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Scalar field and Cosmological constant in $f(R,T)$ gravity for Bianchi type-I Universe | | G. P. Singh
; Binaya K. Bishi
; P. K. Sahoo
; | | Date: |
21 Jun 2015 | | Abstract: | In this article, we have tried to analyse the behaviour of scalar field and
cosmological constant in f(R,T) theory of gravity. Here we consider simplest
form of $f(R,T)$ i.e $f(R,T)=R+2f(T)$ and explore the spatially homogeneous and
anisotropic Locally Rotationally Symmetric (LRS) Bianchi type-I cosmological
model. It is assumed that the universe is filled with two noninteracting matter
sources, scalar field (normal or phantom) with scalar potential and matter
contribution due to $f(R,T)$ action. We have discussed two cosmological models
according to power law and exponential law along with constant and exponential
scalar potential as submodels. Power law models is compatible with normal
(quintessence) and phantom scalar field where as exponential models is
compatible with only normal (quintessence) scalar field. Cosmological constant
is in agreement with the observation from literature for our models. Finally we
discussed some physical and kinematical properties of both the models. | | Source: | arXiv, 1506.8055 | | Services: | Forum | Review | PDF | Favorites | |
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