Dynamically generated inflationary λLCDM

David Benisty, Eduardo I. Guendelman, Emil Nissimov, Svetlana Pacheva

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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, wherein 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 non-Riemannian spacetime volume-elements. The non-Riemannian volume element in the initial scalar field action leads to a hidden, nonlinear Noether symmetry which produces an energy-momentum tensor identified as the sum of a dynamically generated cosmological constant and dust-like dark matter. The non-Riemannian volume-element in the initial Einstein-Hilbert action upon passage to the physical Einstein-frame creates, dynamically, a second scalar fieldwith a non-trivial inflationary potential andwith an additional interaction with the dynamically generated dark matter. The resulting Einstein-frame 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 tensor-to-scalar ratio conform to the latest 2018 PLANCK data.

Original languageEnglish
Article number0481
JournalSymmetry
Volume12
Issue number3
DOIs
StatePublished - 1 Mar 2020

Keywords

  • Dark energy
  • Dark matter
  • Inflation

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Chemistry (miscellaneous)
  • Mathematics (all)
  • Physics and Astronomy (miscellaneous)

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