Helical Phase Inflation

Abstract

We show that the quadratic inflation can be realized by the phase of a complex field with helicoid potential. Remarkably, this helicoid potential can be simply realized in minimal supergravity. The global $U(1)$ symmetry of the Kähler potential introduces a flat direction and evades the $\eta$ problem automatically. So such inflation is technically natural. The phase excursion is super-Planckian as required by the Lyth bound, while the norm of the complex field can be suppressed in the sub-Planckian region. This model resolves the ultraviolet sensitive problem of the large field inflation, besides, it also provides a new type of monodromy inflation in supersymmetric field theory with consistent field stabilization.

4 pages+references, 2 figures, phase monodromy in supersymmetric field theory is added

References in corpus (11)

• Monodromy in the CMB: Gravity Waves and String Inflation
• A Natural Framework for Chaotic Inflation
• New models of chaotic inflation in supergravity
• An Ignoble Approach to Large Field Inflation
• General inflaton potentials in supergravity
• UV-Protected Inflation
• Minimal $R+R^2$ Supergravity Models of Inflation Coupled to Matter
• Inflating with Baryons
• A Minimal Sub-Planckian Axion Inflation Model with Large Tensor-to-Scalar Ratio
• Aligned Natural Inflation and Moduli Stabilization from Anomalous $U(1)$ Gauge Symmetries
• Pure Gravity Mediation and Chaotic Inflation in Supergravity

Cited by in corpus (3)

• On the viability of m**2 phi**2 and natural inflation
• Perspective on completing natural inflation
• Signatures of Planck Corrections in a Spiralling Axion Inflation Model