Spinor Field with Polynomial Nonlinearity in LRS Bianchi type-I spacetime

Abstract

Within the scope of Bianchi type-I cosmological model the role of spinor field on the evolution of the Universe is investigated. In doing so we have considered a polynomial type of nonlinearity. It is found that depending on the sign of self-coupling constant the model allows either accelerated mode of expansion or oscillatory mode of evolution. Unlike general Bianchi type-I and Bianchi type $V{I}_0$ models in this case neither mass term nor the nonlinear term in the Lagrangian of spinor field vanish.

9 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:1409.4993; text overlap with arXiv:1507.03847

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