Repulsive gravity induced by a conformally coupled scalar field implies a bouncing radiation-dominated universe
General Relativity and Quantum Cosmology
2017-06-15 v2
Abstract
In the present work we revisit a model consisting of a scalar field with a quartic self-interaction potential non-minimally (conformally) coupled to gravity [1]. When the scalar field vacuum is in a broken symmetry state, an effective gravitational constant emerges which, in certain regimes, can lead to gravitational repulsive effects when only ordinary radiation is coupled to gravity. In this case, a bouncing universe is shown to be the only cosmological solution admissible by the field equations when the scalar field is in such a broken symmetry state.
Keywords
Cite
@article{arxiv.1703.03060,
title = {Repulsive gravity induced by a conformally coupled scalar field implies a bouncing radiation-dominated universe},
author = {V. Antunes and M. Novello},
journal= {arXiv preprint arXiv:1703.03060},
year = {2017}
}
Comments
10 pages, 1 figure