Speaker
Dr
ChengJun Fang
(ITP-CAS)
Description
Non-attractor inflation has drawn significant attention as a class of inflationary models due to its potential to generate primordial black holes (PBHs). However, calculating the one-loop corrections to curvature perturbations in these models has sparked considerable theoretical controversy. We find that symmetry serves as a crucial clue in such loop calculations, and the Ward identity is precisely the standard manifestation of symmetry in quantum field theory. In this presentation, we will demonstrate how to apply Ward identities to these loop calculations.
Primary author
Dr
ChengJun Fang
(ITP-CAS)
