30 September 2015 to 3 October 2015
Yerevan, Armenia
Etc/GMT+4 timezone

Late stage of the Universe evolution taking into account the vacuum effects

1 Oct 2015, 14:56
38m
Small Hall, Guesthouse ()

Small Hall, Guesthouse

Speaker

Anna Kotanjyan (Yerevan State University)

Description

The investigations of quantum vacuum effects indicate that in the phenomenology they are responsible for the existence of the cosmological constant $\Lambda$, and besides in the early de Sitter model one has $\Lambda\sim H^4$ ($H$- is the Hubble parameter), whereas for the vacuum energy induced by QCD condensate at late times $\Lambda\sim H$. In the present work, on the base of the modified Jordan theory, we consider models of the expanding Universe with a cosmological scalar $\varphi (y)=\alpha H^{2}$. For different values of the coupling constants $\xi$ the values of the parameter $\alpha$ are obtained corresponding to an accelerated expansion.

Primary author

Anna Kotanjyan (Yerevan State University)

Co-authors

Prof. Edvard Chubaryan (Yerevan State University) Prof. Gohar Harutyunyan (Yerevan State University) Prof. Roland Avagyan (Yerevan State University) Prof. Sergey Sushkov (Kazan Federal University)

Presentation Materials

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