Some aspects of the cosmological conformal equivalence between ``Jordan Frame'' and ``Einstein Frame''

Details Some aspects of the cosmological conformal equivalence between ``Jordan Frame'' and ``Einstein Frame'' Some aspects of the cosmological conformal equivalence between ``Jordan Frame'' and ``Einstein Frame''

1996-12-18

arxiv.org/abs/gr-qc/9612053v1

Class.Quant.Grav.14:3243-3258,1997

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages, latex, submitted to Class. Quantum Grav

Scientific paper

10.1088/0264-9381/14/12/010

The conformal equivalence between Jordan frame and Einstein frame can be used in order to search for exact solutions in general theories of gravity in which scalar fields are minimally or nonminimally coupled with geometry. In the cosmological arena a relevant role is played by the time parameter in which dynamics is described. In this paper we discuss such issues considering also if cosmological Noether symmetries in the ``point--like'' Lagrangian are conformally preserved. Through this analysis and through also a careful analysis of the cosmological parameters \Omega and \Lambda, it is possible to contribute to the discussion on which is the physical system.

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