Quantum cosmology as a cure for the three ailments of classical cosmology

Narlikar, J. V. ; Padmanabhan, T. (1983) Quantum cosmology as a cure for the three ailments of classical cosmology Bulletin of the Astronomical Society of India, 11 (4). pp. 297-302. ISSN 0304-9523

Full text not available from this repository.

Official URL: http://www.ias.ac.in/jarch/jaa/11/297-310.pdf


The standard big bang models of classical cosmology are known to possess three defects. The oldest known defect is the spacetime singularity whose existence seems inevitable within the classical framework. The second defect is the existence of a particle horizon which severly limits communications across the distant parts of the universe whose observed homogeneity therefore becomes inexplicable. Recently a third defect has been highlighted, viz., the required fine tuning of the early universe close to the flat spatial model in order to account for the present range of its mean density. We show here that the injection of quantum ideas holds out hope of a cure for all the three ailments described above. Using a simple path integral formalism for quantum cosmology we present arguments which suggest that (i) it is extremely unlikely that the universe evolved to the present state from quantum states of singularity and particle horizon; (ii) of all the possible Robertson-Walker models that could evolve out of quantum fluctuations of the empty Minkowski universe the flat model is overwhelmingly probable.

Item Type:Article
Source:Copyright of this article belongs to Astronomical Society of India.
Keywords:Cosmology Classical; Cosmology Quantum; Big Bang
ID Code:72375
Deposited On:29 Nov 2011 13:56
Last Modified:29 Nov 2011 13:56

Repository Staff Only: item control page