What if Newton’s Gravitational Constant Was Negative?
In this work, we seek a cosmological mechanism that may define the sign of the effective gravitational coupling constant, 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 tha...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-03-01
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Series: | Galaxies |
Subjects: | |
Online Access: | http://www.mdpi.com/2075-4434/7/1/38 |
Summary: | In this work, we seek a cosmological mechanism that may define the sign of the effective gravitational coupling constant, 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 G into the positive branch of the evolution and further, that de Sitter inflation and a relaxation to General Relativity is easily attained. |
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ISSN: | 2075-4434 |