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)
