3 papers
gr-qc2026
Perturbative analysis of singularity-free cosmological solutions in unimodular Kaluza-Klein theory
J. C. Fabris, S. Faller, R. Kerner
The unimodular version of the Kaluza-Klein theory is briefly recalled, and its projection on the -dimensional spacetime is constructed. Imposing unimodularity condition on the $…
gr-qc2025
A Five-dimensional Kaluza-Klein Approach to Unimodular Gravity
Júlio C. Fabris, Richard Kerner
In this article we present a possibility of imposing the unimodular condition within the 5-dimensional Kaluza-Klein theory including the scalar field. Unimodular gravity became an…
gr-qc2025
On the Stability of Non-Singular Solutions in Effective Theory from Kaluza-Klein Unimodular Gravity
Júlio C. Fabris, Richard Kerner
Unimodular theory incorporating the Kaluza-Klein construction in five dimensions leads, after reduction to four dimensions, to a new class of scalar-tensor theory. The vacuum cosmo…