New views on classical and quantum Brans-Dicke theory
J\'ulio C. Fabris, Bertrand Chauvineau, Davi C. Rodrigues, Carla R., Almeida, Oliver F. Piattella
TL;DR
This paper explores new perspectives on Brans-Dicke theory, considering an external scalar field and its implications for black holes and the early universe, challenging the notion that it is indistinguishable from General Relativity.
Contribution
It introduces the idea of an external scalar field in Brans-Dicke theory and discusses its applications to black hole physics and cosmology.
Findings
Scalar field can be external in Brans-Dicke theory
Potential for distinguishability from General Relativity
Applications to black holes and primordial universe
Abstract
The Brans-Dicke action is one of the most natural extensions of the Einstein-Hilbert action. It is based on the introduction of a fundamental scalar field that effectively incorporates a dynamics to the gravitational coupling . In spite of the diverse motivations and the rich phenomenology that comes from its solutions, Solar System tests impose strong constraints on the Brans-Dicke theory, rendering it indistinguishable from General Relativity. In the present text, new perspectives for the Brans-Dicke theory are presented, based on the possibility that the scalar field presented in the BD theory can be external, as well as on the applications to black hole physics and the primordial universe.
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Taxonomy
TopicsCosmology and Gravitation Theories · Relativity and Gravitational Theory · Black Holes and Theoretical Physics