Year: 1996
Type: article
Abstract: The existence of point symmetries in the cosmological field equations of generalized vacuum scalar - tensor theories is considered within the context of the spatially homogeneous cosmologies. It is found that such symmetries only occur in the Brans - Dicke theory when the dilaton field self-interacts. Moreover, the interaction potential of the dilaton must take the form of a cosmological constant. For the spatially flat, isotropic model, it is shown how this point symmetry may be employed to generate a discrete scale factor duality in the Brans - Dicke action.
Source: Classical and Quantum Gravity
Author: James E Lidsey
Institution: Queen Mary University of London
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2084267968