Clebsch-Gordan Coefficients for three spin-1 particles?

Click For Summary

Homework Help Overview

The discussion revolves around the Clebsch-Gordan coefficients for combining angular momenta of three spin-1 particles. The original poster is seeking resources or references to facilitate the transformation from total angular momentum to individual angular momentum states.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to understand how to construct states with specific magnetic quantum numbers and questions the process of coupling angular momenta. Some participants suggest combining angular momenta two at a time, while the poster expresses confusion about how to proceed with this method.

Discussion Status

The discussion is ongoing, with participants exploring the complexities of the problem. The original poster has articulated specific scenarios and questions, indicating a need for clarification on the coupling process. There is no explicit consensus, but some guidance has been offered regarding the method of combining angular momenta.

Contextual Notes

The original poster mentions a specific case of finding states with m = 2 and expresses uncertainty about the linear combinations needed for coupling. There is an implication of a lack of accessible resources or tables for reference.

dipole
Messages
553
Reaction score
149
I'm doing a problem where I need to know the coefficients to change from the
[itex]\vec{J} = \vec{J}_1 + \vec{J}_2 + \vec{J}_3[/itex] to the {[itex]\vec{J}_1, \vec{J}_2, \vec{J}_3[/itex]} for three spin-1 particles, but I'm having trouble finding a table or reference for this... surely every time someone needs to write such a wave function they don't do all the algebra by hand, so where can I find a table to do this?
 
Physics news on Phys.org
You combine the angular momenta two at a time.
 
vela said:
You combine the angular momenta two at a time.

This doesn't really help me...

For my situation, suppose I want to find all the states with [itex]m = 2[/itex]. Well, there are three possibilities:

[itex]\mid j = 3, m =2 \rangle[/itex]

and then two distinct states with [itex]\mid j = 2, m = 2 \rangle[/itex] which correspond to a
symmetric and anti-symmetric state, presumably. How can I construct these by just coupling [itex]j_{12}[/itex] with [itex]j_3[/itex] (where [itex]j_{12}[/itex] is the coupled-states of [itex]j_1[/itex] and [itex]j_2[/itex])? How do I even start and how do I know which linear combinations to couple to which? It's very confusing. :(
 
Well, give it a shot. There's no shortcut method if that's what you're looking for.
 

Similar threads

Replies
17
Views
3K
Replies
0
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
Replies
17
Views
4K
Replies
16
Views
3K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 20 ·
Replies
20
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
5
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K