Dynamically Generated Inflationary ΛCDM
Abstract
Our primary objective is to construct a plausible unified model of inflation, dark energy and dark matter from a fundamental Lagrangian action first principle, where all fundamental ingredients are systematically dynamically generated starting from a very simple model of modified gravity interacting with a single scalar field employing the formalism of nonRiemannian spacetime volumeelements. The nonRiemannian volume element in the initial scalar field action leads to a hidden nonlinear Noether symmetry which produces energymomentum tensor identified as a sum of a dynamically generated cosmological constant and a dustlike dark matter. The nonRiemannian volumeelement in the initial EinsteinHilbert action upon passage to the physical Einsteinframe creates dynamically a second scalar field with a nontrivial inflationary potential and with an additional interaction with the dynamically generated dark matter. The resulting Einsteinframe action describes a fully dynamically generated inflationary model coupled to dark matter. Numerical results for observables such as the scalar power spectral index and the tensortoscalar ratio conform to the latest 2018 PLANCK data.
 Publication:

Symmetry
 Pub Date:
 March 2020
 DOI:
 10.3390/sym12030481
 arXiv:
 arXiv:2002.04110
 Bibcode:
 2020Symm...12..481B
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 24 pages, v.2 LaTeX style changed, references added, typos corrected