Nonlinear Spinor Fields in Bianchi type-I spacetime reexamined

Abstract

The specific behavior of spinor field in curve space-time with the exception of FRW model almost always gives rise to non-trivial non-diagonal components of the energy-momentum tensor. 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. In this paper within the scope of an anisotropic Bianchi type-I Universe we study the role of spinor field in the evolution of the Universe. It is found that there exist two possibilities. In one scenario the initially anisotropic Universe evolves into an isotropic one asymptotically, but in this case the spinor field itself undergoes some severe restrictions. In the second scenario the isotropization takes places almost at the beginning of the process.

19 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1103.2890

References in corpus (1)

• Noether symmetry for non-minimally coupled fermion fields

Cited by in corpus (8)

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• Nonlinear Spinor Fields in Bianchi type-I spacetime: Problems and Possibilities
• Nonlinear Spinor field in isotropic space-time and dark energy models
• Isotropization in Bianchi type-I cosmological model with fermions and bosons interacting via Yukawa potential
• Nonlinear Spinor Fields in Bianchi type-VI spacetime
• Nonlinear Spinor Fields in Bianchi type-$V{I}_0$ spacetime
• Nonlinear Spinor Fields in Bianchi type-III spacetime
• Nonlinear Spinor Fields in LRS Bianchi type-I spacetime: Theory and observation