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arXiv · 1012.3031

Accelerated expansion of the Universe driven by G-essence

K. K. Yerzhanov·P. Yu. Tsyba·Sh. R. Myrzakul·I. I. Kulnazarov·R. Myrzakulov
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Abstract

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.

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K. K. Yerzhanov, P. Yu. Tsyba, Sh. R. Myrzakul, I. I. Kulnazarov, R. Myrzakulov. 2010-12-14. Accelerated expansion of the Universe driven by G-essence. https://arxiv.org/abs/1012.3031

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