Dynamics of Logamediate Inflation

TL;DR

This paper analyzes the inflationary observables for logamediate inflation, comparing it with intermediate inflation, and shows both models align with cosmic background radiation data, highlighting multi-field dynamics equivalence.

Contribution

It introduces the computation of inflationary parameters for logamediate inflation and compares their consistency with observations, also exploring multi-field mimicking of single-field dynamics.

Findings

Both logamediate and intermediate inflation models are consistent with observational data.

Multi-field systems can replicate the dynamics of single inflaton fields.

The models' predictions align with cosmic background radiation measurements.

Abstract

A computation of the inflationary observables n_{s} and r is made for `logamediate' inflation where the cosmological scale factor expands as $a=\exp (A(\ln t)^{\lambda})$, and is compared to their predicted values in the intermediate inflationary theory, where $a=\exp (Bt^{f})$. Both versions prove to be consistent with observational measurements of the cosmic background radiation. It is shown that the dynamics of a single inflaton field can be mimicked by a system of several fields in an analogous manner to that created by the joint evolution of the fields in assisted power-law inflation.