Kinetically stabilized inflation
Changhong Li, Hao Gong, Yeuk-kwan Edna Cheung

TL;DR
This paper introduces a string-inspired two-field inflation model that naturally stabilizes inflation kinetically, producing a nearly scale-invariant spectrum consistent with CMB data and predicting low gravitational wave signals.
Contribution
It proposes a novel two-field inflation mechanism inspired by string theory that addresses fine-tuning and produces observationally consistent primordial perturbations.
Findings
Achieves over 62 e-folds of inflation with specific parameters.
Generates a nearly scale-invariant primordial spectrum.
Predicts a low tensor-to-scalar ratio compatible with current observations.
Abstract
In this work, we propose a string-inspired two fields inflation model to address the fine-tuning problem that the standard inflation model suffers. The fast-rolling tachyon originated from the D-brane and anti-D-brane pair annihilation locks the inflaton slowly rolling on a Higgs-like potential and drives a kinetically stabilized (KS) inflation. Our numerical simulation confirms such a solution is a dynamic attractor. In particular, for , the e-folding number contributed by the KS inflation phase can be larger than to solve the horizon and flatness problems of Big Bang theory. Notably, this KS inflation generates a nearly scale-invariant primordial curvature perturbations spectrum consistent with current cosmic microwave background (CMB) observations. It predicts a low…
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Taxonomy
TopicsGeophysics and Gravity Measurements · Cosmology and Gravitation Theories · Solar and Space Plasma Dynamics
