# Thermalization of 2d Quantum Field Theories

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Delacrétaz Luca
- Year: 2021
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3004476)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

I will show that (1+1)d QFTs typically thermalize more slowly than the expected "Planckian" equilibration time 1/T. This arises due to causality, which imposes strong constraints on the emergence of hydrodynamic sound in low dimensions. Subluminality of sound further allows one to define a thermodynamic analogue of Zamolodchikov's C-function, and constrain the sign of the TT-bar term in the low energy limit of any 2d QFT..

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## Lectures

1. [Thermalization of 2d Quantum Field Theories](https://invisiblenetwork.ai/learn/cern/3004476/39f24989b689), 42 min (CERN's player)