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arXiv · 2002.04110

Dynamically Generated Inflationary Lambda-CDM

David Benisty·Eduardo Guendelman·Emil Nissimov·Svetlana Pacheva
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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 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 energy-momentum tensor identified as a sum of a dynamically generated cosmological constant and a 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 field with a non-trivial inflationary potential and with 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.

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David Benisty, Eduardo Guendelman, Emil Nissimov, Svetlana Pacheva. 2020-02-10. Dynamically Generated Inflationary Lambda-CDM. https://doi.org/10.3390/sym12030481

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