# The one-loop power spectrum of curvature fluctuations in ultra slow-roll inflation

- Institution: CERN
- Department: TH institutes
- Speaker: Guillermo Ballesteros
- Year: 2024
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3019620)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

I will discuss the ratio of the one-loop to the tree-level power spectrum of curvature fluctuations in a toy model of USR inflation, with the aim of discerning if perturbation theory breaks in related scenarios of PBH dark matter..

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## Lectures

1. [The one-loop power spectrum of curvature fluctuations in ultra slow-roll inflation](https://invisiblenetwork.ai/learn/cern/3019620/229cdfa1f8b8), 51 min (CERN's player)