18 citations · 18 across the 7 of their papers we have counts for
7 papers
Wormhole Reconstruction in Non-Conservative Unimodular Gravity: Ricci Scalar as an Independently Prescribed Curvature Profile
Marcelo H. Alvarenga, Rodrigo Santos Bufalo, Júlio C. Fabris
The absence of an algebraic relation between the Ricci scalar and the trace of the energy-momentum tensor in Non-Conservative Unimodular Gravity () opens new possibil…
Limits of the Rastall--Einstein Equivalence: Matter-Action Compatibility, FLRW Dynamics, and Exceptional Sectors
José A. C. Nogales, Karen-Luz Burgoa Rosso, Marcelo H. Alvarenga
A regular Rastall metric equation can be written exactly as an Einstein equation with a conserved algebraic source. We examine whether this source redefinition also preserves a spe…
Anisotropic Bianchi-I cosmological model in non-conservative unimodular gravity
Marcelo H. Alvarenga, Júlio C. Fabris
In this article, we propose an anisotropic Bianchi-I type cosmological model in non-conservative Unimodular Gravity (). We show that simply using the Bianchi-I type m…
Holographic Ricci dark energy in Nonconservative Unimodular Gravity
Marcelo H. Alvarenga, Júlio C. Fabris, Hermano Velten +1
The structure of unimodular gravity (UG) is invariant to a subclass of diffeomorphism, the transverse diffeomorphism, due to the unimodular condition (). Consequen…
Using cosmological perturbation theory to distinguish between General Relativity and Unimodular Gravity
Marcelo H. Alvarenga, Júlio C. Fabris, Hermano Velten
Unimodular Gravity is one of the oldest geometric gravity theory alternative to General Relativity. Essentially, it is based on the Einstein-Hilbert Lagrangian with an additional c…
Nonconservative unimodular gravity: Gravitational waves
Júlio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda +1
Unimodular gravity is characterized by an extra condition with respect to General Relativity: the determinant of the metric is constant. This extra condition leads to a more restri…
Nonconservative unimodular gravity: a viable cosmological scenario
Júlio C. Fabris, Marcelo H. Alvarenga, Mahamadou Hamani-Daouda +1
In this work we review the issue of imposing the conservation of the energy-momentum tensor as a necessary condition to recover the equivalence between the unimodular gravity and G…