Speaker
Jacopo Fumagalli
(ICCUB - Universitat de Barcelona)
Description
How small-scale enhanced scalar fluctuations influence large scales, for instance, the one probed by the CMB, has recently been the object of an intense debate. In this context, I will first show that one-loop corrections to the large-scale power spectrum from small-scale modes in non-slow-roll dynamics are always negligible, namely they are volume suppressed by the ratio of the short to long distance scales.
I will then discuss ways to have resonant IR cascades, namely cases where loop corrections can be significant in the near infrared.
Primary author
Jacopo Fumagalli
(ICCUB - Universitat de Barcelona)
