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 advanced_notions:observable [2017/12/04 09:01]127.0.0.1 external edit advanced_notions:observable [2018/01/02 14:13] (current)jakobadmin ↷ Links adapted because of a move operation Both sides previous revision Previous revision 2018/01/02 14:13 jakobadmin ↷ Links adapted because of a move operation2017/12/04 09:01 external edit2017/11/19 06:57 jakobadmin [Researcher] 2017/11/19 06:43 jakobadmin [Researcher] 2017/11/19 06:42 jakobadmin created 2018/01/02 14:13 jakobadmin ↷ Links adapted because of a move operation2017/12/04 09:01 external edit2017/11/19 06:57 jakobadmin [Researcher] 2017/11/19 06:43 jakobadmin [Researcher] 2017/11/19 06:42 jakobadmin created Line 23: Line 23: The simplest example of an observable in gauge theory are Wilson loops. ​ The simplest example of an observable in gauge theory are Wilson loops. ​ - Take note that this procedure of modding out $\mathcal G$ from $\mathcal A$ is what leads to [[theories:​quantum_theory:​quantum_field_theory:​ghosts|Ghosts]]. To do this properly requires to make use of the [[advanced_tools:​gauge_symmetry:​brst|BRST]] formalism. ​ + Take note that this procedure of modding out $\mathcal G$ from $\mathcal A$ is what leads to [[advanced_notions:​quantum_field_theory:​ghosts|Ghosts]]. To do this properly requires to make use of the [[advanced_tools:​gauge_symmetry:​brst|BRST]] formalism. ​ (Source: Baez, Munian; Gauge Fields, Knots and Gravity, page 342) (Source: Baez, Munian; Gauge Fields, Knots and Gravity, page 342)