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advanced_tools:cocycles [2018/01/02 13:12]
advanced_tools:cocycles [2018/01/02 14:12] (current)
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 +====== Cocycles ======
 +
 +<tabbox Why is it interesting?> ​
 +
 +"In field theory and in modern elementary particle theory, cocycles
 +are used to describe [[advanced_notions:​quantum_field_theory:​anomalies|anomalies]]."​ ([[https://​inspirehep.net/​record/​213998/​files/​v15-n3-p99.pdf|Source]])
 +
 +1-cocycles are used to understand anomalies in the Lagrangian framework. The 1-cocycles show up in the non-conservation of classically conserved currents. ​
 +
 +2-cocycles are used to understand anomalies in the Hamiltonian framework. They have the effect that it becomes impossible to satisfy Gauss' law.
 +([[https://​inspirehep.net/​record/​213998/​files/​v15-n3-p99.pdf|Source]])
 +<tabbox Layman> ​
 +
 +<note tip>
 +Explanations in this section should contain no formulas, but instead colloquial things like you would hear them during a coffee break or at a cocktail party.
 +</​note>​
 +  ​
 +<tabbox Student> ​
 +For a great introduction see https://​inspirehep.net/​record/​213998/​files/​v15-n3-p99.pdf and chapter III in Analysis On Infinite Dimensional Manifolds: Schrodinger Representation For Quantized Fields by R. Jackiw
 +<tabbox Researcher> ​
 +
 +<note tip>
 +The motto in this section is: //the higher the level of abstraction,​ the better//.
 +</​note>​
 +
 +--> Common Question 1#
 +
 + 
 +<--
 +
 +--> Common Question 2#
 +
 + 
 +<--
 +  ​
 +<tabbox Examples> ​
 +
 +--> Example1#
 +
 + 
 +<--
 +
 +--> Example2:#
 +
 + 
 +<--
 +  ​
 +<tabbox History> ​
 +
 +</​tabbox>​
 +