Stability analysis of LRS Bianchi type-$I$ cosmological model with varying $\varLambda$
S ANGIT RAKESH RAUSHAN R CHAUBEY
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In this paper, we deal with locally rotationally symmetric Bianchi type-$I$cosmological model with varying cosmological constant. Here, we have considered two models. In Model $I$, we have analysed total linear stability analysis for linear coupling between the dark sector of the Universe where as in Model $II$, the quadratic coupling between the dark sector of the Universe is considered. The cosmological history of the models is studied by finding all the critical points and analysing their local stability. We study the behaviour of all the critical points of the model when they are hyperbolic in nature using the linear Jacobi stability analysis and when they are non hyperbolic in nature using centre manifold theory. The perseverance of the equilibrium points is illustrated in phase portraits.
S ANGIT1 RAKESH RAUSHAN1 R CHAUBEY1
Volume 97, 2023
Continuous Article Publishing mode
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