# Geometrical destabilisation of light fields in String Inflation

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Veronica Guidetti
- Year: 2019
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3001532)
- 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)

A typical feature of 4D string models is the presence, at tree-level, of a plethora of massless fields called moduli. Some of them are axion-like fields which become massive only via tiny non-perturbative effects which tend to make them naturally very light. When these fields live on a curved manifold a geometrical destabilisation of the inflationary trajectory can be induced since the growth of the isocurvature perturbations quickly brings the system in the non-perturbative regime..

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## Lectures

1. [Geometrical destabilisation of light fields in String Inflation](https://invisiblenetwork.ai/learn/cern/3001532/e1e130755d77), 16 min (CERN's player)