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- Cairo UniversityEG27 papers
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7 papers · 2 filters
Discreteness of time in the evolution of the universe
Mir Faizal, Ahmed Farag Ali, Saurya Das
In this paper, we will first derive the Wheeler-DeWitt equation for the generalized geometry which occurs in M-theory. Then we will observe that M2-branes act as probes for this ge…
A Proposal for Testing Gravity's Rainbow
Ahmed Farag Ali, Mohammed M. Khalil
Various approaches to quantum gravity such as string theory, loop quantum gravity and Horava-Lifshitz gravity predict modifications of the energy-momentum dispersion relation. Magu…
Absence of an Effective Horizon for Black Holes in Gravity's Rainbow
Ahmed Farag Ali, Mir Faizal, Barun Majumder
We argue that the divergence in time for the asymptotic observer occurs because of specifying the position of the Horizon beyond the Planck scale. In fact, a similar divergence in…
Minimal Length, Friedmann Equations and Maximum Density
Adel Awad, Ahmed Farag Ali
Inspired by Jacobson's thermodynamic approach[gr-qc/9504004], Cai et al [hep-th/0501055,hep-th/0609128] have shown the emergence of Friedmann equations from the first law of thermo…
Cosmology from quantum potential
Ahmed Farag Ali, Saurya Das
It was shown recently that replacing classical geodesics with quantal (Bohmian) trajectories gives rise to a quantum corrected Raychaudhuri equation (QRE). In this article we deriv…
Planck-Scale Corrections to Friedmann Equation
Adel Awad, Ahmed Farag Ali
Recently, Verlinde proposed that gravity is an emergent phenomenon which originates from an entropic force. In this work, we extend Verlinde's proposal to accommodate generalized u…