# Soft Metric Fluctuations during inflation

- Institution: CERN
- Department: TH institutes
- Speaker: Kshitij Gupta
- Year: 2024
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3020009)
- 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)

We use EFT techniques to show the all orders conservation of the super-horizon scalar and tensor modes during inflation. The EFT is built in analogy with Soft de Sitter EFT. Power counting and symmetry arguments are used to directly constrain the time evolution. We also introduce Mellin representation as an advantageous scheme to connect the UV and EFT descriptions..

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## Lectures

1. [Soft Metric Fluctuations during inflation](https://invisiblenetwork.ai/learn/cern/3020009/48298f8b98c1), 1 h 5 min (CERN's player)