Sathyaprakash, BS and Goswami, P and Sinha, KP (1986) Singularity-free cosmology: A simple model. In: Physical Review D – Particles and Fields, 33 (8). pp. 2196-2200.
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Abstract
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: | Journal Article |
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Publication: | Physical Review D – Particles and Fields |
Publisher: | The American Physical Society |
Additional Information: | Copyright of this article belongs to The American Physical Society. |
Department/Centre: | Division of Physical & Mathematical Sciences Division of Physical & Mathematical Sciences > Astronomy and Astrophysics Programme Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 01 Feb 2010 07:41 |
Last Modified: | 19 Sep 2010 05:40 |
URI: | http://eprints.iisc.ac.in/id/eprint/22176 |
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