2016/10/31 by Denitsa Staicova, Michail Stoilov · 15 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cold dark matter #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark fluid #Dark matter #De Sitter universe #Galaxies: Formation, Evolution, Phenomena #Lambda-CDM model #Metric expansion of space #Physics #Scalar field #Scalar field dark matter #Theoretical physics #Universe #gr-qc #hep-th
paper · pdf · doi:10.1142/s0217732317500067
published in Modern Physics Letters A 32(01), 1750006 (World Scientific) · 14 pages, 3 figures. Typos corrected. New comments added
arxiv created 2016/10/31 · openalex publication_date 2016/12/08 · arxiv updated 2016/12/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recently, a model of modified gravity plus single scalar field was proposed, in which the scalar couples both to the standard Riemannian volume form given by the square root of the determinant of the Riemannian metric, as well as to another non-Riemannian volume form given in terms of an auxiliary maximal rank antisymmetric tensor gauge field. This model provides an exact unified description of both dark energy (via dynamically generated cosmological constant) and dark matter (as a “dust” fluid due to a hidden nonlinear Noether symmetry). In this paper, we test the model against Supernovae type Ia experimental data and investigate the future Universe evolution which follows from it. Our results show that this model has very interesting features allowing various scenarios of Universe evolution and in the same time perfectly fits contemporary observational data. It can describe exponentially expanding or finite expanding Universe and moreover, a Universe with phase transition of first kind. The phase transition occurs to a new, emerging at some time ground state with lower energy density, which affects significantly the Universe evolution.