Multi-field inflation from single-field models

Quantization implies independent degrees of freedom that do not appear in the classical theory, given by fluctuations, correlations, and higher moments a state. A systematic derivation resulting dynamical systems is presented here cosmological application for near-Gaussian states single-field inflation model. As consequence, Higgs made viable observationally becoming multi-field model with specific potential fluctuation field interacting inflaton expectation value. Crucially, non-adiabatic methods semiclassical quantum dynamics reveal important phases can set suitable initial conditions slow-roll (in combination uncertainty relation), then end after preferred number e-folds. New parameters interaction are derived from properties underlying background state, demonstrating how non-Gaussianity affect observational features or, conversely, observations may be used to understand state inflaton.