Rosten, O. (2008). The Exact Renormalization Group - Lecture 4: Gauge Theories. Perimeter Institute for Theoretical Physics. https://pirsa.org/08050007
MLA
Rosten, Oliver. The Exact Renormalization Group - Lecture 4: Gauge Theories. Perimeter Institute for Theoretical Physics, May. 07, 2008, https://pirsa.org/08050007
BibTex
@misc{ scivideos_PIRSA:08050007,
doi = {},
url = {https://pirsa.org/08050007},
author = {Rosten, Oliver},
keywords = {},
language = {en},
title = {The Exact Renormalization Group - Lecture 4: Gauge Theories},
publisher = {Perimeter Institute for Theoretical Physics},
year = {2008},
month = {may},
note = {PIRSA:08050007 see, \url{https://scivideos.org/pirsa/08050007}}
}
At first sight, the ERG does not sit well with gauge theories: a naive implementation of the momentum cutoff central to the ERG breaks gauge invariance. However, things are not as they seem. Not only is it possible to construct a gauge invariant cutoff, but it is possible to construct manifestly gauge invariant ERGs. I will discuss the formulation, what has been achieved to date, and what can reasonably be hoped for in the future.
