Spiral Inflation

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.

Comments: 5 pages, 7 figures, typos corrected, matched to journal version