On de Sitter deflationary cosmology from the spin-torsion primordial fluctuations and COBE data

TL;DR

This paper investigates how primordial density fluctuations and spin-torsion effects in Einstein-Cartan theory can lead to a deflationary phase in de Sitter cosmology, using COBE data for empirical grounding.

Contribution

It introduces a novel analysis of de Sitter fluctuations incorporating spin-torsion effects and connects these to COBE observational data.

Findings

De Sitter solutions are unstable without torsion.

Spin-torsion fluctuations can induce a deflationary phase.

COBE data constrains spin-torsion density fluctuations.

Abstract

Fluctuations on de Sitter solution of Einstein-Cartan field equations are obtained in terms of the matter density primordial density fluctuations and spin-torsion density and matter density fluctuations obtained from COBE data. Einstein-de Sitter solution is shown to be unstable even in the absence of torsion.The spin-torsion density fluctuation to generate a deflationary phase is computed from the COBE data.