PIRSA:13050050

# A gauge theory generalization of the fermion-doubling theorem

### APA

McGreevy, J. (2013). A gauge theory generalization of the fermion-doubling theorem. Perimeter Institute. https://pirsa.org/13050050

### MLA

McGreevy, John. A gauge theory generalization of the fermion-doubling theorem. Perimeter Institute, May. 10, 2013, https://pirsa.org/13050050

### BibTex

@misc{ pirsa_PIRSA:13050050, doi = {10.48660/13050050}, url = {https://pirsa.org/13050050}, author = {McGreevy, John}, keywords = {Quantum Fields and Strings, Condensed Matter}, language = {en}, title = {A gauge theory generalization of the fermion-doubling theorem}, publisher = {Perimeter Institute}, year = {2013}, month = {may}, note = {PIRSA:13050050 see, \url{https://pirsa.org}} }

John McGreevy University of California, San Diego

**Collection**

**Talk Type**Conference

## Abstract

This talk is about obstructions to symmetry-preserving regulators of quantum field theories in 3+1 dimensions. New examples of such obstructions can be found using the fact that 4+1-dimensional SPT states are characterized by their edge states.(Based on work in progress with S.M. Kravec.)