Loop corrections to cosmological correlation functions during inflation
by
M. Sloth(Department of Physics and Astronomy, University of Aarhus)
→
Europe/Stockholm
FB51
FB51
Description
I will discuss our recent progress in understand IR divergencies in the correlation
functions of a scalar field in a quasi-de Sitter space. While we have previously shown that
one-loop effects can be large during inflation due to IR effect, we have to together with Antonio
Riotto recently investigated the resummation of all higher-order loop diagrams in the large N limit
of an O(N) invariant scalar field theory, and shown that the IR divergences disappear. In particular
we find a parametric enhancement of non-gaussian effects.
