On the geometrical interpretation of scale-invariant models of inflation

TL;DR

This paper explores the geometric features of scale-invariant two-field inflation models, demonstrating that maximal symmetry in the field space leads to universal inflationary predictions regardless of specific model details.

Contribution

It reveals that maximal symmetry in the field-derivative space results in universal inflation predictions in scale-invariant two-field models.

Findings

Maximal symmetry in the field space correlates with universal inflationary outcomes.

Inflation predictions are independent of model specifics under certain geometric conditions.

The geometric approach provides a unifying perspective on inflation models.

Abstract

We study the geometrical properties of scale-invariant two-field models of inflation. In particular, we show that when the field-derivative space in the Einstein frame is maximally symmetric during inflation, the inflationary predictions can be universal and independent of the details of the theory.