Aspects of Geometric Inflation

Abstract

We revisit the recently proposed mechanism of Geometric Inflation. On general grounds, we show that obtaining the right amount of inflation demands an exceedingly large initial energy density. We introduce a scalar field and study the combined action of both mechanisms. Besides fixing the aforementioned issue, a cascading process occurs whose last step seems undistinguishable from ordinary large field inflation. Strikingly, the scalar field remains approximately constant while Geometric Inflation rules the dynamics. This ultimately leads to the possibility of reducing the initial value of the scalar field and its excursion. We discuss the main features of this hybrid scenario.

20 pages, 3 figures; v2: minor amendments and additions

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• New evidence and analysis of cosmological-scale asymmetry in galaxy spin directions
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• Large-scale asymmetry in galaxy spin directions -- analysis of galaxies with spectra in DES, SDSS, and DESI Legacy Survey
• Galaxy spin direction asymmetry in JWST deep fields
• Are there Einsteinian gravities involving covariant derivatives of the Riemann tensor?
• Decoherence of Dirac-particle quantumness for fermionic fields in a dilatonic black hole
• Spectral Bifurcations in Quasinormal Modes of Regular BTZ Black Holes