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Kantowski-Sachs String Cosmological Model with Bulk Viscosity In General Relativity |
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| Authors: | |
| Institution: | (1) Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, P.R.China |
| Abstract: | String cosmological models with bulk viscosity are investigated in Kantowski-Sachs space-time. To obtain a determinate solution, it is assumed that the coefficient of bulk viscosity is a power function of the scalar of expansion ζ = kθm and the scalar of expansion is proportional to the shear scalar θ ∝ σ, which leads to a relation between metric potentials R = AS n . The physical and geometrical aspects of the model are also discussed. It is shown that the bulk viscosity has significant influence on the evolution of the universe. There is a ‘big bang’ start in the model when m ≤ 1 but there is no ‘big bang’ start when m > 1. |
| Keywords: | string cosmological model Kantowski-Sachs space-time bulk viscosity |
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