Helical phase inflation, using the phase of a complex scalar as the inflaton, fits Planck 2018 and BICEP2 data and is claimed to show alpha-attractor behavior, with a brane version that reduces field excursions.
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Helical phase inflation and its observational constraints
Helical phase inflation, using the phase of a complex scalar as the inflaton, fits Planck 2018 and BICEP2 data and is claimed to show alpha-attractor behavior, with a brane version that reduces field excursions.