Spiral Inflation

TL;DR

This paper introduces a new spiral inflation model where the inflaton's spiral motion near a symmetry breaking potential yields observable inflationary signatures, matching Planck data without fine tuning.

Contribution

It presents a novel spiral inflation scenario that achieves large tensor-to-scalar ratios with sub-Planckian field values, aligning with observational data.

Findings

Achieves tensor-to-scalar ratio r ~ 0.1

Inflation occurs at sub-Planckian field values

Model matches Planck observational constraints

Abstract

We propose a novel scenario of primordial inflation in which the inflaton goes through a spiral motion starting from around the top of a symmetry breaking potential. We show that, even though inflation takes place for a field value much smaller than Planck scale, it is possible to obtain relatively large tensor to scalar ratio ($r \sim 0.1$) without fine tuning. The inflationary observables perfectly match Planck data.