Accelerated expansion of the Universe driven by G-essence

In the present work we analyze the g-essence model for the particular Lagrangian: \(L=R+2[\alpha X^n+\epsilon Y-V(\psi,\bar{\psi})]\). The g-essence models were proposed recently as an alternative and as a generalization to the scalar k-essence. We have presented the 3 types solutions of the g-essen...

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Bibliographic Details
Published in:arXiv.org 2010-12
Main Authors: Yerzhanov, K K, P Yu Tsyba, Myrzakul, Sh R, Kulnazarov, I I, Myrzakulov, R
Format: Article
Language:English
Subjects:
Deceleration
Universe
Online Access:Get full text
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Summary:In the present work we analyze the g-essence model for the particular Lagrangian: \(L=R+2[\alpha X^n+\epsilon Y-V(\psi,\bar{\psi})]\). The g-essence models were proposed recently as an alternative and as a generalization to the scalar k-essence. We have presented the 3 types solutions of the g-essence model. We reconstructed the corresponding potentials and the dynamics of the scalar and fermionic fields according the evolution of the scale factor. The obtained results shows that the g-essence model can describes the decelerated and accelerated expansion phases of the universe.
ISSN:2331-8422