Difficulties in reconciling non-negligible differences between 
the local and cosmological values 
of the gravitational coupling in 
extended Brans-Dicke theories

Abstract We apply the classical double copy to the calculation of self-energy of composite systems with multipolar coupling to gravitational field, obtaining next-to-leading order results in the gravitational coupling GN by generalizing color to kinematics replacement rules known in literature. When applied to the multipolar description of the two-body system, the self-energy diagrams studied in this work correspond to tail processes, whose physical interpretation is of radiation being emitted by the non-relativistic source, scattered by the curvature generated by the binary system and then re-absorbed by the same source. These processes contribute to the conservative two-body dynamics and the present work represents a decisive step towards the systematic use of double copy within the multipolar post-Minkowskian expansion.

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A bound on the effective gravitational coupling from semiclassical black holes

Journal of High Energy Physics ◽

10.1088/1126-6708/2009/10/085 ◽

2009 ◽

Vol 2009 (10) ◽

pp. 085-085 ◽

Cited By ~ 18

Author(s):

R Brustein ◽

G Dvali ◽

G Veneziano

Keyword(s):

Black Holes ◽

Gravitational Coupling

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Accelerated expansion from a nonminimal gravitational coupling to matter

Physical Review D ◽

10.1103/physrevd.81.104046 ◽

2010 ◽

Vol 81 (10) ◽

Cited By ~ 72

Author(s):

O. Bertolami ◽

P. Frazão ◽

J. Páramos

Keyword(s):

Accelerated Expansion ◽

Gravitational Coupling

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Dark matter as a dynamic effect due to a non-minimal gravitational coupling with matter (II): Numerical results

Journal of Physics Conference Series ◽

10.1088/1742-6596/222/1/012011 ◽

2010 ◽

Vol 222 ◽

pp. 012011 ◽

Cited By ~ 3

Author(s):

J Páramos ◽

O Bertolami

Keyword(s):

Dark Matter ◽

Dynamic Effect ◽

Numerical Results ◽

Gravitational Coupling

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A self-sustained traversable scale-dependent wormhole

International Journal of Modern Physics D ◽

10.1142/s0218271818501018 ◽

2018 ◽

Vol 27 (09) ◽

pp. 1850101 ◽

Cited By ~ 14

Author(s):

Ernesto Contreras ◽

Pedro Bargueño

Keyword(s):

Vacuum Solution ◽

Planck Scale ◽

Gravitational Theory ◽

Gravitational Coupling ◽

Traversable Wormhole ◽

Effective Description

A self-sustained traversable wormhole is obtained as a vacuum solution of a scale-dependent gravitational theory. Comparisons with other approaches towards wormhole self-sustainability are presented with emphasis on the running of the gravitational coupling and on a possible effective description of gravity near the Planck scale.

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