What if Newton's Gravitational Constant was negative?
arXiv:1903.07604 · doi:10.3390/galaxies7010038
Abstract
In this work, we seek a cosmological mechanism that may define the sign of the effective gravitational coupling constant, {\em G}. To this end, we consider general scalar-tensor gravity theories as they provide the field theory natural framework for the variation of the gravitational coupling. We find that models with a quadratic potential naturally stabilize the value of {\em G} into the positive branch of the evolution and further, that de Sitter inflation and a relaxation to General Relativity is easily attained.
arXiv comment16 pages, 16 figures
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