Year: 2025
Type: article
Abstract: In this work, we discuss the conditions that allow the establishment of an equivalence between f(R,T)=R+λh(T) gravity models and General Relativity (GR) coupled to a modified matter sector. We do so by considering a D-dimensional spacetime and the matter sector described by nonlinear electrodynamics and/or a scalar field. We find that, for this particular family of models, the action and field equations can indeed be written in terms of a modified matter source within GR. However, when several matter sources are combined, this interpretation is no longer possible if h(T) is a nonlinear function, due to the emergence of crossed terms that mix together the scalar and vector sectors.
Source: Universe
Authors: Gonzalo J. Olmo, Miguel A. S. Pinto
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,930
Awards: G1146902738, G1610934229, G1648110521, G2225181897, G2262748287, G250804818, Para além de Lambda, Instituto de Astrofísica e Ciências do Espaço, Applications of modified gravity in high energy astroparticle physics and cosmology, Instituto de Astrofísica e Ciências do Espaço, G3480869486, G3774079980, G4014979219, G425668148, G4511208782, G5010155614, G5222023348, G6520279273, G6731524417, G6997658380, G7858962851, G7863371703, G8451839200, G8497050386
OpenAlex ID: W4416596172