51 citations · 121 across the 18 of their papers we have counts for
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gr-qc2010★ 21 cited
Hubble Parameter in QCD Universe for finite Bulk Viscosity
A. Tawfik, M. Wahba, H. Mansour +1
We consider the influence of the perturbative bulk viscosity on the evolution of the Hubble parameter in the QCD era of the early Universe. For the geometry of the Universe we assu…
gr-qc2010
Thermodynamics in the Viscous Early Universe
A. Tawfik
Assuming that the matter filling the background geometry in the Early Universe was a free gas and no phase transitions took place, we discuss the thermodynamics of this closed syst…