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Hubble parameter and related formulas for a Weyl scaling invariant dark energy action

Institute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540, USA

https://doi.org/10.1142/S0218271821500449Cited by:4 (Source: Crossref)

Abstract

We extend our previous analysis of a model for “dark energy” based on a Weyl scaling invariant dark energy action. We reexpress all prior results in terms of proper time, using the fluctuation amplitude $Φ$ without approximation, and derive a compact formula for the squared effective Hubble parameter. This formula involves effective dark energy and matter densities that differ from their expressions in the standard $Λ CDM$ cosmology. We also give new analytic results for the function $Φ$ and discuss their implications.

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