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- W3099442980 abstract "Within the scope of Bianchi type-I cosmological model we study the role of spinor field in the evolution of the Universe. It is found that due to the spinor affine connections the energy momentum tensor of the spinor becomes non-diagonal, whereas the Einstein tensor is diagonal. This non-triviality of non-diagonal components of the energy-momentum tensor imposes some severe restrictions either on the spinor field or on the metric functions or on both of them. In case if the restrictions are imposed on the components of spinor field only, we come to a situation when spinor field becomes massless and invariants constructed from bilinear spinor forms also become trivial. Imposing restriction wholly on metric functions we obtain FRW model, while if the restrictions are imposed both on metric functions and spinor field components, we come to LRS BI model. In both cases the system is solved completely. It was found that if the relation between the pressure and energy density obeys a barotropic equation of state, only a non-trivial spinor mass can give rise to a dynamic EoS parameter." @default.
- W3099442980 created "2020-11-23" @default.
- W3099442980 creator A5052047096 @default.
- W3099442980 date "2015-04-10" @default.
- W3099442980 modified "2023-10-18" @default.
- W3099442980 title "Nonlinear spinor fields in Bianchi type-I spacetime: problems and possibilities" @default.
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- W3099442980 doi "https://doi.org/10.1007/s10509-015-2291-x" @default.
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