Geodesic
Universe evolution in the Einstein frame of Jordan–Brans–Dicke theory
Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2010), pp. 49-54 
E. V. Chubaryan; R. M. Avakyan; G. H. Harutyunyan; A. S. Piloyan. Universe evolution in the Einstein frame of Jordan–Brans–Dicke theory. Proceedings of the Yerevan State University. Physical and mathematical sciences, no. 2 (2010), pp. 49-54. http://geodesic.mathdoc.fr/item/UZERU_2010_2_a7/
@article{UZERU_2010_2_a7,
     author = {E. V. Chubaryan and R. M. Avakyan and G. H. Harutyunyan and A. S. Piloyan},
     title = {Universe evolution in the {Einstein} frame of {Jordan{\textendash}Brans{\textendash}Dicke} theory},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {49--54},
     year = {2010},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2010_2_a7/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

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 $\Lambda$ with matter, which is described by barometric equation of state $P=\alpha\varepsilon$ ($P$ is the pressure, $\varepsilon$ 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 $\Lambda$-member ($\Lambda>0$ ) 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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