On the correctness of cosmology from quantum potential

Abstract

We examine in detail the cosmology based on quantal (Bohmian) trajectories as suggested in a recent study arXiv:1404.3093[gr-qc]. We disagree with the conclusions regarding predicting the value of the cosmological constant $\Lambda$ and evading the big bang singularity. Furthermore, we show that the approach of using a quantum corrected Raychaudhuri equation (QRE), as suggested in arXiv:1404.3093[gr-qc], is unsatisfactory, because, essentially, it uses the Raychaudhuri equation, 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.

7 pages (just the same as v1 but the height of pages are altered to make page numbers visible)

Cited by in corpus (3)

• Space-time second-quantization effects and the quantum origin of cosmological constant in covariant quantum gravity
• Comment on "Quantum Raychaudhuri equation"
• Perturbative instability of inflationary cosmology from quantum potentials