Quantum Diffusion in Sharp Transition to Non-Slow-Roll Phase

Understand

Transitions between different inflationary slow-roll scenarios are known to provide short non-slow-roll periods with non-trivial consequences.

• We consider the effect of quantum diffusion on the inflationary dynamics in a transition process.
• Using the stochastic {\delta}N formalism, we follow the detailed evolution of noises through a sharp transition modeled by the Starobinsky potential, although some of our results apply to any sharp transition.
• We find how the stochastic noise induced by the transition affects the coarse-grained fields.