On the correctness of cosmology from quantum potential

Lashin, E.I. 


We examine in detail the cosmology based on quantal (Bohmian) trajectories as suggested in a recent study [A. F. Ali and S. Das, Phys. Lett. B 741, 276 (2014)]. We disagree with the conclusions regarding predicting the value of the cosmological constant Λ and evading the Big Bang singularity. Furthermore, we show that the approach of using a quantum corrected Raychaudhuri equation (QRE), as suggested in A. F. Ali and S. Das, Phys. Lett. B 741, 276 (2014), is unsatisfactory, because, essentially, it uses the Raychaudhuri equation (RE), which is a kinematical equation, in order to predict dynamics. In addition, even within this inconsistent framework, the authors have adopted unjustified assumptions and carried out incorrect steps leading to doubtful conclusions.

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Keywords Gravitation; cosmology; Raychaudhuri equation; Bohmian trajectories; gravitational collapse
Issue Date 2016
Publisher World Scientific
Journal Modern Physics Letters A 
URI http://research.asu.edu.eg/123456789/659
DOI http://www.scopus.com/inward/record.url?eid=2-s2.0-84960462501&partnerID=MN8TOARS

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