3 papers
gr-qc2026
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…
gr-qc2026
Limits of the Rastall--Einstein Equivalence: Matter-Action Compatibility, FLRW Dynamics, and Exceptional Sectors
José A. C. Nogales, José A. C. Nogales, Karen-Luz Burgoa Rosso +1
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…
gr-qc2025
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…