In:
International Journal of Geometric Methods in Modern Physics, World Scientific Pub Co Pte Ltd, Vol. 05, No. 03 ( 2008-05), p. 329-337
Abstract:
This paper studies the cosmological equations for a scalar field φ in the framework of a quantum gravity modified Einstein–Hilbert Lagrangian where G and Λ are dynamical variables. It is possible to show that there exists a Noether symmetry for the point Lagrangian describing this scheme in a FRW universe. Our main result is that the Noether Symmetry Approach fixes both Λ = Λ(G) and the potential V = V(φ) of the scalar field. The method does not lead, however, to easily solvable equations, by virtue of the higher dimensionality of the reduced configuration space involved, the additional variable being the running Newton coupling.
Type of Medium:
Online Resource
ISSN:
0219-8878
,
1793-6977
DOI:
10.1142/S0219887808002801
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2008
SSG:
17,1
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