-2693
%D 2008