Conformal analogs of the Jordan-Brans-Dicke theory. I. |
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Authors: | R M Avagyan G H Harutunyan A V Hovsepyan |
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Institution: | 1.Academician G. S. Saakyan Department of Theoretical Physics,Erevan State University,Erevan,Armenia |
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Abstract: | Recent cosmological observations of large-scale structures (red shift of type Ia supernovae) confirm that the universe is
currently expanding at an accelerating rate and its dominant component is dark energy. This has stimulated the development
of the theory of gravity and led to many alternative variants, including tensor-scalar ones. This paper deals with the role
of conformal transformations in the Jordan-Brans-Dicke theory. Variants of intrinsic, conformally coupled, and Einstein representations
are examined. In the Einstein representation an exact analytic solution for the standard cosmological model is obtained. It
is expressed in terms of the relative energy contributions of ordinary matter Ω
m
, the scalar field Ω
CK
, and a term ΩΛ related to the cosmological constant Λ . Information on the evolution of the universe for the case with a minimally coupled
scalar field is given in the form of graphs. |
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Keywords: | |
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