- #1

fresh_42

Mentor

- 12,879

- 9,512

## Summary:

- Simple Lie groups and their algebras in QM, physics of the root system

## Main Question or Discussion Point

As some simple Lie groups and their algebras are essential for our current understanding of QM, I wondered if especially the highest positive (or likewise lowest negative) root can be explained physically. The roots are the weights of the adjoint representation. Are their physical meanings behind other representations, too?