Talk:Gribov ambiguity

Related to polar actions?

I don't want to OR here, but the language used to describe what is desired of a gauge theory is almost the definition of a polar action. Is this recognized in the literature? ᛭ LokiClock (talk) 01:28, 25 November 2013 (UTC)[reply]

Its OR. The standard understanding of gauge fields is in terms of a principle fiber bundle; the gauge group acts on the fiber. (in some cases, one works with the associated bundle). If you are a mathematician, you can just take a local section of the bundle, by fiat, no problem. The problem arises because physicists like to pick a section, i.e. "fix the guage" by specifying some differential equation -- e.g. that the divergence vanish, or some-such, and this equation might specify several sections (or apparently, none at all) -- this is the Gribov ambiguity. Thus, the problem is not with taking a section of a bundle, but with using differential equations to specify the section. Its also where the term "fundamental modular region" comes from: its the generalized concept of the fundamental domain for SL(2,R)/SL(2,Z) (and the word "modular" comes from modular forms -- the idea being that modularity and fundamental domains generalize in general to arbitrary Lie groups, and that gauge fixing plops you into one of these.). Anyway, someone should add some text that says something like this to this article. 67.198.37.16 (talk) 19:37, 30 April 2016 (UTC)[reply]