Field Independent Cosmic Evolution. (21st October 2013)

• Record Type: Journal Article
• Authors: Sk, Nayem; Kumar Sanyal, Abhik
• Other Names: Biesiada M. Academic Editor.; Bolejko K. Academic Editor.; Chincarini G. Academic Editor.; Dimitrijevic M. S. Academic Editor.; Mota D. Academic Editor.; Saridakis E. Academic Editor.
• Is Part Of: Journal of astrophysics. Volume 2013(2013)
• Publication Date: 2013-10-21
• Subjects: Astrophysics -- Periodicals; Astrophysics; Periodicals; 523.01
• DOI: 10.1155/2013/590171
• Languages: English
• ISSNs: 2356-718X

Abstract

Abstract : It has been shown earlier that Noether symmetry does not admit a form ofF ( R ) corresponding to an action in whichF ( R ) is coupled to scalar-tensor theory of gravity or even for pureF ( R ) theory of gravity taking anisotropic model into account. Here, we prove thatF ( R ) 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.