Singularity-free cosmology: a simple model

Sathyaprakash, B. S. ; Goswami, P. ; Sinha, K. P. (1986) Singularity-free cosmology: a simple model Physical Review D - Particles, Fields, Gravitation and Cosmology, 33 (8). pp. 2196-2200. ISSN 1550-7998

Full text not available from this repository.

Official URL:

Related URL:


The nonminimal coupling of a self-interacting complex scalar field with gravity is studied. For a Robertson-Walker open universe the stable solutions of the scalar-field equations are time dependent. As a result of this, a novel spontaneous symmetry breaking occurs which leads to a varying effective gravitational coupling coefficient. It is found that the coupling coefficient changes sign below a critical "radius" of the Universe implying the appearance of repulsive gravity. The occurrence of the repulsive interaction at an early epoch facilitates singularity avoidance. The model also provides a solution to the horizon problem.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:48078
Deposited On:14 Jul 2011 10:23
Last Modified:14 Jul 2011 10:23

Repository Staff Only: item control page