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Paper IPM / Physic / 7208  


Abstract:  
We study the equation of state at high redshift = 10^{17}, following the prescription outlined by Saini et al. [1]. Extending this prescription to high redshift, we obtain in recombination z=1000 and in the early matterdominated era which lies between lastscattering surface z=1100 and the equality of radiationmatter z=3000, omega is = −0.14. For 0 < = z < = 7.34 and 29 < = z < = 10^{7}, we find 1640 < = ω < = 0. At redshift 7.35 < = z < = 29, we obtain 0 < = ω < = 335 and for z > = 10^{7}, ω possesses disorderly oscillations so that ω = 0.14 at nucleosynthesis z = 10^{10}. At redshift 7.34 < = z < = 7.35, ω behaves asymptotically.
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