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Non-Gaussianity in multi-field stochastic inflation with the scaling approximation

Non-Gaussianity in multi-field stochastic inflation with the scaling approximation

The statistics of multi-field inflation are investigated using the stochastic approach. We analytically obtain the probability distribution function of fields with the scaling approximation by extending the previous work by Amendola. The non-Gaussian nature of the probability distribution function is investigated by decomposing the fields into the adiabatic and isocurvature …