PIRSA:08050007

The Exact Renormalization Group - Lecture 4: Gauge Theories

Rosten, O. (2008). The Exact Renormalization Group - Lecture 4: Gauge Theories. Perimeter Institute. https://pirsa.org/08050007

Rosten, Oliver. The Exact Renormalization Group - Lecture 4: Gauge Theories. Perimeter Institute, May. 07, 2008, https://pirsa.org/08050007 

          @misc{ pirsa_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},
            year = {2008},
            month = {may},
            note = {PIRSA:08050007 see, \url{https://pirsa.org}}
          }

Oliver Rosten University of Sussex

Collection
Talk Type Course

Abstract

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.