# Attacking the Sinh-Gordon model with relativistic continuous matrix product states*

- Institution: CERN
- Department: TH institutes
- Speaker: Antoine Tilloy
- Year: 2022
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3014996)
- 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)

The Sinh-Gordon model is a 1+1 dimensional quantum field theory with a potential cosh(b phi) that is quite peculiar. It is at the same time exactly solvable (for many observables) and not well understood. I will present the results of a variational exploration of its strong coupling regime with a recent generalization of continuous matrix product states. The advantage of this method is that it does not require introducing a cutoff, UV or IR, is fully non-perturbative, typically converges fast for Hamiltonians with polynomial interactions, and gives rigorous energy upper bounds. Its application to the Sinh-Gordon model is only partly successful: observables can be computed accurately up to fairly large values of the coupling, but the ultra strong coupling regime remains difficult to access without extrapolations. As a result, the behavior near the self-dual point is not yet fully settled. I will show the basics of relativistic continuous matrix product states, explain how they typically work for phi^4 like theories or even the easier Sine-Gordon model and finally discuss my attempts at taming Sinh-Gordon..

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## Lectures

1. [Attacking the Sinh-Gordon model with relativistic continuous matrix product states*](https://invisiblenetwork.ai/learn/cern/3014996/517d50eb2181), 1 h 34 min (CERN's player)