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arXiv · 1410.2593

Dante's Waterfall

Christopher D. Carone·Joshua Erlich·Anuraag Sensharma·Zhen Wang
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Abstract

We describe a hybrid axion-monodromy inflation model motivated by the Dante's Inferno scenario. In Dante's Inferno, a two-field potential features a stable trench along which a linear combination of the two fields slowly rolls, rendering the dynamics essentially identical to that of single-field chaotic inflation. A shift symmetry allows for the Lyth bound to be effectively evaded as in other axion-monodromy models. In our proposal, the potential is concave downward near the origin and the inflaton trajectory is a gradual downward spiral, ending at a point where the trench becomes unstable. There, the fields begin falling rapidly towards the minimum of the potential and inflation terminates as in a hybrid model. We find parameter choices that reproduce observed features of the cosmic microwave background, and discuss our model in light of recent results from the BICEP2 and Planck experiments.

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Christopher D. Carone, Joshua Erlich, Anuraag Sensharma, Zhen Wang. 2015-02-09. Dante's Waterfall. https://doi.org/10.1103/physrevd.91.043512

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