Learn Group Theory for Physics: Beginner Guide

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SUMMARY

This discussion focuses on the necessity of understanding group theory, particularly Lie groups, for applications in quantum mechanics (QM) and particle theory. The participant expresses a desire to learn about special unitary groups (SU groups) and highlights the distinction between discrete mathematics and the continuous nature of Lie groups. Key prerequisites mentioned include a foundational knowledge of topology and familiarity with Hilbert space, which are essential for grasping the complexities of SU(2) and other Lie groups.

PREREQUISITES
  • Basic understanding of topology
  • Familiarity with Hilbert space concepts
  • Knowledge of Fourier analysis
  • Introductory group theory concepts
NEXT STEPS
  • Study "Introduction to Lie Algebras and Representation Theory" by James E. Humphreys
  • Research "Topology" by James R. Munkres for foundational concepts
  • Explore resources on "Quantum Mechanics" that integrate group theory
  • Learn about "Lie Groups and Lie Algebras" through online courses or lectures
USEFUL FOR

Students and researchers in physics, particularly those interested in quantum mechanics and particle theory, as well as anyone seeking to understand the application of group theory in these fields.

greatscott
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I'd like to learn group theory to understand QM and particle theory, and I looked at several books on discrete mathematics but they didn't mention SU groups. I'm an absolute beginner in group theory or discrete math, but I don't want to spend too much time on materials unrelated to physics. Do you have a suggestion on a good book or a good way to study group theory?
 
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Well, part of the problem is that SU(2), etc, is not discrete! It's continuous and has a nontrivial topology: it's an example of a Lie group. (pronounced "lee group")
 
I have heard of Lie groups. What are the prerequisites for studying Lie groups? I don't know what topology is per se, but I have taken a Fourier analysis class. I only have a superficial knowledge about Hilbert space (not in a rigorous "theorems, proofs and q.e.d's" manner).
 

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