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Einstein-Cartan gravity with scalar-fermion interactions
Published 28 Dec 2010 in astro-ph.CO, gr-qc, hep-ph, and hep-th | (1012.5690v2)
Abstract: In this paper, we have considered the g-essence and its particular cases, k-essence and f-essence, within the framework of the Einstein-Cartan theory. We have shown that a single fermionic field can give rise to the accelerated expansion within the Einstein-Cartan theory. The exact analytical solution of the Einstein-Cartan-Dirac equations is found. This solution describes the accelerated expansion of the Universe with the equation of state parameter $w=-1$ as in the case of $\Lambda$CDM model.
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