WHY BRST formulation works: Conditions imposed on QFT to find …
Oct 7, 2020 · Note that the BRST symmetry acts on a very different space than the gauge symmetry - the BRST symmetry acts on the extended phase space with ghosts (and ghosts-of …
Newest 'brst' Questions - Physics Stack Exchange
In the context of BRST we can define the Slavnov operator $\Delta_ {BRST}$ which generates BRST transformations. My lecture notes claim that $\Delta_ {BRST}$ is self-adjoint, but I don't …
hilbert space - BRST-quantization of open string at level $N=1 ...
I have a question regarding an equation in Polchinski's "String Theory, Volume 1, An introduction to the bosonic string". The equation is (4.3.27) on p.135. This section is about the brst …
Relation between cohomology and the BRST operator
A lengthier, but still quick and very readable discussion of this can be found in Josê Figueroa-O'Farrill's lecture notes on "BRST Cohomology".
How are Gribov ambiguities and BRST symmetry connected?
Dec 22, 2025 · Another important property of the BRST generator is that it is a function well defined everywhere in phase space. Global obstructions may be relevant when discussing …
How does the BRST transformation act on ghost fields?
Feb 11, 2022 · TL;DR: The BRST transformation rules for the ghost fields follow from requiring that the BRST/Slavnov operator squares to zero (= is nilpotent in physics jargon).
Why are physical states not eigenstates of BRST charge?
Nov 20, 2023 · This is before discussion of the BRST cohomology. However, from ordinary QM, states that are invariant under symmetries are not annihilated by the generators, but are …
quantum field theory - Geometric Interpretation of BRST …
Jun 20, 2017 · BRST quantization (and BRST symmetry in general), at least in this point in my understanding of them, seem rather arbitrary and slightly miraculous. However, the …
quantum field theory - What is the relationship between BRST …
Apr 3, 2016 · The quote "esoteric consistency condition" undoubtedly refers to the fact that the BRST transformation is nilpotent (=squares to zero), which encodes a (possibly infinite) tower …
lagrangian formalism - BRST as gauge symmetry or global …
How come the BRST "symmetry" contains both the interpretation of global symmetry and gauge symmetry (contains all gauge symmetries of the original gauge theory)?