Speaker
Описание
Abstract
The standard cosmological model has been successful in describing the ob- served universe. It is a simple model that reproduces different observational data using only a few components of matter and energy. It is based on the Theory of General Relativity. However, this success is achieved by introducing a dark sector composed of dark matter and dark energy, components not yet di- rectly detected. Dark energy, in particular, is associated with quantum vacuum energy, which constitutes a connection between microphysics and macrophysics. This association contains serious problems that indicate that our understanding of this micro-macro connection is far from clear. Unimodular gravity gives a new perspective to the cosmological constant problem. This proposal is discussed in its original formulation in 4 dimensions and also in the Kaluza-Klein context in five dimensions
Links
A unimodular Kaluza-Klein theory Júlio C. Fabris, Richard Kerner Phys.Scripta 99 (2024) 8, 085042
• e-Print: 2403.17278 [gr-qc]