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Brans C. and Dicke R.H
1961
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Harko, T., Lobo, F.S.N., Nojiri, S. and Odintsov, S.D
2011
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Fabbri L
2012
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2019

Non-minimally coupled nonlinear spinor field in FRW cosmology

Saha, Bijan

Understand

Within the scope of a FRW cosmological model we have studied the role of spinor field in the evolution of the Universe when it is non-minimally coupled to the gravitational one.

We have considered a few types of nonlinearity.
It was found that if the spinor field nonlinearity describes an ordinary matter such as radiation, the presence of non-minimality becomes essential and leads to the rapid expansion of the Universe, whereas if the spinor field nonlinearity describes a dark energy, the evolution of the Universe is dominated by it and the difference between the minimal and non-minimally coupled cases become almost indistinguishable.