What if Newton's Gravitational Constant was negative?

Ismael Ayuso; Jos\'e P. Mimoso; Nelson J. Nunes

What if Newton's Gravitational Constant was negative?

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arxiv 1903.07604 v1 pith:MQRSDD46 submitted 2019-03-18 gr-qc

Ismael Ayuso , José P. Mimoso , Nelson J. Nunes This is my paper · ORCID

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keywords gravitationalconstantcouplinggeneralattainedbranchconsidercosmological

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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.

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Degenerate and connection-dependent cosmological sectors in f(Q,C) gravity
gr-qc 2026-07 conditional novelty 6.0 of 10

Connection field equations force a degenerate f(R)-equivalent sector of f(Q,C) cosmology in which three geometric connections coincide, and only nonzero integration constants make the connections physically distinct.

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