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Inflation in Multi-field Modified DBM Potentials

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arxiv 1807.07654 v2 pith:NRUP3VV4 submitted 2018-07-19 astro-ph.CO hep-th

classification astro-ph.COhep-th
keywords inflationrandomfieldsmulti-fieldpotentialsprocessresultsapproximation
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abstract

We study multi-field inflation in random potentials generated via a non-equilibrium random matrix theory process. We make a novel modification of the process to include correlations between the elements of the Hessian and the height of the potential, similar to a Random Gaussian Field (RGF). We present the results of over 50,000 inflationary simulations involving 5-100 fields. For the first time, we present results of $\mathcal{O}(100)$ fields using the full `transport method', without slow-roll approximation. We conclude that Planck compatibility is a common prediction of such models, however significant isocurvature power at the end of inflation is possible.

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Cited by 1 Pith paper

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  1. Robust non-minimal attractors in many-field inflation

    astro-ph.CO 2025-04 conditional novelty 7.0 of 10

    For non-minimally coupled many-field inflation with at least one ξ ≫ 1, CMB observables match single-field predictions, with explicit large-N formulas for e-folds, Hubble scale, and turn rate.

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