UNIVERSE EVOLUTION IN THE EINSTEIN FRAME OF JORDAN–BRANS–DICKE THEORY

Authors

  • E. V. Chubaryan Chair of Theoretical Physics, YSU, Armenia
  • R. M. Avakyan Chair of Theoretical Physics, YSU, Armenia
  • G. G. Harutyunyan Chair of Theoretical Physics, YSU, Armenia
  • A. S. Piloyan Chair of Theoretical Physics, YSU, Armenia

DOI:

https://doi.org/10.46991/PYSU:A/2010.44.2.049

Keywords:

relativity and gravitation, dark energy, observational cosmology, cosmological constant

Abstract

Cosmological models of the Universe in the framework of Jordan–Brans– Dicke theory in the Einstein frame in the case of scalar field domination as well as in the presence of cosmological constant $\wedge$ with matter, which is described by barometric equation of state $P=\alpha \epsilon$ ( $P$ is the pressure, $\epsilon$ is the energy density of matter), are considered. The analysis of obtained results in the light of observational data are done. It is shown that the contribution of the scalar field and $\wedge$-member ( $\wedge>0$ ) in the case of $q=-1/2$ ($q$ is the “decelerating” parameter) compensate each other. In addition, the situation leads to Einstein’s theory.

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Published

2010-04-26

How to Cite

Chubaryan, E. V., Avakyan, R. M., Harutyunyan, G. G., & Piloyan, A. S. (2010). UNIVERSE EVOLUTION IN THE EINSTEIN FRAME OF JORDAN–BRANS–DICKE THEORY. Proceedings of the YSU A: Physical and Mathematical Sciences, 44(2 (222), 49–54. https://doi.org/10.46991/PYSU:A/2010.44.2.049

Issue

Section

Physics