On the correctness of cosmology from quantum potential

Lashin, E.I. 


Abstract


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.


Other data

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
10.1142/S0217732316500449


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