Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1851385 | Physics Letters B | 2008 | 5 Pages |
Abstract
The Noether symmetry of a generic f(R)f(R) cosmological model is investigated by utilizing the behavior of the corresponding Lagrangian under the infinitesimal generators of the desired symmetry. We explicitly calculate the form of f(R)f(R) for which such symmetries exist. It is shown that the resulting form of f(R)f(R) yields a power law expansion for the cosmological scale factor. We also obtain the effective equation of state parameter for the corresponding cosmology and show that our model can provide a gravitational alternative to the quintessence.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Babak Vakili,