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Title of Journal: Int J Theor Phys

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Abbravation: International Journal of Theoretical Physics

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Springer US

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10.1007/bf00790822

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1572-9575

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Classification of Cosmic Scale Factor via Noether

Authors: Adil Jhangeer M Farasat Shamir Tayyaba Naz Nazish Iftikhar
Publish Date: 2014/12/18
Volume: 54, Issue: 7, Pages: 2343-2353
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Abstract

In this paper a complete classification of FriedmannRobertsonWalker FRW spacetime by using approximate Noether approach is presented Considered spacetime is discussed for three different types of universe ie flat open and closed Different forms of cosmic scale factor a with respect to the nature of the universe which posses the nontrivial Noether gauge symmetries NGS are reported The perturbed Lagrangian corresponding to FRW metric in the Noether equation is used to get Noether operators For different types of universe minimal and maximal set of Noether operators are reported A list of Noether operators is also computed which is not only independent from the choice of the cosmic scale factor but also from the type of universe Further corresponding energy type first integral of motions are also calculated

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