About
We will discuss methods of circumventing the fermion doubling problem in 3+1d Hamiltonian lattice models. In particular, we will construct a 3+1d model with a single Weyl fermion and an exact UV symmetry which implies the conservation of chiral charge in the IR. We will do the same for the SU(2) symmetry of a single Weyl doublet, finding a connection between an object in integrability known as the Onsager algebra, and Witten's SU(2) anomaly. Time permitting, we will also discuss 2+1d models with the parity anomaly.
This talk is based on https://arxiv.org/abs/2503.07708 with Lei Gioia (Caltech)
(online talk) .
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The talk
Credits and licence
- Institution
- CERN
- Department
- TH String Theory Seminar
- Speaker
- Ryan Thorngren
- Year
- 2025
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed