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arXiv · 1509.06781

Multi-field inflation and the field-space metric

Joshua Erlich·Jackson Olsen·Zhen Wang
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Abstract

Multi-field inflation models include a variety of scenarios for how inflation proceeds and ends. Models with the same potential but different kinetic terms are common in the literature. We compare spiral inflation and Dante's inferno-type models, which differ only in their field-space metric. We justify a single-field effective description in these models and relate the single-field description to a mass-matrix formalism. We note the effects of the nontrivial field-space metric on inflationary observables, and consequently on the viability of these models. We also note a duality between spiral inflation and Dante's inferno models with different potentials.

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Joshua Erlich, Jackson Olsen, Zhen Wang. 2015-09-22. Multi-field inflation and the field-space metric. https://doi.org/10.1088/1475-7516%2F2016%2F09%2F039

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