# Hamiltonian truncation in AdS*

- Institution: CERN
- Department: TH institutes
- Speaker: Matthijs Hogervorst
- Year: 2022
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3015103)
- 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)

Anti-de Sitter spacetime is interesting for many reasons: of course it furnishes a canvas for the study of quantum gravity, but it also appears to be a fruitful setting for Hamiltonian truncation. After all, QFTs in AdS have a notion of conserved energy, their Hilbert spaces are well-understood, and even a hard energy cutoff preserves many spacetime symmetries. In this talk I will discuss this framework in detail and present some results on both scalar fields and 2d minimal models. In particular, I will discuss the issue of divergent counterterms that arise from the curvature of AdS, and present a prescription to extract the correct continuum limit.

Based on work with M. Meineri, J. Penedones and K. Salehi Vaziri, arXiv:2104.10689. An introductory example in Python can be found at the attached link..

0:00:00 Slide 1

0:07:12 Slide 2

0:09:30 Slide 3

0:13:22 Slide 4

0:15:05 Slide 5

0:18:01 Slide 6

1:10:39 Slide 7

1:12:34 Slide 8

1:15:01 Slide 9

1:16:35 Slide 10

1:17:55 Slide 11

1:18:59 Slide 12

1:20:41 Slide 13

1:32:59 Slide 14

1:43:12 Slide 15

## Lectures

1. [Hamiltonian truncation in AdS*](https://invisiblenetwork.ai/learn/cern/3015103/f8f9deba3484), 1 h 45 min (CERN's player)