Fibre bundles for describing gauge invariance

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SUMMARY

Fibre bundles are not strictly necessary for understanding gauge invariance in electromagnetic cases, as gauge invariance can be comprehended without them for both abelian and non-abelian symmetries. However, fibre bundles provide essential mathematical structures that enhance the understanding of gauge theories, particularly in modern literature focusing on topological aspects. Notable physicists such as Feynman, Weinberg, and 't Hooft achieved significant advancements in gauge theory without referencing fibre bundles, indicating that while they are useful, they are not mandatory for grasping the fundamental concepts.

PREREQUISITES
  • Understanding of gauge invariance principles
  • Familiarity with abelian and non-abelian symmetries
  • Basic knowledge of fibre bundles in mathematics
  • Awareness of the standard model of particle physics
NEXT STEPS
  • Research the mathematical foundations of fibre bundles
  • Explore gauge theories in the context of the standard model
  • Study the role of topology in modern physics
  • Investigate the contributions of Feynman, Weinberg, and 't Hooft to gauge theory
USEFUL FOR

This discussion is beneficial for theoretical physicists, mathematicians studying gauge theories, and students interested in the intersection of topology and physics.

limarodessa
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Hello all !

My question:

Does fibre bundles are necessary for describing gauge invariance in electromagnetic case? Or fibre bundles uses only for describing gauge invariance in cases of weak, electroweak and strong interactions?

Thanks
 
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They are not necessary in the sense that you can perfectly understand gauge invariance (for abelian as well for non-abelian symmetries) for many practical purposes w/o referring to fibre bundles.

But the underlying mathematical structures are fibre bundles, and there are some topics where the related tools and insights are useful or necessary. In addition the modern literature especially regarding topological aspects of gauge theories (partially) uses fibre bundles.

But of course there are aspects of the standard model which are accessable w/o ever referring to fibre bundles (Feynman, Weinberg, 't Hooft and many others were awarded nobel prizes - and I guess at that time they never discussed fibre bundles)
 

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