Dynamics of Bianchi I Universe in Extended Gravity with Scale Factors

Fakhereh MD. Esmaeili
2018 Journal of High Energy Physics Gravitation and Cosmology  
In this paper, the dynamical behavior of an anisotropic universe in an extended gravity e.g. the ( ) , f R T theory of gravity is studied. We use ( ) , where R is the Ricci scalar, T is the trace of energy-momentum tensor and µ is a constant. Two cosmological models are constructed using the power law expansion and hybrid law cosmology in Bianchi type I universe, where the matter field is considered to be a perfect fluid. It is found that in both the cases the anisotropic behavior is in
more » ... avior is in agreement with the observational results. The state finder diagnostic pair and energy conditions are also calculated and analyzed. (SN Ia) [1] [2] [3], the cosmic ray Microwave Background (CMB) [4] [5], Wilkinson Microwave Planck and the Sloan Digital Sky Survey [6] [7] strongly suggest the acceleration of the universe. An unprecedented view of our dark universe has been shown by the recent discovery of the gravitational wave by LIGO (Laser Interferometer Gravitational-Wave Observatory). With the help of precise measurement of advanced LIGO, we will be able to test the differences between Einstein's General Theory of Relativity and it's extended theories [8] [9]. Primary ideas of generalization of the GR have gone beyond the Einstein-Hilbert action. The generalization of interest here is including the term of F. MD. Esmaeili the models along with the energy conditions are described in Section IV. Concluding remarks are given in Section V.
doi:10.4236/jhepgc.2018.44040 fatcat:avlziraqonhsdaehabzxofra7a