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Useful relations among the generators in the defining and adjoint representations of SU(N)
by Howard E. Haber
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Howard Haber |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/1912.13302v1 (pdf) |
| Date accepted: | 2021-01-08 |
| Date submitted: | 2020-09-10 09:02 |
| Submitted by: | Haber, Howard |
| Submitted to: | SciPost Physics Lecture Notes |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
There are numerous relations among the generators in the defining and adjoint representations of SU(N). These include Casimir operators, formulae for traces of products of generators, etc. Due to the existence of the completely symmetric tensor $d_{abc}$ that arises in the study of the SU(N) Lie algebra, one can also consider relations that involve the adjoint representation matrix, $(D^a)_{bc}=d_{abc}$. In this review, we summarize many useful relations satisfied by the defining and adjoint representation matrices of SU(N). A few relations special to the case of N=3 are highlighted.
Published as SciPost Phys. Lect. Notes 21 (2021)
Reports on this Submission
Anonymous Report 1 on 2020-12-28 (Invited Report)
- Cite as: Anonymous, Report on arXiv:1912.13302v1, delivered 2020-12-28, doi: 10.21468/SciPost.Report.2342
Strengths
1-The writer is clear in their goal and presentation of their work
2-Many identities that require long derivation are presented in an easy to understand and compact manner
3-Identities presented in this work are easily applied to problems in physics. In particularly, trace identities which appear when working with chiral Lagrangians in quantum field theory come to mind.
Weaknesses
1-There do not appear to be any new results in this work. The point of this work is to collect results in the literature and present them in a succinct way.
Report
Assuming that this work is correct in its assertion that there is no single reference compiling the identities, I find that this work meets the criteria for publishing in SciPost Physics Lecture Notes. The work is clear and a useful resource for anyone working with the generators of SU(N). I was able to reproduce all equations just by following the work.
Requested changes
I have no requested changes.