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arxiv: 1010.1612 · v3 · pith:GEKVQYREnew · submitted 2010-10-08 · ⚛️ physics.gen-ph

Anisotropic model of dark energy dominated universe with hybrid expansion law

classification ⚛️ physics.gen-ph
keywords universebianchi-vdarkenergyspace-timeanisotropicdynamicalexpansion
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The paper deals with the study of the dynamics of Universe within the framework of a spatially homogeneous Bianchi-V space-time filled with a perfect fluid composed of non-interacting matter and dynamical dark energy components. We determine the Bianchi-V space-time by considering hybrid expansion law (HEL) for the average scale factor that yields power-law and exponential-law cosmologies in its special cases. In the HEL cosmology, the Universe exhibits transition from deceleration to acceleration. We find that the HEL Universe within the framework of Bianchi-V space-time is anisotropic at the early stages of evolution and becomes isotropic at late times. The dynamical dark energy in the HEL Bianchi-V Universe does not show departure from the usual cosmological constant at later times.

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