# Hamiltonian Truncation and Effective Field Theory*

- Institution: CERN
- Department: TH institutes
- Speaker: Kara Farnsworth
- Year: 2022
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3015590)
- 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)

Hamiltonian truncation is a non-perturbative numerical method for calculating observables of a quantum field theory by truncating the Hilbert space to states with energy below a maximum energy cutoff. In this talk I will present an effective field theory approach to Hamiltonian truncation, which provides a systematic way of improving the calculations without increasing the energy cutoff. I will demonstrate this with numerical results for the two dimensional phi^4 theory, and talk about future applications of this method to more complicated theories.

## Lectures

1. [Hamiltonian Truncation and Effective Field Theory*](https://invisiblenetwork.ai/learn/cern/3015590/abf7e5477910), 1 h 34 min (CERN's player)