Table of Contents
Journal of Astrophysics
Volume 2013, Article ID 590171, 12 pages
http://dx.doi.org/10.1155/2013/590171
Research Article

Field Independent Cosmic Evolution

1Department of Physics, University of Kalyani, Nadia 741235, India
2Department of Physics, Jangipur College, Murshidabad 742213, India

Received 26 April 2013; Accepted 3 September 2013

Academic Editors: M. Biesiada, K. Bolejko, G. Chincarini, M. S. Dimitrijevic, D. Mota, and E. Saridakis

Copyright © 2013 Nayem Sk and Abhik Kumar Sanyal. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

It has been shown earlier that Noether symmetry does not admit a form of corresponding to an action in which is coupled to scalar-tensor theory of gravity or even for pure theory of gravity taking anisotropic model into account. Here, we prove that theory of gravity does not admit Noether symmetry even if it is coupled to tachyonic field and considering a gauge in addition. To handle such a theory, a general conserved current has been constructed under a condition which decouples higher-order curvature part from the field part. This condition, in principle, solves for the scale-factor independently. Thus, cosmological evolution remains independent of the form of the chosen field, whether it is a scalar or a tachyon.