Extended closed inflationary universes

TL;DR

This paper explores closed inflationary universe models within Jordan-Brans-Dicke theory, demonstrating they are less restrictive than Einstein's theory and analyzing conditions for >1 and inflation duration.

Contribution

It introduces a novel closed inflationary universe model based on Jordan-Brans-Dicke theory and compares its constraints to those in Einstein's general relativity.

Findings

Model allows >1 more easily than Einstein's theory.

Characterizes the inflation period in Jordan-Brans-Dicke framework.

Shows reduced restrictions compared to traditional models.

Abstract

In this paper we study a type of model for closed inflationary universe models using the Jordan-Brans-Dicke theory. Herein we determine and characterize the existence of $\Omega>$1, together with the period of inflation. We have found that our model, which takes into account a Jordan-Brans-Dicke type of theory, is less restrictive than the one used in Einstein's theory of general relativity. Our results are compared to those found in Einstein's theory of Relativity.