Template:Short description
This is a table of Clebsch–Gordan coefficients used for adding angular momentum values in quantum mechanics . The overall sign of the coefficients for each set of constant j 1 , j 2 , j is arbitrary to some degree and has been fixed according to the Condon–Shortley and Wigner sign convention as discussed by Baird and Biedenharn .[ 1] Tables with the same sign convention may be found in the Particle Data Group 's Review of Particle Properties [ 2] and in online tables.[ 3]
Contents
1 Formulation
2 Specific values
2.1 j 2 = 0 Script error: No such module "Check for unknown parameters".
2.2 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.3 j 1 = 1, j 2 = 1/2 Script error: No such module "Check for unknown parameters".
2.4 j 1 = 1, j 2 = 1 Script error: No such module "Check for unknown parameters".
2.5 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.6 j 1 = Template:Sfrac, j 2 = 1 Script error: No such module "Check for unknown parameters".
2.7 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.8 j 1 = 2, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.9 j 1 = 2, j 2 = 1 Script error: No such module "Check for unknown parameters".
2.10 j 1 = 2, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.11 j 1 = 2, j 2 = 2 Script error: No such module "Check for unknown parameters".
2.12 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.13 j 1 = Template:Sfrac, j 2 = 1 Script error: No such module "Check for unknown parameters".
2.14 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
2.15 j 1 = Template:Sfrac, j 2 = 2 Script error: No such module "Check for unknown parameters".
2.16 j 1 = Template:Sfrac, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
3 SU(N) Clebsch–Gordan coefficients
4 References
5 External links
Formulation
The Clebsch–Gordan coefficients are the solutions to
| j 1 , j 2 ; j , m ⟩ = ∑ m 1 = − j 1 j 1 ∑ m 2 = − j 2 j 2 | j 1 , m 1 ; j 2 , m 2 ⟩ ⟨ j 1 , j 2 ; m 1 , m 2 ∣ j 1 , j 2 ; j , m ⟩
Explicitly:
⟨ j 1 , j 2 ; m 1 , m 2 ∣ j 1 , j 2 ; j , m ⟩ = δ m , m 1 + m 2 ( 2 j + 1 ) ( j + j 1 − j 2 ) ! ( j − j 1 + j 2 ) ! ( j 1 + j 2 − j ) ! ( j 1 + j 2 + j + 1 ) ! × ( j + m ) ! ( j − m ) ! ( j 1 − m 1 ) ! ( j 1 + m 1 ) ! ( j 2 − m 2 ) ! ( j 2 + m 2 ) ! × ∑ k ( − 1 ) k k ! ( j 1 + j 2 − j − k ) ! ( j 1 − m 1 − k ) ! ( j 2 + m 2 − k ) ! ( j − j 2 + m 1 + k ) ! ( j − j 1 − m 2 + k ) ! .
The summation is extended over all integer Template:Mvar for which the argument of every factorial is nonnegative.[ 4]
For brevity, solutions with m < 0Script error: No such module "Check for unknown parameters". and j 1 < j 2 Script error: No such module "Check for unknown parameters". are omitted. They may be calculated using the simple relations
⟨ j 1 , j 2 ; m 1 , m 2 ∣ j 1 , j 2 ; j , m ⟩ = ( − 1 ) j − j 1 − j 2 ⟨ j 1 , j 2 ; − m 1 , − m 2 ∣ j 1 , j 2 ; j , − m ⟩ .
and
⟨ j 1 , j 2 ; m 1 , m 2 ∣ j 1 , j 2 ; j , m ⟩ = ( − 1 ) j − j 1 − j 2 ⟨ j 2 , j 1 ; m 2 , m 1 ∣ j 2 , j 1 ; j , m ⟩ .
Specific values
The Clebsch–Gordan coefficients for j values less than or equal to 5/2 are given below.[ 5]
j 2 = 0 Script error: No such module "Check for unknown parameters".
When j 2 = 0Script error: No such module "Check for unknown parameters". , the Clebsch–Gordan coefficients are given by δ j , j 1 δ m , m 1 .
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = 1, j 2 = 1/2 Script error: No such module "Check for unknown parameters".
j 1 = 1, j 2 = 1 Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = 1 Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = 2, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = 2, j 2 = 1 Script error: No such module "Check for unknown parameters".
m = 1Script error: No such module "Check for unknown parameters".
Template:Diagonal split header
3
2
1
2, −1
1 1 5
1 3
3 5
1, 0
8 1 5
1 6
− 3 1 0
0, 1
2 5
− 1 2
1 1 0
j 1 = 2, j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = 2, j 2 = 2 Script error: No such module "Check for unknown parameters".
m = 1Script error: No such module "Check for unknown parameters".
Template:Diagonal split header
4
3
2
1
2, −1
1 1 4
3 1 0
3 7
1 5
1, 0
3 7
1 5
− 1 1 4
− 3 1 0
0, 1
3 7
− 1 5
− 1 1 4
3 1 0
−1, 2
1 1 4
− 3 1 0
3 7
− 1 5
m = 0Script error: No such module "Check for unknown parameters".
Template:Diagonal split header
4
3
2
1
0
2, −2
1 7 0
1 1 0
2 7
2 5
1 5
1, −1
8 3 5
2 5
1 1 4
− 1 1 0
− 1 5
0, 0
1 8 3 5
0
− 2 7
0
1 5
−1, 1
8 3 5
− 2 5
1 1 4
1 1 0
− 1 5
−2, 2
1 7 0
− 1 1 0
2 7
− 2 5
1 5
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = 1 Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = 2 Script error: No such module "Check for unknown parameters".
j 1 = Template:Sfrac , j 2 = Template:Sfrac Script error: No such module "Check for unknown parameters".
SU(N) Clebsch–Gordan coefficients
Algorithms to produce Clebsch–Gordan coefficients for higher values of j 1 and j 2 , or for the su(N) algebra instead of su(2), are known.[ 6]
A web interface for tabulating SU(N) Clebsch–Gordan coefficients is readily available.
References
↑ Script error: No such module "Citation/CS1".
↑ Script error: No such module "Citation/CS1".
↑ Script error: No such module "citation/CS1".
↑ (2.41), p. 172, Quantum Mechanics: Foundations and Applications , Arno Bohm, M. Loewe, New York: Springer-Verlag, 3rd ed., 1993, Template:ISBN .
↑ Script error: No such module "citation/CS1". Table 1.4 resumes the most common.
↑ Script error: No such module "Citation/CS1".
External links