# Critical Number of Fields in Stochastic Inflation.

@article{Vennin2017CriticalNO,
title={Critical Number of Fields in Stochastic Inflation.},
author={Vincent Vennin and Hooshyar Assadullahi and Hassan Firouzjahi and Mahdiyar Noorbala and David Wands},
journal={Physical review letters},
year={2017},
volume={118 3},
pages={
031301
}
}
• Published 20 April 2016
• Physics
• Physical review letters
Stochastic effects in generic scenarios of inflation with multiple fields are investigated. First passage time techniques are employed to calculate the statistical moments of the number of inflationary e-folds, which give rise to all correlation functions of primordial curvature perturbations through the stochastic δN formalism. The number of fields is a critical parameter. The probability of exploring arbitrarily large-field regions of the potential becomes nonvanishing when more than two…
45 Citations

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