Speaker
Mr
Tommi Markkanen
Description
Continuing on the topic of the stochastic formalism, in this talk I will present the lesser known stochastic spectral expansion and show how it can be used to calculate correlation functions generated during inflation. I also discuss the shortcomings of some of the commonly used approximations and present the full stochastic calculation for the isocurvature spectrum of a decoupled spectator, which demonstrates that it is a viable candidate of dark matter, contrary to popular belief. arXiv:1904.11917 & arXiv:1811.02586
