Einstein-Cartan gravity with scalar-fermion interactions

Olga Razina, Yerlan Myrzakulov, Nurzhan Serikbayev, Gulgasyl Nukarbaevna Nugmanova, Ratbay Myrzakulov

2011

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DOI 10.2478/s11534-011-0102-8
Data confidence 70 medium
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Abstract

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 ΛCDM model.