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

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Cited by in corpus (17)

• Trajectories with suppressed tensor-to-scalar ratio in Aligned Natural Inflation
• On the viability of m**2 phi**2 and natural inflation
• Toward pole inflation and attractors in supergravity : Chiral matter field inflation
• Single-Superfield Helical-Phase Inflation
• On SUSY Restoration in Single-Superfield Inflationary Models of Supergravity
• Symmetry Breaking Indication for Supergravity Inflation in Light of the Planck 2015
• Perspective on completing natural inflation
• Power spectrum oscillations from Planck-suppressed operators in effective field theory motivated monodromy inflation
• Signatures of Planck Corrections in a Spiralling Axion Inflation Model
• New method of exponential potentials reconstruction based on given scale factor in phantonical two-field models
• Helical phase inflation and its observational constraints
• Spontaneous baryogenesis in spiral inflation
• New- vs. chaotic-inflations
• The Upper Bound on the Tensor-to-Scalar Ratio Consistent with Quantum Gravity
• Flavored axion-monodromy inflation
• Generic no-scale inflation inspired from string theory compactifications
• The (relative) size does not matter in inflation